Tag Archives: Flat Top Chain Conveyor

China Good quality Thermoplastic Conveyor Flat Top Chains LF820-K400 Table Top Conveyor Chains roller chain bolt

Product Description

The main application is for conveying various food products and containers.
The 820 is a plastic version of the related. The plastic chains however have a reinforcing middle rib underneath. The link thickness is 4.0 mm (0.16 in.) for the 820-series. The links overlap, so there is no space between the links.
Plate mat.:POM/PP; Pin mat.:stainless steel
Max.speed: 80m/min lubrication; 50m/min dry
Max.length:12m; Color:white/brown; Packing unit:10ft(80links)
APPLICATIONS:
China CZPT Machinery Co.,Ltd is a special supplier of conveyor system components,including plastic and stainless steel flat top chains, Modular belts, other spare parts, such as UHMWPE wearstrips, side guards, chains guide, bipods, tripods, brackets, clampls.ect.
With our years of experence, quality products, excellent services we work with world wide clients from America, Europe, Africa, many counrties of Asia. We keep very good business relation with them, and get trusted from them.
Our products application:
Packaging and conveying industry
Beverage bottling and handling industry
Food and meat processing industry
Chemical industry
Pharmaceuticals industry
Automobile industry
Electrical and electronics industry
Textile industry
Light engineering industry
 

Material: Plastic
Structure: Top Chain
Surface Treatment: Low Friction
Chain Size: Pitch 38.1mm
Color: Brown/White/Others
Materials: POM/PP/PE
Samples:
US$ 6/Meter
1 Meter(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

chain

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.

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 Good quality Thermoplastic Conveyor Flat Top Chains LF820-K400 Table Top Conveyor Chains   roller chain boltChina Good quality Thermoplastic Conveyor Flat Top Chains LF820-K400 Table Top Conveyor Chains   roller chain bolt
editor by CX 2023-05-16

China Good quality ISO ANSI DIN Stainless Steel Short Double Pitch Transmission Conveyor Agricultural Drop Forged Hollow Pin Flat Top Leaf Motorcycle Steel Roller Chain with Great quality

Product Description

TRANSMISSION ROLLER CHAIN

Feature

.  Long-life duration and high strength
.  Good performance of anti-rusty
.  Pre-stretching and running for each roll before delivery
.  All the chain parts are of complete heat-treatment and controlled within the standarded tolerance
.  Can produce any nonstandarded chain according to the drawing or sample

Production Range

1) A Series Short-Pitch Transmission Precision Roller Chain
25-1R, 35-1R, 40-1R, 50-1R , 60-1R, 80-1R, 100-1R, 120-1R, 140-1R, 160-1R, 180-1R, 200-1R, 240-1R
Double stand, triple strand are available

2). B Serieis Short-Pitch Transmission Precision Roller Chain
05B-1R, 06B-1R, 08B-1R, 10B-1R, 12B-1R, 16B-1R, 20B-1R, 24B-1R, 28B-1R, 32B-1R, 40B-1R, 48B-1R
Double stand, triple stand are available.

3). Short-Pitch Heavy Roller Chain
40H, 50H, 60H, 80H, 100H, 120H, 140H, 160H, 200H

4). Motorcycle Chain
25H, 219H, 420, 420H, 428, 428H, 520, 520H, 530, 530SH, 630
 

OTHER SERIES STEEL CHAIN

1. Conveyor chain: C2040, C2042, C2050, C2052, C2060, C2062, C2060H, C2062H, C2080, C2082, C2080H, C2082H, C2100, C2102, C2100H, C2120H, C2160, C2162, C2160H, C2162H, 

2. Hollow Pin Chain: C2040HP, C2050HP, C2042HP, C2052HP, C2060HP, C2062HP, C2080HP, C2082HP, 40HP, 50HP, 60HP, 80HP

3.  Agricultural Roller Chain: S32, S42, S45, S52, S55, S62, S77, S88, C550, C620, CA550, CA557, CA620
 

4. Welded Steel Cranked Link Mill Chain: W78, W82, W110, W111, W124, W132

5. Leaf Chain: BL622, BL623,BL634, BL644, BL646, BL666, BL688, BL822, BL823, BL834, BL844, BL846, BL866, BLF888, BL1571, BL1034, BL1046, BL1066, BL1222, BL1244, BL1288, BL1422, BL1444, BL1488, BL1622, BL1644, BL1688, BL2571, BL2034, BL2066, BL2088

6. Drop Forged Chain: X348, X458, X678, X689

7.  Chain Coupling: 4012, 4014, 4016, 5014, 5016, 5018, 6018, 6571, 6571, 8018, 8571, 8571, 10571, 12018
 

FAQ

Q1.  Can I have a sample order?
        Yes, any sample order is welcome to know the quality of our products.

Q2.  What about the lead time of the sample or the final order?
        2-5 days for normal sample.
        20-30 days for a formal order.

Q3. How much is the minimum quantity for each item in 1 order?
       Any quantity is ok to run.

Q4. Is it possible to print our logo or brand on the belt?
       Yes, we can print your logo or design on the belt after receipt of your formal authorization  letter of the logo or your brand.

Q5. Do you offer the guarantee for your product?
       Yes, usually we offer 1 year warranty for all of our products.

 

Standard or Nonstandard: Standard
Application: Textile Machinery, Conveyer Equipment, Motorcycle, Food Machinery, Mining Equipment, Agricultural Machinery
Surface Treatment: Polishing
Structure: Roller Chain
Material: Carbon Steel
Type: Short Pitch Chain
Samples:
US$ 0/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

chain

What is a roller chain?

What is a roller chain? A roller chain is a transmission system that transmits power from one shaft to another. Internal lubricant helps chains last longer and are interchangeable. Chains are usually made of carbon or alloy steel. Stainless steel is sometimes used in food processing machinery or in environments where lubrication is problematic. Brass and nylon are also sometimes used. If you need to slow down the machine, nylon chains can be used.

Roller chains are used to transmit power from one shaft to another

Generally speaking, the life of a roller chain is limited by three main factors: wear, corrosion, and fatigue. These can be minimized by following some simple guidelines. For optimum performance, the roller chain must be lubricated. Proper lubrication reduces friction and extends product life. Remember that corrosion and wind resistance can adversely affect lubrication, so protect the product properly.
A chain is a mechanical device used to transmit power from one shaft to another. The chain consists of a series of steel plates called bushings. Bushings are attached to the roller chain by pins or bushings. The block and bushing are held together by pins or bushings C riveted to the outer link D. The chain is also attached to the sprocket and bucket by pins or hooks. Chain pitch is measured between hinge centers, usually denoted p.
There are three types of chains: single-strand standard series, multi-strand standard series, and silent chain. Single strand chains are the most common type and cover a wide range of drive loads. Multi-strand chains provide greater power capacity without increasing chain pitch or line speed. An inverted tooth chain is a variant of a single-strand chain that eliminates the noise caused by pitch-related friction.
The inner and outer plates of the roller chain drive are made of steel. The rollers are positioned evenly between the chain links and are fastened to the sprockets. In addition, the rollers can rotate freely within the bushing. The chain links are arc-shaped and mesh with the sprocket teeth to transmit power through the chain.
Chain drives are another common way of transmitting mechanical power. These are the simplest forms of power transmission and are used on conveyor belts and other low-speed applications. The chain wraps around the sprocket and passes through the sprocket whose teeth mesh with the links. This mechanism transfers mechanical power from one shaft to another, increasing speed.

They are interchangeable

There are many different types of roller chains, but most are made of steel. Although they have their own advantages and features, they are generally interchangeable. You can buy different kinds of roller chains from domestic and foreign manufacturers, and you can choose the one that best suits your needs. Bearing Services can help you choose the right bearing for your application needs and budget. Here are some important things to consider before buying a roller chain. Here are some tips to make it easier for you to buy the right type of chain.
When choosing the right roller chain, be sure to consult the available size charts. Depends on how much chain you need to move the load you need to move. Remember that roller chains can be manufactured to fit a variety of machines and must meet your specific needs. Also, the chain should be long enough for the machine you are using. Make sure to buy a chain made of high-quality materials.
Double pitch roller chains have a flat top surface and are used in many different conveying applications. Double-pitch load-carrying roller chains, also known as oversized roller double-pitch chains, have rollers that extend beyond the sidebars to carry products. Double pitch drive series roller chains are used in elevators, long conveyor drives, agricultural machinery, and commercial sprinkler systems.
The tensile strength of a roller chain is a key factor to consider before purchasing a chain. The tensile strength of a chain is a function of the maximum force the chain can withstand before breaking. The three different types of tensile strength represent the force a chain can withstand without breaking. Each chain also has different strengths that can determine the type of chain you need.
The outer and inner links of the roller chain are designed for bearings. This allows the chain to be paired or unpaired with its internal links. The outer link has a pin, and the inner and outer pins are press-fit into the connecting plate. These links are usually made of steel and have a tensile strength of about 20 times their weight. The fatigue strength of two-pitch offset links is the same as that of the base chain.

They reduce wear with internal lubricants

In a roller chain, the pins and bushings rotate inside the chain without lubricant on the outside. They are in contact with the teeth of the sprocket and can easily wear out if not lubricated. The plates that connect the links and pivot about the pins can also rub against each other and cause wear. This is where lubricants come in handy. Without lubricant, the bare metal of the plate and bushing would rub against each other.
The lubricant should have the appropriate viscosity to penetrate critical internal surfaces and form an effective oil film. Recommended viscosities are listed in Table 1. Lubricants must be clean and non-corrosive. For roller chains, a good quality non-clean petroleum base oil is sufficient. While defoamers are not required, other additives such as antioxidants and extreme pressure inhibitors may be useful. However, impure oils should be avoided due to the risk of damage.
The shape of the spray head 10 overlaps with a conventional drive chain 12. The drive chain includes a plurality of rollers 24 and roller link plates 26. Each roller includes a roller pin 29 and is connected to a pair of pin link plates 28. Most drive chains have critical wear points on the sides of the roller pins 29. The shape of the spray head 10 prevents overspray onto the central portion of the roller.
In addition to preventing wear, these chains have unique specifications. Manufacturer CZPT requires raw material suppliers to certify that their products meet standards set by the American Society of Mechanical Engineers (ASME). CZPTs do not accept uncertified raw materials. For safety, the machine must be turned off before attempting to measure the chain. After the system is shut down, the measurement process should be completed in accordance with safety procedures.
General spray oil has lubricating properties, but is not as good as other types of chain lubricants. These are typically used for rust protection and include antioxidant chemicals. Generally, they are inexpensive and widely available in retail stores. However, they have the disadvantage of being very penetrating and difficult to apply evenly. Oil cannot stay on the chain as it spins, which can accelerate wear and corrosion.
chain

They can be used to speed up or slow down machines

Typically, roller chains are chains used to move mechanical system components. Unlike belts, roller chains can be used to speed up or slow down a machine. The main difference between belts and roller chains is the lubrication process. Belts use lubrication to help them move at a constant speed, but should not exceed the critical speed of the roller chain. This critical speed is not easy to determine and lubrication is critical to its life.
A roller chain is a chain consisting of a steel bushing that holds the inner plate A and pins C together. Pin C is riveted to outer link D, while roller R surrounds each bushing B. The teeth of the sprocket are supported on the rollers. They spin freely on pins and bushings, reducing friction.
The chains can be single-stranded, double-stranded, or multi-stranded. The rated power capacity of the single strand chain can meet various drive load requirements. Multi-strand chains provide higher power capacity without increasing chain pitch or line speed. The silent chain, also known as the inverted tooth chain, consists of a series of toothed chainplates. The pins of the chain are pressed into the wide ends of the sidebars and outer links.
Although roller chains are a common mechanical component, they can fail under certain conditions. The most common cause of excessive wear is wrong to load sizing. Each manufacturer sets a maximum workload for its product. A chain that is too small for the load carried will not run smoothly and may cause premature failure. Chains can also fail due to rust or improper maintenance.
There are many ways to choose the correct size roller chain. The easiest way to choose the right one is to use a horsepower chart to determine the speed of the motor. RPM will determine the size of the chain and the number of teeth on the drive sprocket. Conveyor chains offer a variety of options to move products horizontally or vertically, even around bend radii.

China Good quality ISO ANSI DIN Stainless Steel Short Double Pitch Transmission Conveyor Agricultural Drop Forged Hollow Pin Flat Top Leaf Motorcycle Steel Roller Chain   with Great qualityChina Good quality ISO ANSI DIN Stainless Steel Short Double Pitch Transmission Conveyor Agricultural Drop Forged Hollow Pin Flat Top Leaf Motorcycle Steel Roller Chain   with Great quality
editor by CX 2023-04-19

China OEM Plastic Conveyor Chain Conveyor Mine Machinery CZPT Machines Long Pitch Flat Top Table Car Parking Drag Sharp Paver Forging Scraper Trencher CZPT Chain near me shop

Product Description

Plastic conveyor chain Conveyor Mine Machinery CZPT Equipment lengthy pitch Flat Leading table Automobile parking Drag Sharp paver forging scraper Trencher CZPT chain

This type of chain is used in the initial stages of energy transmission improvement. When the sprocket moves closer to or away from the tooth, sounds is produced as the enamel rub in opposition to the connecting rod. These varieties of chains are employed to some extent for low-pace conveyor chains.
This sort of chain is employed in the preliminary phases of electricity transmission improvement. When the sprocket moves nearer to or absent from the enamel, sound is created as the tooth rub against the connecting rod. These types of chains are utilized to some extent for low-pace conveyor chains.

China OEM Plastic Conveyor Chain Conveyor Mine Machinery CZPT Machines Long Pitch Flat Top Table Car Parking Drag Sharp Paver Forging Scraper Trencher CZPT Chain     near me shop

China Chain and sprocket factory : Hairise fenner roller chain China in Al-Mahallah al-Kubra Egypt Flat Top Chain Food Grade Material Conveyor System with ce certificate top quality low price

China Chain and sprocket factory : Hairise fenner roller chain China in Al-Mahallah al-Kubra Egypt  Flat Top Chain Food Grade Material Conveyor System with ce certificate top quality low price

We – EPG Group the biggest Chain and agricultural gearbox manufacturing unit in China with 5 different branches. For far more information: Cell/whatsapp/telegram/Kakao us at: 0086-13083988828

Furthermore, all our production methods are in compliance with ISO9002 standards for a specialized supplier of a full range of chains, sprockets, gears, equipment racks, V-belts, couplings and reducers, pto shaft, agricultural gearboxes….ISO Our items are made by modern computerized machinery and gear.a specialized provider of a entire selection of chains, sprockets, gears, gear racks, V-belts, couplings and reducers, pto shaft, agricultural gearboxes….9001 certified producer of precision roller chains. Types contain solitary and multiple strand, hollow pin, side bow, rollerless, self-lubricating, straight sidebar, double pitch, brushed, nickel plated, armor coated, 304 stainless metal, leaf, hoist and O-ring, citrus, sorting and caterpillar roller chains. 1 element of our application consulting is that we have been amassing and combining the expertise in chain and sprocket purposes in various places for a long time. This is particularly intriguing for us every time clients method us with some exceeding and demanding specifications. Firm Data:                                                                                                      

Mu Jia EPT Engineering(ZheJiang ) Co. Ltd.

Mu-Jia is an integrated company engaged in the R&D, manufacture and sale of slat best chain,modular belt,conveyor system and EPT associated factors almo EPT 20 a long time. Insisting on the procedure principle of “Good quality Based mostly and Service Very first”, our firm has received a large status through a lot of many years of growth. We also cooperate with some well-known domestic and overseas enterprises.

Our head office located in ZheJiang ,new factory found in ZheJiang province,addresses an places of 15,000 square meter,there are a few main properties:workplace creating,conveyor assembly workshop and production workshop.More than 10 equipment for generating,several hundreds of product manner EPT for assembly buyer selection demands.Our principal products are modular belt,slat best chain,adaptable chain,conveyor program,comb,rail,sprocket and EPT conveyor associated elements.They are widely employed in meals, gentle consume, packaging & production, tobacco, medicine & chemical, electronics, Car: +86~13083988828s and logistics industries.

Solution Data:                                                                                                          

EPT EPT System Description

Modular belt conveyor is broadly employed in foodstuff&beverage industry.Roller conveyor is suited for transport of crates,containers,pallets,or cardboard packaging in areas. Our belt use POM/PP/PU/PVC resources, so our merchandise are dress in resistant and resistant to warmth and so on. They are mainly utilised in the following factors:

In beverage industry palletizes,depolarizers,washers,labelers,fillers,pasteurizers,incliners,out feeds,elevators and accumulation tables are outfitted with slat band chains, curves, sprockets, belts, leveling aspects and numerous more conveyor factors.

For the container production sector particular items and materia EPT are offered, these kinds of as abrasion resistant polyamide for glass crops, vacuum chains for can generating and gripper chains for vertical transportation.

In automotive industry the merchandise are engineered to meet the mo EPT demanding apps, this kind of as rubber processing and tire dealing with.

The detailed size can be accessible as your need, thus as long as you give me the drawing or detailed specification, every little thing is ok. So Mu-Jia has the goods to match any buyer necessity.

Characteristics and Positive aspects:

one) Lower friction
2)Higher performance
3)StHangZhourd width and custom-made size
4)Personalized coloration
5)A variety of kinds match distinct chain conveyor line
6)Simple upkeep
7)High speed with massive conveying capacity
 

Products Parameters:                                                                                                             
 

Belt composition Modular belt 
Belt material POM/PP
Frame content Stainless Steel/Carbon steel/Aluminum alloy
Voltage 220V/380V
Electricity .5~2.2Kw
Speed Consistent velocity/adjustable speed (Cost of conveyor with adjustable pace is a little greater than which is continuous speed.)
Load potential In accordance to your necessity
Dimension As needed or we determine according to your offered operating spot size
Motor brand Euro Brand name, China Brand name
Lead time 20-35 days following thirty% deposit is acquired
Deal Wooden case
Brand Hairise

Certification:                                                                                                                           

Bundle:                                                                                                                                  

Our Principal Goods:                                                                                                                  

Exhibition:                                                                                                                               

 

The use of authentic equipment manufacturer’s (OEM) component quantities or emblems , e.g. CASE® and John Deere® are for reference purposes only and for indicating item use and compatibility. Our firm and the outlined substitute elements contained herein are not sponsored, accepted, or manufactured by the OEM.

China Chain and sprocket factory : Hairise fenner roller chain China in Al-Mahallah al-Kubra Egypt  Flat Top Chain Food Grade Material Conveyor System with ce certificate top quality low price

China Chain and sprocket factory : Hairise fenner roller chain China in Al-Mahallah al-Kubra Egypt  Flat Top Chain Food Grade Material Conveyor System with ce certificate top quality low price

China Chain and sprocket factory : Hairise fenner roller chain China in Al-Mahallah al-Kubra Egypt  Flat Top Chain Food Grade Material Conveyor System with ce certificate top quality low price

China Chain and sprocket factory : Hairise fenner roller chain China in Al-Mahallah al-Kubra Egypt  Flat Top Chain Food Grade Material Conveyor System with ce certificate top quality low price