Product Description
Double Pitch Conveyor Chains
| ISO Chain No. | Pitch P mm |
Roller diameter d1max mm |
Width between inner plates b1min mm |
Pin diameter d2 max mm |
Pin length | Inner plate depth h2 max mm |
Plate thickness T max mm |
Tensile strength Q min kN/lbf |
Average tensile strength Q0 kN |
Weight per meter q kg/m |
|
| Lmax mm | Lcmax mm | ||||||||||
| C210B | 31.75 | 10.16 | 9.65 | 5.08 | 19.5 | 20.9 | 14.7 | 1.7 | 22.4/5036 | 24.6 | 0.75 |
| C210BL | 19.05 | 1.21 | |||||||||
CONVEYOR CHAIN DESIGNED AND MANUFACTURED FOR THE MOST DEMXIHU (WEST LAKE) DIS. OF ENVIRONMENTS
HangZhou Star Machine Technology Co.,ltd. provides the highest quality materials and manufacturing methods to suit the most arduous of conveyor chain applications – from the transport of biomass fuels, to the recycling industry, paper & pulp, cement, steel-work, the wood industry and food processing.
Our conveyor chains, sprocket wheels and attachments are case-hardened to achieve the optimum balance between strength, durability and resistance to wear.
Our manufacturing is focused on metric pitch conveyor chains that include:
International Standards DIN 8167/ISO 1977 M series
DIN 8165/ISO 1977 FV series
SMS 1968 S series
CONSTRUCTION OF THE CHAIN
Two different sizes of roller chain, showing construction.
There are 2 types of links alternating in the bush roller chain. The first type is inner links, having 2 inner plates held together by 2 sleeves or bushings CHINAMFG which rotate 2 rollers. Inner links alternate with the second type, the outer links, consisting of 2 outer plates held together by pins passing through the bushings of the inner links. The “bushingless” roller chain is similar in operation though not in construction; instead of separate bushings or sleeves holding the inner plates together, the plate has a tube stamped into it protruding from the hole which serves the same purpose. This has the advantage of removing 1 step in assembly of the chain.
VARIANTS DESIGN
Layout of a roller chain: 1. Outer plate, 2. Inner plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not being used for a high wear application (for instance if it is just transmitting motion from a hand-operated lever to a control shaft on a machine, or a sliding door on an oven), then 1 of the simpler types of chain may still be used. Conversely, where extra strength but the smooth drive of a smaller pitch is required, the chain may be “siamesed”; instead of just 2 rows of plates on the outer sides of the chain, there may be 3 (“duplex”), 4 (“triplex”), or more rows of plates running parallel, with bushings and rollers between each adjacent pair, and the same number of rows of teeth running in parallel on the sprockets to match. Timing chains on automotive engines, for example, typically have multiple rows of plates called strands.
USE
An example of 2 ‘ghost’ sprockets tensioning a triplex roller chain system
Roller chains are used in low- to mid-speed drives at around 600 to 800 feet per minute; however, at higher speeds, around 2,000 to 3,000 feet per minute, V-belts are normally used due to wear and noise issues.
A bicycle chain is a form of roller chain. Bicycle chains may have a master link, or may require a chain tool for removal and installation. A similar but larger and thus stronger chain is used on most motorcycles although it is sometimes replaced by either a toothed belt or a shaft drive, which offer lower noise level and fewer maintenance requirements.
The great majority of automobile engines use roller chains to drive the camshaft(s). Very high performance engines often use gear drive, and starting in the early 1960s toothed belts were used by some manufacturers.
Chains are also used in forklifts using hydraulic rams as a pulley to raise and lower the carriage; however, these chains are not considered roller chains, but are classified as lift or leaf chains.
Chainsaw cutting chains superficially resemble roller chains but are more closely related to leaf chains. They are driven by projecting drive links which also serve to locate the chain CHINAMFG the bar.
Sea Harrier FA.2 ZA195 front (cold) vector thrust nozzle – the nozzle is rotated by a chain drive from an air motor
A perhaps unusual use of a pair of motorcycle chains is in the Harrier Jump Jet, where a chain drive from an air motor is used to rotate the movable engine nozzles, allowing them to be pointed downwards for hovering flight, or to the rear for normal CHINAMFG flight, a system known as Thrust
WEAR
The effect of wear on a roller chain is to increase the pitch (spacing of the links), causing the chain to grow longer. Note that this is due to wear at the pivoting pins and bushes, not from actual stretching of the metal (as does happen to some flexible steel components such as the hand-brake cable of a motor vehicle).
With modern chains it is unusual for a chain (other than that of a bicycle) to wear until it breaks, since a worn chain leads to the rapid onset of wear on the teeth of the sprockets, with ultimate failure being the loss of all the teeth on the sprocket. The sprockets (in particular the smaller of the two) suffer a grinding motion that puts a characteristic hook shape into the driven face of the teeth. (This effect is made worse by a chain improperly tensioned, but is unavoidable no matter what care is taken). The worn teeth (and chain) no longer provides smooth transmission of power and this may become evident from the noise, the vibration or (in car engines using a timing chain) the variation in ignition timing seen with a timing light. Both sprockets and chain should be replaced in these cases, since a new chain on worn sprockets will not last long. However, in less severe cases it may be possible to save the larger of the 2 sprockets, since it is always the smaller 1 that suffers the most wear. Only in very light-weight applications such as a bicycle, or in extreme cases of improper tension, will the chain normally jump off the sprockets.
In industry, it is usual to monitor the movement of the chain tensioner (whether manual or automatic) or the exact length of a drive chain (one rule of thumb is to replace a roller chain which has elongated 3% on an adjustable drive or 1.5% on a fixed-center drive). A simpler method, particularly suitable for the cycle or motorcycle user, is to attempt to pull the chain away from the larger of the 2 sprockets, whilst ensuring the chain is taut. Any significant movement (e.g. making it possible to see through a gap) probably indicates a chain worn up to and beyond the limit. Sprocket damage will result if the problem is ignored. Sprocket wear cancels this effect, and may mask chain wear.
CHAIN STRENGTH
The most common measure of roller chain’s strength is tensile strength. Tensile strength represents how much load a chain can withstand under a one-time load before breaking. Just as important as tensile strength is a chain’s fatigue strength. The critical factors in a chain’s fatigue strength is the quality of steel used to manufacture the chain, the heat treatment of the chain components, the quality of the pitch hole fabrication of the linkplates, and the type of shot plus the intensity of shot peen coverage on the linkplates. Other factors can include the thickness of the linkplates and the design (contour) of the linkplates. The rule of thumb for roller chain operating on a continuous drive is for the chain load to not exceed a mere 1/6 or 1/9 of the chain’s tensile strength, depending on the type of master links used (press-fit vs. slip-fit)[citation needed]. Roller chains operating on a continuous drive beyond these thresholds can and typically do fail prematurely via linkplate fatigue failure.
The standard minimum ultimate strength of the ANSI 29.1 steel chain is 12,500 x (pitch, in inches)2. X-ring and O-Ring chains greatly decrease wear by means of internal lubricants, increasing chain life. The internal lubrication is inserted by means of a vacuum when riveting the chain together.
CHAIN STHangZhouRDS
Standards organizations (such as ANSI and ISO) maintain standards for design, dimensions, and interchangeability of transmission chains. For example, the following Table shows data from ANSI standard B29.1-2011 (Precision Power Transmission Roller Chains, Attachments, and Sprockets) developed by the American Society of Mechanical Engineers (ASME). See the references for additonal information.
ASME/ANSI B29.1-2011 Roller Chain Standard SizesSizePitchMaximum Roller DiameterMinimum Ultimate Tensile StrengthMeasuring Load25.
For mnemonic purposes, below is another presentation of key dimensions from the same standard, expressed in fractions of an inch (which was part of the thinking behind the choice of preferred numbers in the ANSI standard):
WHY CHOOSE US
1. Reliable Quality Assurance System
2. Cutting-Edge Computer-Controlled CNC Machines
3. Bespoke Solutions from Highly Experienced Specialists
4. Customization and OEM Available for Specific Application
5. Extensive Inventory of Spare Parts and Accessories
6. Well-Developed CHINAMFG Marketing Network
7. Efficient After-Sale Service System
We are not just a manufacturer and supplier, but also an industry consultant. We work pro-actively with you to offer expert advice and product recommendations in order to end up with a most cost effective product available for your specific application. The clients we serve CHINAMFG range from end users to distributors and OEMs. Our OEM replacements can be substituted wherever necessary and suitable for both repair and new assemblies.
| Standard or Nonstandard: | Standard |
|---|---|
| Application: | Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Electric Cars, Motorcycle, Food Machinery, Marine, Mining Equipment, Agricultural Machinery, Car, Food and Beverage Industry, Motorcycle Parts |
| Surface Treatment: | Polishing, Polishing |
| Structure: | Roller Chain, Roller Chain |
| Material: | Alloy, Alloy |
| Type: | Double Pitch Chain |
| Samples: |
US$ 0/Meter
1 Meter(Min.Order) | |
|---|
| Customization: |
Available
| Customized Request |
|---|
What are the design considerations for a gear chain system?
Designing a gear chain system requires careful consideration of several factors to ensure optimal performance and reliability. Here are the key design considerations:
1. Load and torque requirements:
– Determine the maximum load and torque that the gear chain system will need to transmit. This will dictate the size and strength of the gears and chains selected.
2. Speed and power requirements:
– Consider the desired operating speed and power output of the gear chain system. This will influence the gear ratio selection and the size of the gears and chains to handle the required power.
3. Space constraints:
– Evaluate the available space for the gear chain system. Consider the dimensions of the gears, chains, and associated components to ensure proper fit and clearance.
4. Environmental conditions:
– Assess the operating environment for factors such as temperature, humidity, dust, and corrosive elements. Select materials and coatings for the gears and chains that can withstand the specific environmental conditions.
5. Lubrication requirements:
– Determine the lubrication method and frequency needed to maintain proper lubrication of the gear chain system. Consider factors such as speed, load, temperature, and the type of lubricant required.
6. Maintenance and accessibility:
– Consider the ease of maintenance and accessibility for inspection, lubrication, and potential repairs. Design the gear chain system to allow for convenient maintenance procedures.
7. Noise and vibration:
– Evaluate the noise and vibration levels produced by the gear chain system. Take measures to minimize noise and vibration through proper gear and chain selection, alignment, and damping techniques.
8. Safety considerations:
– Ensure that the gear chain system is designed with adequate safety features to prevent accidents or injuries. Consider aspects such as guarding, emergency stops, and proper labeling.
By carefully considering these design factors, you can develop a gear chain system that meets the specific requirements of your application and delivers reliable and efficient performance.
What lubrication is recommended for a gear chain?
Proper lubrication is essential for the smooth and efficient operation of a gear chain. The lubricant used for a gear chain should have certain properties to ensure optimal performance and longevity. The following factors should be considered when selecting a lubricant for a gear chain:
1. Viscosity: The lubricant should have the appropriate viscosity to provide sufficient film thickness between the gear teeth and minimize friction and wear. The viscosity should be selected based on the operating conditions, such as speed, temperature, and load.
2. Extreme pressure (EP) additives: Gear chains often operate under high loads and pressures. The lubricant should contain EP additives that provide enhanced protection against metal-to-metal contact and prevent gear tooth damage.
3. Anti-wear properties: The lubricant should have excellent anti-wear properties to minimize wear on gear teeth and extend the chain’s service life. It should form a protective film on the surfaces to reduce friction and prevent metal-to-metal contact.
4. Corrosion protection: Gear chains may be exposed to moisture or corrosive environments. The lubricant should offer good corrosion protection to prevent rust and corrosion on the gear surfaces and chain components.
5. Compatibility: The lubricant should be compatible with the materials used in the gear chain, such as metals, plastics, or elastomers. It should not cause any adverse chemical reactions or damage to the chain components.
It is recommended to consult the gear chain manufacturer or a lubrication specialist to determine the specific lubricant requirements for your gear chain system. They can provide guidance on selecting the right lubricant based on the operating conditions, application requirements, and the type of gear chain used.
What are the different types of gear chains available?
There are several different types of gear chains available, each designed for specific applications and operating conditions. Here are some commonly used types:
– Roller Chains: Roller chains are one of the most common types of gear chains. They consist of rollers that engage with the teeth of the sprockets, providing smooth and efficient power transmission. Roller chains are widely used in various industries and applications, including automotive, industrial machinery, and agricultural equipment.
– Silent Chains: Silent chains, also known as inverted-tooth chains, are designed to minimize noise and vibration during operation. They feature specialized tooth profiles that engage with the sprockets without impact, resulting in quieter and smoother operation. Silent chains are commonly used in power transmission applications where noise reduction is critical, such as in automotive engines and precision machinery.
– Leaf Chains: Leaf chains are made up of interconnected links that resemble leaves, hence the name. They are known for their high tensile strength and are commonly used in applications requiring heavy-duty lifting or tensioning, such as forklifts, cranes, and hoists.
– PIV Chains: PIV (Parallel Indexing and Versatility) chains are specifically designed for parallel indexing applications, where precise motion control and accurate positioning are required. These chains have specialized tooth profiles that allow for smooth and precise movement, making them suitable for applications such as packaging machinery and indexing tables.
– Double-Pitch Chains: Double-pitch chains have a longer pitch than standard roller chains, which makes them ideal for applications that require slower speeds and lighter loads. They are commonly used in conveyor systems, agricultural equipment, and material handling applications.
– Accumulation Chains: Accumulation chains are designed for applications where product accumulation or indexing is required. These chains feature special attachments or profiles that allow for controlled movement and accumulation of products on the conveyor. They are often used in assembly lines, packaging systems, and material handling applications.
– Timing Chains: Timing chains are used in engines and precision machinery to synchronize the rotation of the crankshaft and camshaft. These chains feature precise tooth profiles and are designed to withstand high speeds and heavy loads while maintaining accurate timing.
These are just a few examples of the different types of gear chains available. The choice of the appropriate gear chain depends on the specific requirements of the application, including load capacity, speed, noise level, precision, and operating conditions.
editor by CX 2023-12-12