Tag Archives: roller plastic chain

China Black Plastic Flexible Drag Chain for 3D Printer and CNC Machines diamond roller chain

Merchandise Description

 

Cable carrier 

    G collection cable chain :the materials is nylon PA66 the numerous variations ,full technical specs and inventory is ample for rapidly shipping and delivery cycle and huge variety (a number of opening varieties:non-opening ,exterior opening ,closed bridge and many others.) this collection can meet distinct applications and various product purposes.
    Now our merchandise are  exported to far more than 30 international locations which includes South The united states, Japan and so on European ,The usa , Korea ,Japan ,Etc. with entire specifiction collection ,items inventory of the most and aggressive price tag .welcome your cooperation !
This product is extensively employed in a variety of device tools, this kind of as manipulators, robots, woodworking machinery, foods machinery, printing machinery, ceramic equipment, glass machinery, doorway and window machinery, numerous steel processing gear, engraving and milling equipment, engraving devices, etc. Different CNC machining centers.

Cable carrier –production Information
Specialist cable security accessories
High good quality nylon drag chain
Suited for engraving equipment, CNC device, manipulator

cable carrier depth information and catalogue as below:
1>Professional cable safety add-ons
2>High top quality nylon drag chain
3>Apply to engraving device CNC machine manipulator

6 main systems

1 > Simple to disassemble and assemble,Adjust the duration

2> High and lower temperature resistance,Out of doors obtainable

3> Strong framework,Strong bearing capacity

4> Higher top quality content,More time lifestyle

5> Manufacturing facility direct following-sales,right after-sale guarantee

6>High-speed movement ,Put on-resistant and slip-resistant

four attributes Extensive protection

01  High-power nylon content (PA66 substantial-top quality nylon)
Produced of new nylon substance, with high load resistance and abrasion resistance
02 powerful and secure , not straightforward to split
Precision mildew processing and forming . Suitable for cables under 16mm
03 Wear resistant and scratch resistant, high-velocity bass low sounds . clean procedure , take a look at provider life up to 20 million occasions.
04 Change the size, simple to disassemble and assemble
The drag chain is composed of sections, and the size can be modified in accordance to needs
                                         The application selection of drag chains is as follows:
our drag chain can be employed for CNC equipment instruments , digital equipment,glass machinery , doorway and window equipment , injection molding machines , manipulators , lifting and transportation , automation and so on .

                                           Cable provider-Solution parameters

The structure is more secure , the installatio is firmer. the precision CZPT is processed and shaped, the towing chain is firmer , the provider existence is longer .

Process circulation diagram-situation indicator
–01 The uncooked material 
–02production 
–03 Assembly
–Packaging

Item quality arrives from production abilities

01  Factory Power
The manufacturing facility and place of work location is about 6000 square meters , the variety of emplees is much more than one hundred, and the imported ZheJiang , Japan , Hong Kong and other equipments reach more than 50pcs . Our business has steady inventory and can meet up with the demands of customers’ wholesale .

02  R&D STRENGTH 
HangZhou CZPT Equipment CO., LTD. has dozens of experienced R&D and layout teams . Our mold design and style is up to date rapidly , keeping 1 to 2 new merchandise every thirty day period and top the industry with new traits. 

03>CUSTOMIZATION Power
HangZhou CZPT Equipment Co., Ltd. continually develops new procedures, introduces new technologies, patterns and customizes numerous individualized components for buyers, and all personalized goods in our firm are guaranteed to be shipped inside 1 thirty day period and personalized cycle Assured.

04  AFTER Income Energy
Dedicated consumers are offered 24 hours a day ,often andwer concerns for customers, and give services consumers at the very first time.

Packaging:
We use the carton to pack our productions.
Shipping:
Upon receipt of payment , delivery day will be in 3-5days, 
By Air, by Sea or by Convey (DHL and many others)
Cargo cost will depend on the destination, cargo way and the weight of the goods

Our Service:
Good quality
We will not compromise on the quality of our solutions.
We will supply a lot more than you expect.
Honesty and Integrity
The basis of our success is the honesty and integrity in which we perform with buyers.
Communication
We are specialist company, and your requirements will be comprehend well. 
We = Factory price tag + trading organization support
We pay attention.
We Realize Advertising and marketing
Our techniques are verified to be successful.
Our push retains in advance exhibits.
Set up Enterprise
It is far more than 10 several years considering that we start off the oversea company, our machinery parts and services have been accredited and content by foreign clientele above thirty nations.
We have survived the very best and the worst of the financial system although continuing to grow each and every calendar year.
Continually Evolving
Our focused group is continuously exploring new and forthcoming systems that empower us to run our organization much more successfully.

Following income provider
1. Warranty: 1 Years.
two. Any concerns, you can mail/get in touch with us at any time. And our most skilled engineers are assigned to give consulting services, and always obtainable for dispatching overseas.
three. Before delivering the item. , Our quality personnel will examine the good quality of our goods
4. Our generation catalogue is in English.

Why Decide on Us?
1.We are 1 of the most significant manufacturers on machines areas in China
two.We have more than 10years expertise on producing and exporting.
3.We have the superb good quality control.
4.We have the aggressive price.
5.We have the accomplished income and services crew so that we can offer you the ideal service

For far more information, make sure you speak to us freely. 

 

 

 
 
 
 
 
 
 
 
 
 
 

 

US $2.9
/ Piece
|
100 Pieces

(Min. Order)

###

After-sales Service: We Have Dedicated After-Sales Service Personnel
Warranty: Its Tested Service Life Is up to 10 Million Times
Logo Printing: with Logo Printing
Size: Middle
Customized: Customized
Type: Semi-Enclosed Type Interior Opening

###

Samples:
US$ 1/Piece
1 Piece(Min.Order)

|
Request Sample

###

Customization:
US $2.9
/ Piece
|
100 Pieces

(Min. Order)

###

After-sales Service: We Have Dedicated After-Sales Service Personnel
Warranty: Its Tested Service Life Is up to 10 Million Times
Logo Printing: with Logo Printing
Size: Middle
Customized: Customized
Type: Semi-Enclosed Type Interior Opening

###

Samples:
US$ 1/Piece
1 Piece(Min.Order)

|
Request Sample

###

Customization:

How to choose a roller chain for a conveyor

When choosing a roller chain for your conveyor, the easiest way is to refer to the horsepower and RPM charts. The horsepower and rpm of the small drive sprocket will determine the size and number of teeth of the chain. Conveyor chains are available in a variety of options, including moving products horizontally, vertically, or around a bend radius. When choosing a conveyor chain, consider the purpose of the chain. For example, if you’re delivering products to customers’ doorsteps, you might choose chains that can move products up and down a hallway or warehouse.

Double pitch

Double pitch roller chains are a popular way to drive agricultural equipment. It has twice the pitch of a standard roller chain and is ideal for light-duty drives. Extended pitch increases performance at lower speeds, but requires fewer components per foot than standard single-pitch chains. Compared to single-pitch roller chains, double-pitch chainplates are longer and are suitable for lighter loads. Read on to learn more about double pitch chains and how they can improve your operation.
The most common type of conveyor chain is double pitch. It is used in the auto parts industry, as well as in the precision machinery industry. It is made from the same components as the standard drive roller chain, except it has longer side plates. Double pitch chains are often used on slow-moving conveyors to reduce the stress placed on them. Industries that commonly use double pitch conveyor chains include airport equipment manufacturers, lumber mills, and fruit packing plants.
RS series roller chains are manufactured from high-quality stainless steel. It has excellent chemical and abrasion resistance and is available in a variety of cord lengths. RS sprockets have over 30 teeth. They contain all the necessary connection links for easy installation. PEER Chain offers double pitch roller chain attachments including pre-stretched chains, sprockets, and other attachments.
Double pitch roller chains have several advantages over standard chains. Double pitch chains have double the pitch, making them ideal for conveying applications such as conveyors. In addition to that, it also provides ANSI-compliant styles. These chains also have free connection links. When shopping for a double pitch roller chain, be sure to choose the one that fits your requirements and budget. They will last longer and save you money in the long run.
Double pitch roller chains to ANSI standards feature oversized rollers. These chains are best suited for applications where the product is mounted on top of the chain. They are ideal for agricultural applications where cotton is on top of the drum. Also, this type of chain is used in light-duty conveyors and agricultural applications. You can find double pitch roller chains in a variety of sizes and styles. And, as long as you know what you want, you’ll be happy with the results.
chain

Self-lubricating

Self-lubricating roller chains eliminate the need for manual relubrication, providing long-lasting operation and reducing maintenance costs. These chains are particularly popular in industries such as the food and beverage industry, textiles, printing, and sawmills. They can also replace standard roller chain drives and conveyor chains. Manufactured to the specific standard ISO R606, these chains are ideal replacements for conventional chains. PC chains are particularly beneficial for food and beverage production and packaging applications due to their anti-corrosion properties.
Self-lubricating roller chains meet ISO, ASME/ANSI, and DIN standards. They are interchangeable with standard chains of the same size and shape and can be used in a variety of industrial applications. Self-lubricating chains have special oil-impregnated sleeves to reduce maintenance time. These chains are also suitable for applications where cleanliness is an issue.
Self-lubricating roller chains are manufactured with unique RS attachments. Rather than a traditional roller chain with an external lubricating ring, this type of chain retains the lubricant within its bushings. During operation, the application generates heat, heating the lubricant, which flows out of the pin and bushing area. Therefore, CZPT roller chains are ideal for certain food conveying applications.
In addition to self-lubricating roller chains, carbon steel, stainless steel or nickel-plated steel are also available. Self-lubricating roller chains are available in different sizes depending on the application, including 0.375″ wide profile straight-chain, extended pin chain, and four-link. In addition, these chains are also available in ANSI and BS chain specifications.

Accumulation

Whether you need to move large or small loads, accumulating roller chains are a viable solution. This chain conveyor is designed with low back pressure to transport large and bulky items with minimal noise. Free-running rollers within the chain help create a smooth build-up surface. These chains are available in a variety of options, including accumulating rollers of different pitches.
The accumulation and release roller chain 14 includes an upper part 15 and a lower part 16. The upper part 15 rests in the upper subspace 28, while the lower part 16 rests on the top side 20 of the profile. As the upper belt 15 rolls around the accumulation roller chain 14, it aligns with the lower chain 16 to form a continuous receiving space. This arrangement allows the accumulation roller chain 14 to rest on the top surface of the support profile 11.
A cumulative roller chain consists of many individual parts. Each section of the chain has an elongated cylindrical shape and is connected to each other by hinged joints. Each chain section also has an accumulation and release roller associated therewith. Each roller protrudes from the upper side 20 and the lower side 21 of the chain portion. The accumulation rollers are movable about an axis 22 extending transversely to the longitudinal axis of the chain.
A feature of the stacking and releasing roller chain is its simplicity. The conveyor has a profiled section that is permanently divided into two cross-sectional spaces. The bottom space is closed from all sides. The upper space accommodates the conveyor line. The contoured portion includes an opening that guides the bottom strap. A shunt can also be inserted between the two sections. The accumulating roller chain system is a convenient and versatile way to move bulky items.
There are many different types of accumulating roller chains. Some chains have offset rollers for optimal load distribution. Others have protection to prevent machine wear. Some run without lubricant, which is a safety advantage. In addition to protection, cumulative chains can also provide protection. The side bow version of the accumulation and release roller chain with offset accumulation and release rollers is designed for conveyor systems with very small bend radii.
chain

Without bushing

Bushless roller chains are the most common type of industrial chain. They are simple in design and require only regular maintenance. Regular maintenance includes lubricating, assessing wear, and replacing worn sprockets. For more information, please read the following information:
The outer chainplates and the inner chain plates are alternately arranged in pairs. The connecting pin extends through the hole in the inner link plate. The rollers thus positioned can be rotated on the connecting pins. Oil provided between the outer circumferential surfaces of each connecting pin serves to lubricate the chain. This system reduces noise and wears caused by collisions between inner chain plates and sprockets.
Compared to traditional roller chains, bushings roller chains have rollers around the bushing. These rollers are in rolling contact with the sprocket teeth, providing low friction and excellent wear resistance. To ensure smooth operation, bushings roller chains must be greased to prevent rust and keep the chain properly tensioned. Lubricated chains run smoother and last longer.
In a bushingless chain, the inner links are shaped like half bushings and ride on the rollers. The pins go through the outer plate and connect the inner links to the rollers. The outer plates overlap the inner links and open the pins. This system is also known as a heterochain. This type of chain is more common than traditional roller chains. If you are not sure which type of bushingless roller chain to choose, you may need to purchase an additional pair of inner chainplates.
Linerless roller chains may also include chain guides. In a bushingless roller chain, the outer and inner link plates conform to the surfaces of the guide rails. Thus, the large area of contact between the chain and the guide rail is eliminated, the friction loss is reduced, and the power transmission efficiency is improved. These properties make bushless roller chains more efficient and durable than traditional roller chains. It’s also less noisy. If you are looking for a chain with a lower noise level, a bushingless roller chain may be the right choice for you.

China Black Plastic Flexible Drag Chain for 3D Printer and CNC Machines     diamond roller chainChina Black Plastic Flexible Drag Chain for 3D Printer and CNC Machines     diamond roller chain
editor by czh 2023-01-24

China High Quality Bridge Open Type Closed Semi-Closed Drag Cable Chains Plastic Machine Tools Nylon Tank Chain for CNC Machine 3D Printer metric roller chain

Item Description

Large High quality Bridge Open kind Closed Semi-Shut Drag cable Chains Plastic Machine resources Nylon tank Chain for CNC Machine 3D printer 


 

Solution Identify

Engineering plastics tank towline Nylon Cable Drag Chain for laser machine Cable observe safety

Inner Dimension

38*25, 50*25, 70*25, seventy seven*25, 75*35, 100*35, 125*45, one hundred fifty*45, 200*fifty five, 250*fifty five

Outer Dimension

fifty seven*forty, 69*forty, 90*forty, 104*forty, 100*55, a hundred twenty five*fifty five, 152*sixty five, one hundred eighty*sixty six, 230*seventy five, 280*75

Bend Radius

100, one hundred twenty five, two hundred, 250

Shade

Black, Yellow, Red

Materials

Nylon

Duration:

2000mm (personalized)

OEM & ODM Availability

Sure

 

 

US $3.6-30
/ Meter
|
1 Meter

(Min. Order)

###

After-sales Service: Yes
Warranty: 1.5 Years
Logo Printing: Optional
Size: Middle
Customized: Customized
Type: Open/Closed

###

Samples:
US$ 1/Piece
1 Piece(Min.Order)

|
Request Sample

###

Customization:

###

Product Name
Engineering plastics tank towline Nylon Cable Drag Chain for laser machine Cable track protection
Inner Size
38*25, 50*25, 70*25, 77*25, 75*35, 100*35, 125*45, 150*45, 200*55, 250*55
Outer Size
57*40, 69*40, 90*40, 104*40, 100*55, 125*55, 152*65, 180*66, 230*75, 280*75
Bend Radius
100, 125, 200, 250
Color
Black, Yellow, Red
Material
Nylon
Length:
2000mm (customized)
OEM & ODM Availability
Yes
US $3.6-30
/ Meter
|
1 Meter

(Min. Order)

###

After-sales Service: Yes
Warranty: 1.5 Years
Logo Printing: Optional
Size: Middle
Customized: Customized
Type: Open/Closed

###

Samples:
US$ 1/Piece
1 Piece(Min.Order)

|
Request Sample

###

Customization:

###

Product Name
Engineering plastics tank towline Nylon Cable Drag Chain for laser machine Cable track protection
Inner Size
38*25, 50*25, 70*25, 77*25, 75*35, 100*35, 125*45, 150*45, 200*55, 250*55
Outer Size
57*40, 69*40, 90*40, 104*40, 100*55, 125*55, 152*65, 180*66, 230*75, 280*75
Bend Radius
100, 125, 200, 250
Color
Black, Yellow, Red
Material
Nylon
Length:
2000mm (customized)
OEM & ODM Availability
Yes

CZPT silent roller chain

The development of roller chains benefited from the concept of automated manufacturing introduced by Henry Ford. Conveyor belts and chains have been around for centuries, and as Ford expanded the concept of automobile manufacturing, roller chains became popular. Today, they are used in factories and lumber mills to move items quickly, sort, and move items vertically or horizontally. There are conveyors for other purposes, including sorting and placing items into truck beds.

CZPT roller chain

Founded in 1890, the company is the world’s leading manufacturer of high-performance roller chain systems. The company focuses on power transmission, industrial production, and the aftermarket. The company uses the highest quality materials for its chains and carefully designs, manufactures, and assembles each component. With more than a century of experience, the company continues to exceed customer expectations and industry standards. This is evident in the chain’s name and logo.
The company also offers manufacturers a full range of service options. These include on-site maintenance and application engineering. Headquartered in Indianapolis, Indiana, the company provides chain drive repair and maintenance services. In addition to providing best-in-class products, CZPT also provides customized service solutions for any industry. For more information, visit the CZPT website. Below are some of the benefits of choosing a CZPT roller chain.
CZPT roller chains reflect many advancements in chain technology. Its components are shot-peened with a high-speed iron shot to maximize toughness and longevity. The chain is also factory preloaded, no need to stretch and adjust prematurely to tighten the chain. Ultimately, a high-quality CZPT roller chain will save you time and money. It is the most durable roller chain on the market. Although more expensive to produce, it will last longer.
There are many types of materials used to construct roller chains. Common materials include steel, stainless steel, and brass. The material used to make the chain also plays a vital role in durability. In addition to steel, chain manufacturers use different heat treatments for their components. The quality of the pitch hole fabrication, heat treatment, and shot peening of the steel affects the fatigue strength of the chain. The design and thickness of the link plates are also important in determining fatigue strength.
chain

CZPT silent chain

The CZPT silent chain is an inverted gear that eliminates friction during articulation. It is also a non-slip durable chain. Its design can be customized to suit various industrial applications. It features a patented wear protection system including connecting links and stainless steel components. Here are some of its benefits. There are some pros and cons here.
The “CZPT” silent chain is driven by a motor through the PS-1 capsule. The chain runs quietly, won’t slip or seize anything, and needs regular lubrication to maintain peak performance. Heavy engine oil or cup grease is an ideal lubricant. The arrows marked on each link point in the direction the chain should move. Avoid using non-solids greases.
The company’s other products include a range of worm gear reducers. CZPT is committed to providing high-quality products at affordable prices. They also manufacture miter gear reducers, plastic belts, and conveyor chains. You can contact Dalton Bearing for more information on CZPT products. We will help you determine the right solution for your specific application. You can also contact us for more information about our product line.
The CZPT Quiet Chain range features unique “M” gauge pins with high surface hardness. It also features advanced chain assembly technology. The company manufactures CZPT timing chains for motorcycle applications in Japan. Its benefits include smooth and noise-free transmission. Also, it reduces the size. Therefore, it is an excellent choice for motorcycle engines. But be sure to consult an expert before buying.

Rexnord Roller Chains

If you are looking for reliable heavy-duty roller chains, you have come to the right place. Regal Rexnord has a complete line of prestressed roller chains in all sizes and types, from single to multi-strand, as well as a wide range of accessories. Specialty chains are also available, including HV and SC chains.
Rexnord’s roller chains are available in a variety of sizes and styles, including double pitch drive chains for the long center, low-speed applications. They are made of stainless steel for corrosion resistance and are factory lubricated for easy maintenance. Rexnord’s roller chains also feature armor pins and wide waist sidebars for added safety and durability. It comes in different styles and configurations for a variety of applications including conveyors, elevators, and commercial sprinkler systems.
chain

Competitor roller chain

Oil Field Roller Chains Market research report provides a comprehensive analysis of the market including macro and micro trends, pricing analysis, and strategic analysis of key competitors. It also includes an in-depth review of market trend innovations and key segment identification. It also provides insights into competitive scenarios and drivers driving the market growth. It also covers the latest trends and strategies for the future of the industry.
To understand the competitive landscape of the Oil Field Roller Chains market, the strengths and weaknesses of each leading manufacturer must be analyzed. One of the key measurements of a roller chain is tensile strength, which determines the ability to withstand a one-time load before breaking. Fatigue strength, on the other hand, represents the maximum load that a chain can withstand over a long period of time. By comparing these two performance metrics, you can determine the best brand and type for your specific requirements.

Application of roller chain

A roller chain is a simple mechanical power transmission system consisting of a series of short cylindrical rollers connected together by side links and driven by gears called sprockets. This simple, reliable, and efficient system is commonly used to convey materials and is ideal for many different applications. This type of chain is widely used in conveyors and bucket elevators and is available in a variety of power ratings and designs.
The most common drive chains are the single-strand standard series with power ratings ranging from 0.5 to 100 kW. Alternatively, the multi-strand model is a higher performance alternative that offers higher power capacity without increasing chain pitch or line speed. The other is the silent chain, also known as the inverted tooth chain. It is designed to be noiseless and to eliminate the negative effects of stretching. It rides on the teeth of the sprocket and its radius increases as it moves. It automatically corrects slight pitch changes. It also provides smooth, long-lasting service that runs smoothly.
A roller chain consists of 5 basic components: bushings, rollers, and pins. Each individual link is held together with a pin or bushing. The pin goes through a bushing in the inner link to prevent rotation. The advantages of roller chains make them one of the most efficient power transmission and conveying options. CZPT prides itself on its knowledge and experience in roller chain applications. Below are some common uses of roller chains.
Certain applications require less than ideal roller chain performance. To meet these challenges, manufacturers offer a variety of options. A self-lubricating chain can be used to keep the chain clean and reduce dust. Oil-contaminated chains can also be used for special applications. Other materials, such as stainless steel, can help retard corrosion and improve the wear resistance of the chain. Additionally, they can be used in a variety of environments, such as food processing machinery.

China High Quality Bridge Open Type Closed Semi-Closed Drag Cable Chains Plastic Machine Tools Nylon Tank Chain for CNC Machine 3D Printer     metric roller chainChina High Quality Bridge Open Type Closed Semi-Closed Drag Cable Chains Plastic Machine Tools Nylon Tank Chain for CNC Machine 3D Printer     metric roller chain
editor by czh 2023-01-13

China Wholly Plastic Compensation Chain Elevator Balance Compensation Chain roller chain clamp

Merchandise Description


 

 

Elevator WFO Plastic Stability Compensation Chain for Elevators and Lifts

Fundamental parameters:

Product No. Device Fat(kg/m) Exterior diameter(mm) Min. bending diameter(mm) Damaged load(≥KN)
WFO 075 1.12±0.2 24±1.5 610 11.twenty five
WFO one hundred one.49±0.2 29±1.5 610 thirteen.32
WFO 120 1.88±0.two 31±1.5 610 eighteen.
WFO a hundred and fifty two.23±0.two 35±1.5 610 23.sixty six
WFO 200 2.98±0.2 38±1.5 610 29.ninety seven
WFO 250 three.72±0.two 42±1.five 610 forty.82
WFO three hundred 4.46±0.2 45±1.5 610 forty six.fifty eight
WFO 350 five.2±0.one 49±1.five 610 53.four
WFO four hundred 5.68±0.1 52±1.5 610 62.6

Color picked: black, purple, bule, environmentally friendly and so on

Connected Products

·Shaft Parts consists of
Machined /Chilly Drawn/ Hollow Xihu (West Lake) Dis. Rail, Fishplate, Fasteners, Anchor Bolt, Rail Rracket and so on.
·Elevator Cabin includes
Full Elevaotr Cabin, Auto Body, Counterweight Body and Counterweight Block,Xihu (West Lake) Dis. Sneakers, Rope Attachment and many others.
·Door Program involves
Mitsubishi, Fermator and Selcom Door Operator and Landing Doorway, Doorway Panel, Doorway Spare Areas,Basic safety Light-weight Curtain/Photocell and many others.
·Safetey Parts includes
Security Equipment, Pace Governor, Rope Brake, Oil Buffer and Rubber Buffer and so forth.
·Traction Technique includes
Geared/Gearless Traction Equipment, Pulley Sheave,Anti-Vibration Pad,Steel Wire Rope and many others.
·Electrical Elements inclueds
Built-in and Divided Controlling Cupboard,Yaskawa L1000A Inverter, Elevator Exhibit,COP&LOP&HOP, Elevator Button, Flat Traveling Cable and so forth.

Business Info

Packaging & ShippingFAQ

one. Value
Re: please send us inquiry from Manufactured in China, we will qutoe to you inside of 24 hours. It’s far more practical and appreciated for us if you supply your business specifics and your depth inquiry for with elevators.

2. Payment term
Re: T/T or L/C at sight. 

3. Installation&Maintaining
Re: We will ship set up&keeping handbook together with the with elevator.
Our sugguestion is to retain the services of a professional nearby firm for installation and foreseeable future maintaining,
as soon as you require any complex assistant from us, just don’t wait to contact us by mail or mobile phone.
Technician will be despatched to the task website if required.
 
four. Delivery&price tag time period

Re: The two FOB/CIF/CFR  price term are okay, we have reliable forwarder supporting set up the shipment for you.

US $3-15
/ Meter
|
100 Meters

(Min. Order)

###

Type: Driving System
Suitable for: Elevator
Load Capacity: 3000kg
Persons: 6-10
Speed: 1.00-2.00m/s
Drive Mode: AC

###

Model No. Unit Weight(kg/m) External diameter(mm) Min. bending diameter(mm) Broken load(≥KN)
WFO 075 1.12±0.2 24±1.5 610 11.25
WFO 100 1.49±0.2 29±1.5 610 13.32
WFO 120 1.88±0.2 31±1.5 610 18.0
WFO 150 2.23±0.2 35±1.5 610 23.66
WFO 200 2.98±0.2 38±1.5 610 29.97
WFO 250 3.72±0.2 42±1.5 610 40.82
WFO 300 4.46±0.2 45±1.5 610 46.58
WFO 350 5.2±0.1 49±1.5 610 53.4
WFO 400 5.68±0.1 52±1.5 610 62.6
US $3-15
/ Meter
|
100 Meters

(Min. Order)

###

Type: Driving System
Suitable for: Elevator
Load Capacity: 3000kg
Persons: 6-10
Speed: 1.00-2.00m/s
Drive Mode: AC

###

Model No. Unit Weight(kg/m) External diameter(mm) Min. bending diameter(mm) Broken load(≥KN)
WFO 075 1.12±0.2 24±1.5 610 11.25
WFO 100 1.49±0.2 29±1.5 610 13.32
WFO 120 1.88±0.2 31±1.5 610 18.0
WFO 150 2.23±0.2 35±1.5 610 23.66
WFO 200 2.98±0.2 38±1.5 610 29.97
WFO 250 3.72±0.2 42±1.5 610 40.82
WFO 300 4.46±0.2 45±1.5 610 46.58
WFO 350 5.2±0.1 49±1.5 610 53.4
WFO 400 5.68±0.1 52±1.5 610 62.6

How to choose a roller chain for a conveyor

When choosing a roller chain for your conveyor, the easiest way is to refer to the horsepower and RPM charts. The horsepower and rpm of the small drive sprocket will determine the size and number of teeth of the chain. Conveyor chains are available in a variety of options, including moving products horizontally, vertically, or around a bend radius. When choosing a conveyor chain, consider the purpose of the chain. For example, if you’re delivering products to customers’ doorsteps, you might choose chains that can move products up and down a hallway or warehouse.

Double pitch

Double pitch roller chains are a popular way to drive agricultural equipment. It has twice the pitch of a standard roller chain and is ideal for light-duty drives. Extended pitch increases performance at lower speeds, but requires fewer components per foot than standard single-pitch chains. Compared to single-pitch roller chains, double-pitch chainplates are longer and are suitable for lighter loads. Read on to learn more about double pitch chains and how they can improve your operation.
The most common type of conveyor chain is double pitch. It is used in the auto parts industry, as well as in the precision machinery industry. It is made from the same components as the standard drive roller chain, except it has longer side plates. Double pitch chains are often used on slow-moving conveyors to reduce the stress placed on them. Industries that commonly use double pitch conveyor chains include airport equipment manufacturers, lumber mills, and fruit packing plants.
RS series roller chains are manufactured from high-quality stainless steel. It has excellent chemical and abrasion resistance and is available in a variety of cord lengths. RS sprockets have over 30 teeth. They contain all the necessary connection links for easy installation. PEER Chain offers double pitch roller chain attachments including pre-stretched chains, sprockets, and other attachments.
Double pitch roller chains have several advantages over standard chains. Double pitch chains have double the pitch, making them ideal for conveying applications such as conveyors. In addition to that, it also provides ANSI-compliant styles. These chains also have free connection links. When shopping for a double pitch roller chain, be sure to choose the one that fits your requirements and budget. They will last longer and save you money in the long run.
Double pitch roller chains to ANSI standards feature oversized rollers. These chains are best suited for applications where the product is mounted on top of the chain. They are ideal for agricultural applications where cotton is on top of the drum. Also, this type of chain is used in light-duty conveyors and agricultural applications. You can find double pitch roller chains in a variety of sizes and styles. And, as long as you know what you want, you’ll be happy with the results.
chain

Self-lubricating

Self-lubricating roller chains eliminate the need for manual relubrication, providing long-lasting operation and reducing maintenance costs. These chains are particularly popular in industries such as the food and beverage industry, textiles, printing, and sawmills. They can also replace standard roller chain drives and conveyor chains. Manufactured to the specific standard ISO R606, these chains are ideal replacements for conventional chains. PC chains are particularly beneficial for food and beverage production and packaging applications due to their anti-corrosion properties.
Self-lubricating roller chains meet ISO, ASME/ANSI, and DIN standards. They are interchangeable with standard chains of the same size and shape and can be used in a variety of industrial applications. Self-lubricating chains have special oil-impregnated sleeves to reduce maintenance time. These chains are also suitable for applications where cleanliness is an issue.
Self-lubricating roller chains are manufactured with unique RS attachments. Rather than a traditional roller chain with an external lubricating ring, this type of chain retains the lubricant within its bushings. During operation, the application generates heat, heating the lubricant, which flows out of the pin and bushing area. Therefore, CZPT roller chains are ideal for certain food conveying applications.
In addition to self-lubricating roller chains, carbon steel, stainless steel or nickel-plated steel are also available. Self-lubricating roller chains are available in different sizes depending on the application, including 0.375″ wide profile straight-chain, extended pin chain, and four-link. In addition, these chains are also available in ANSI and BS chain specifications.

Accumulation

Whether you need to move large or small loads, accumulating roller chains are a viable solution. This chain conveyor is designed with low back pressure to transport large and bulky items with minimal noise. Free-running rollers within the chain help create a smooth build-up surface. These chains are available in a variety of options, including accumulating rollers of different pitches.
The accumulation and release roller chain 14 includes an upper part 15 and a lower part 16. The upper part 15 rests in the upper subspace 28, while the lower part 16 rests on the top side 20 of the profile. As the upper belt 15 rolls around the accumulation roller chain 14, it aligns with the lower chain 16 to form a continuous receiving space. This arrangement allows the accumulation roller chain 14 to rest on the top surface of the support profile 11.
A cumulative roller chain consists of many individual parts. Each section of the chain has an elongated cylindrical shape and is connected to each other by hinged joints. Each chain section also has an accumulation and release roller associated therewith. Each roller protrudes from the upper side 20 and the lower side 21 of the chain portion. The accumulation rollers are movable about an axis 22 extending transversely to the longitudinal axis of the chain.
A feature of the stacking and releasing roller chain is its simplicity. The conveyor has a profiled section that is permanently divided into two cross-sectional spaces. The bottom space is closed from all sides. The upper space accommodates the conveyor line. The contoured portion includes an opening that guides the bottom strap. A shunt can also be inserted between the two sections. The accumulating roller chain system is a convenient and versatile way to move bulky items.
There are many different types of accumulating roller chains. Some chains have offset rollers for optimal load distribution. Others have protection to prevent machine wear. Some run without lubricant, which is a safety advantage. In addition to protection, cumulative chains can also provide protection. The side bow version of the accumulation and release roller chain with offset accumulation and release rollers is designed for conveyor systems with very small bend radii.
chain

Without bushing

Bushless roller chains are the most common type of industrial chain. They are simple in design and require only regular maintenance. Regular maintenance includes lubricating, assessing wear, and replacing worn sprockets. For more information, please read the following information:
The outer chainplates and the inner chain plates are alternately arranged in pairs. The connecting pin extends through the hole in the inner link plate. The rollers thus positioned can be rotated on the connecting pins. Oil provided between the outer circumferential surfaces of each connecting pin serves to lubricate the chain. This system reduces noise and wears caused by collisions between inner chain plates and sprockets.
Compared to traditional roller chains, bushings roller chains have rollers around the bushing. These rollers are in rolling contact with the sprocket teeth, providing low friction and excellent wear resistance. To ensure smooth operation, bushings roller chains must be greased to prevent rust and keep the chain properly tensioned. Lubricated chains run smoother and last longer.
In a bushingless chain, the inner links are shaped like half bushings and ride on the rollers. The pins go through the outer plate and connect the inner links to the rollers. The outer plates overlap the inner links and open the pins. This system is also known as a heterochain. This type of chain is more common than traditional roller chains. If you are not sure which type of bushingless roller chain to choose, you may need to purchase an additional pair of inner chainplates.
Linerless roller chains may also include chain guides. In a bushingless roller chain, the outer and inner link plates conform to the surfaces of the guide rails. Thus, the large area of contact between the chain and the guide rail is eliminated, the friction loss is reduced, and the power transmission efficiency is improved. These properties make bushless roller chains more efficient and durable than traditional roller chains. It’s also less noisy. If you are looking for a chain with a lower noise level, a bushingless roller chain may be the right choice for you.

China Wholly Plastic Compensation Chain Elevator Balance Compensation Chain     roller chain clampChina Wholly Plastic Compensation Chain Elevator Balance Compensation Chain     roller chain clamp
editor by czh 2023-01-03

China Colored Plastic Road Safety Warning Chain c2060h roller chain

Product Description

Colored Plastic Highway Security Warning Chain

Plastic chains have numerous various specs, various hues, and could be produced in any size, which is utilized in road safety, and channel isolation of the lodge, searching malls, activity events and general public spot.

Product No. Diameter In-size Out-width Bodyweight(g/m) Part
S-1601 3mm 12mm 10mm 18g spherical
S-1602 4mm 25mm 18mm 39g round
S-1603 6mm 27mm 20mm 60g flat
S-1604 6mm 41mm 21mm 65g flat
S-1605 6mm 24mm 22mm 76g round
S-1606 8mm 38mm 26mm 103g flat
S-1607 8mm 54mm 27mm 103g flat
S-1608 10mm 54mm 36mm 206g round
S-1609 12mm 66mm 42mm 299g round

 

Usage: Warning Chain
Material: Plastic
Structure: Roller Chain
Color: Multi-Colored
Chain Material: Polyester
Shape: Round or Flat

###

Customization:

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Model No. Diameter In-length Out-width Weight(g/m) Section
S-1601 3mm 12mm 10mm 18g round
S-1602 4mm 25mm 18mm 39g round
S-1603 6mm 27mm 20mm 60g flat
S-1604 6mm 41mm 21mm 65g flat
S-1605 6mm 24mm 22mm 76g round
S-1606 8mm 38mm 26mm 103g flat
S-1607 8mm 54mm 27mm 103g flat
S-1608 10mm 54mm 36mm 206g round
S-1609 12mm 66mm 42mm 299g round
Usage: Warning Chain
Material: Plastic
Structure: Roller Chain
Color: Multi-Colored
Chain Material: Polyester
Shape: Round or Flat

###

Customization:

###

Model No. Diameter In-length Out-width Weight(g/m) Section
S-1601 3mm 12mm 10mm 18g round
S-1602 4mm 25mm 18mm 39g round
S-1603 6mm 27mm 20mm 60g flat
S-1604 6mm 41mm 21mm 65g flat
S-1605 6mm 24mm 22mm 76g round
S-1606 8mm 38mm 26mm 103g flat
S-1607 8mm 54mm 27mm 103g flat
S-1608 10mm 54mm 36mm 206g round
S-1609 12mm 66mm 42mm 299g round

Different types of drive chains

There are many different types of drive chains. You should be able to differentiate between roller chains, forged rivetless chains, double chains, flat-top chains, and helical chains by the terms used. This article will provide information on the different types of chains. Then, you can choose the right one according to your needs. If you haven’t purchased a chain yet, read this article to get started. It will also provide information on the pros and cons of each type.
chain

roller chain

There are several differences between drive chains and roller chains, but in essence, the two are functionally similar. The choice of which type to use depends largely on the type of environment it will be exposed to. While roller chains are suitable for clean indoor environments, they are not very forgiving when it comes to rubbing against the rails. Following are the main differences between a drive chain and a roller chain. Using the correct drive chain is essential for a smooth and efficient running machine.
Roller chain drive chains come in many different weights and tensile strengths. For light-duty applications, use a smaller pitch chain. For heavy-duty applications, use larger pitch chains. The design simplicity of these chains makes them ideal for a variety of applications. While they are great for a variety of applications, the durability of these chains makes them ideal for a variety of applications. Some of the main uses of roller chain drive chains are listed below.
When replacing the drive chain, be sure to follow the safety guidelines. The most important thing to remember is not to place the chain on a dirty floor as it may cause stretch or damage. After removing the chain from the sprocket, apply the measured load specified by ANSI to it. If the load exceeds this value, the chain may bend. A suitable load for measuring a drive chain should be at least six links.
While roller chains are usually made of carbon steel, some are made of stainless steel and are used in food processing machinery. In these environments, the chain may be made of stainless steel for lubrication. Brass and nylon are also sometimes used to meet these requirements. Regardless of the application, however, choosing the right drive chain is critical to the success of a roller chain machine. It is important to maintain the proper balance between the roller chain and the machine.
To properly use a roller chain, first determine the size of the sprocket used for the drive. The size of the chain should be smaller than the smallest sprocket to prevent tooth interference and provide adequate winding on the smaller sprocket. A good practice is to choose a drive chain with a center distance of 30 to 50 times the chain pitch. The longest possible center-to-center distance is approximately 80 times the chain pitch but is not recommended for high-speed applications.

Drop forged rivetless chain

Drop-forged rivetless drive chains are made of drop-forged steel components. Their proportions are suitable for strength and lightweight. Forged rivetless chains are generally divided into three types. Each of these types has its own set of important specifications. Key topics include minimum ultimate tensile strength, chain length tolerances, and link dimensions. Read on to learn more about each type and its uses.
One of the main features of forged rivetless chains is that, despite their relatively low price, they are designed to be very durable. The quality of a forged chain depends on the structure and design of the chain. The manufacturer of this type of drive chain is CZPT, which has a large stock of these chains. The chain is proof tested after assembly and comes with a two-year parts replacement warranty.
Forged rivetless chains are available in a variety of pitch sizes and strength grades. They are made of cast manganese or alloy steel and have an average strength of 24,000 to 300,000 pounds. These chains are suitable for automotive, conveyor, and material handling as well as meat packaging, sugar processing, and steel mill applications. They are also widely used in conveying systems. To ensure quality and performance, manufacturers offer a variety of forged chains.
CZPT offers forged CZPT drive chains for fatigue-free operation. The chain includes a solid one-piece forged drive pawl for optimum durability. Chains are available in Figure 8 and in D-shape styles. For more information, please contact CZPT directly. Custom Drop-Forged rivetless drive chains can be ordered. Manufacturers also offer custom chains for specific application needs.

double chain

Duplex drive chains have two sets of rollers instead of one, producing twice the power. Double chain roller chains have pins and roller bearings, while triple chain chains have an extra row of plates to accommodate the three sprockets. They are usually interchangeable with each other. They are available for US, UK, and ISO standards. They are made of carbon steel, stainless steel, and nickel or nickel-plated.
chain

flat top chain

Flat-top drive chains are ideal for curved or straight tracks and come in many different types and thicknesses. These chains are highly resistant to wear and are usually made of steel, stainless steel, or plastic. CZPT manufactures special brands of flat-top chains with high wear resistance and excellent noise reduction. In addition to being versatile, flat-top chains can be used in a variety of industrial applications.
There are two main types of CZPT chains: solid top or raised rib. One piece is formed from a single unit link and the other has roller base links for added strength. The two-piece chain combines flat tabletop links and a roller bottom chain for added strength. These chains are available in widths up to 20 feet and are available in a variety of widths. These chains are available in stainless steel, cast iron, or plastic.
The hinge pin is another important part of the flat top chain system. Support chain plate to ensure smooth conveying. The hinges are available in single hinge pin and double hinge pin styles. Standard hinge pins are designed for straight, narrow-width chainplates; double hinge pins are designed for longer, heavier products. The hinge pins also come in many different materials, including aluminum and galvanized steel. This allows for customization based on machine design, operating conditions, and drive method.
Whether your flat-top chain conveyor system is large or small, a high-quality flat-top chain will get the job done. With their low maintenance and low maintenance design, these chains are easy to clean and maintain. They can accommodate workpiece pallets of various sizes, and their flexibility makes them ideal for many different applications. They can also be highly customized for various industries. So if you need an industry-specific conveyor, then a flat-top drive chain is the way to go.

China Colored Plastic Road Safety Warning Chain     c2060h roller chainChina Colored Plastic Road Safety Warning Chain     c2060h roller chain
editor by czh 2022-12-22

China factory C2042 double pitch roller chain conveyor chain with big plastic roller sintered bush chain

Applicable Industries: Garment Outlets, Constructing Content Retailers, Producing Plant, Machinery Repair Stores, Farms
Common or Nonstandard: Common
Variety: Roller Chain
Content: ALLOY
Tensile Toughness: eighteen/4091 KN/Ibf
Solution identify: conveyor chain
Colour: Mother nature
Software: Equipment Elements
Construction: Link Chain
Certificate: ISO9001:2000
Pitch: 25.4mm
PAYMENT: T/T
Packing: Chain+Plastic Bag+ Carton+Picket Circumstance
Materail: forty five Mn
Sample: Approved
Packaging Particulars: Chain+Plastic Bag+ Carton+Picket Situation

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Company Information

Packaging & Shipping and delivery

Make contact with Us
FAQ
Q1: Are you maker or trade company?We are chain producer and exporter above 10 many years.
Q2:What is the chain coloration?Blue , metal mother nature color ,Black , nickel.
Q3:what is the creation duration of chain in typically ? 10fT ,5meters lengthy ,any other size is okay.
This fall.Can I get a sample to verify quality just before the buy ?As normal, we really do not suggest to ship sample because of to cost would be large. But we can offer test studies to check out.
Q5.How prolonged about your delivery time ?As usual, we can complete typical purchase with 60~seventy five times following drawings verified.
Q6.What is your bare minimum get quantity ?For non regular chains, our MOQ is a hundred meters and normal chains in stock, about twenty meters is available.
Q7.What conditions of payment you normally use?T/T thirty% deposit and 70% towards document, Western Union, L/C at sight.

Types of roller chains and their applications

There are many factors that can cause premature wear of the roller chain. They include friction, external shocks, and lack of lubrication or adjustment. Here are some tips to help you prevent premature chain wear. Read on to learn more about the different types of roller chains and their applications. You’ll be surprised how quickly the roller chain wears out! Below we have listed some of the most common causes of premature roller chain wear.

Double strand heavy-duty roller chain

If your application requires a heavy-duty chain, a double-strand steel roller chain is an excellent choice. Double-strand steel roller chains are manufactured to reduce stress fatigue and stretch, making them ideal for industrial and logging equipment. This type of chain is also heat-treated and shot-peened for excellent fatigue resistance and strength. Listed below are some of the advantages of double-strand heavy-duty roller chains.
When comparing single-strand and double-strand heavy-duty roller chains, double-strand steel roller chains are generally better. They have twice as many side plates and a working load close to that of a twin-strand steel roller chain. Unlike single-strand steel roller chains, double-strand roller chains are not interchangeable with standard double-sprockets. They use sprockets specially made for double chains.
Double strand chains are particularly strong, resistant to rust and corrosion, and ideal for high-stress applications. They are commonly used in conveyor systems, paper mill equipment, ditches, lifts, seed drills, and various hoisting machinery. They are also used in the wastewater and food processing industries. Chains of this type are used on conveyor lines, so they are an excellent choice for heavy machinery.
chain

Nickel-plated chain

Nickel-plated roller chains are ideal for outdoor work, mildly corrosive environments, and applications requiring a good chain appearance. Nickel plating increases component hardness and improves wear resistance while ensuring that all surfaces are protected. The benefits of nickel-plated roller chains include increased durability, corrosion resistance, and a bright shine. Here are a few reasons to use such a chain. All chains are manufactured to the highest quality and safety standards.
Although slightly corrosive, nickel-plated roller chains are ideal for applications in high salt and high humidity environments. However, nickel plating can peel and chip, so nickel roller chains are not recommended for use in food processing or other environments exposed to corrosive substances. ANSI B29.1 standard chain can be nickel-plated and is ideal for a variety of applications including industrial garage doors and boat lifts.
CZPT USA Corp. is committed to being the premier agricultural and industrial chain supplier in the United States. By focusing on quality, they ensure their chains provide long life and unmatched wear resistance. If you’re looking for a quality plated roller chain, consider choosing a chain from a leading manufacturer. If you need the durability and strength of a nickel roller chain, choose CZPT USA Corp. We manufacture the highest quality chains in the USA.
In addition to high strength, nickel-plated roller chains are also available in elastomer profiles. These types of chains can handle 1/2 to 3/4″ loads, depending on their pitch. They are also ideal for gentle traction on sensitive surfaces. The strength of these chains depends on the type of the main link used in the chain. Nickel-plated roller chains are available in a variety of sizes and are priced to suit a variety of applications.

Stainless steel chain

Stainless steel roller chains are ideal for industrial applications in two harsh environments. They have excellent chemical and corrosion resistance, as well as high strength. Chains are available in three grades to meet various operational needs. 304SS is suitable for food contact applications, while 316SS and 606SS offer excellent corrosion resistance. 600 series stainless steel provides excellent corrosion and wears resistance with precipitation hardened components.
In food processing, stainless steel chains are often exposed to extremely high temperatures and high concentrations of acids, alkalis, and water. They are also resistant to high concentrations of acid and chlorine. And their low magnetic permeability allows them to function properly in hygienic conditions. But stainless steel roller chains also have some disadvantages. Despite their excellent corrosion resistance, these chains are not recommended for use in food processing environments.
Compared to carbon steel, stainless steel roller chains are softer and hold longer. This means it may wear out faster. Since stainless steel is not heat-treated, its surface hardness is different from carbon steel. It retains heat for longer, reducing its tensile strength and extending its lifespan. Nonetheless, stainless steel roller chains are ideal for a variety of industrial applications.
The stainless steel roller chain is made of high-quality material. For example, the Premier series stainless steel roller chains are manufactured in Japan using a special type of stainless steel shot peening process. They also feature a solid roller design that reduces side flex. The Premier range also features highly polished side panels and is available in 10′ boxes, 50′ reels, and 100′ reels. They can also be cut to length if necessary.

Accumulation conveyor

Roller chain accumulation conveyors are designed to transport loads up to 440 lbs or 200 kg. The accumulator chain is located on large idler rollers to ensure quiet operation and the minimum force required to hold the pallet. They are suitable for various applications and can be integrated into the entire processing system. These conveyor belts have T-slots on three sides of the profile frame for connecting brackets and sensors.
Sensors installed in the accumulation area detect objects on the conveyor line and send signals to the motors that power the accumulation area. The motor can be external or built into the drum itself. Other types of sensors use light, such as photosensors. Photoelectric sensors detect objects by emitting and receiving specific wavelengths of light. This option is cost-effective because the sensor rollers are located slightly above the surface of the conveyor line.
Roller chain accumulation conveyors can be constructed of steel or plastic rollers. It can be equipped with staggered or coaxial rollers. Safety cover prevents accidental insertion of fingers into the chain, improving operator safety. The safety cover is compatible with the chain type and required bend radius. These caps are made of plastic clips that fit permanently on the inner links of the chain. They do not interfere with conveyed goods or workpiece carriers.
There are two basic types of accumulation conveyors: free flow and accumulation. Free-flowing chains allow conveyed objects to slide directly onto the chain while stacking chains allow goods to slide under the chain. Accumulation chains are commonly used in the food and packaging industries and have rollers that support conveyed objects. The free-flowing conveyor system eliminates the risk of damaging objects, as the rollers in the accumulation conveyor are in direct contact with the bottom of the cargo.
chain

Custom attachment

Standard accessories for roller chains are available in a variety of styles. Typically, they can be assembled on pin or roller links. When referring to connecting chains, it is important to know how to refer to pitch and center-to-center spacing. The pitch of the roller chain should include inner and outer roller links and must alternate every three pitches. Additionally, you can order custom accessories for pin or roller linkages. Below are some examples of custom accessories for roller chains.
Stainless steel roller chains are one of the most well-known chains for this application. It has a stainless steel 304 finish to create curved and straight lugs. For even more flexibility, you can also request custom accessories such as chain plate holes and pins. For added safety, various accessories can be attached to the single-pitch roller chain. It can also be made with multiple pins or curved lugs.
HKK Chains is stocked with much stainless steel and carbon steel standard connecting chains. Most of the time, they can assemble a custom accessory chain in no time. For example, a single-pitch chain with two connecting holes is called a wide profile. Additionally, chains can be manufactured in a variety of materials, including carbon steel, stainless steel, Lambda, plastic, and Ultra WP. In addition, a wide range of unique accessories is available for special industries.

China factory C2042 double pitch roller chain conveyor chain with big plastic roller     sintered bush chainChina factory C2042 double pitch roller chain conveyor chain with big plastic roller     sintered bush chain
editor by czh