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Environmental requirements for roller sprockets:
Due to the complex working environment of mechanical equipment, in the selection of chain drive, it is necessary to choose the appropriate constituent materials and their hardness according to the working conditions. details as follows:
wear resistance
■ When some equipment is in operation, it is inevitable to come into contact with sundries such as sand, soil, straw particles, etc. These particles will fall into the gap between the chain sleeve and the roller and the meshing part of the roller and the sprocket, just like grinding sand Like abrasive grains, scratches will be produced on the contact surface, which will accelerate the wear of the chain and sprocket and shorten the service life. Preventive measures include:
1) Add a sealed protective cover to the transmission mechanism of the chain to prevent these debris from entering the chain transmission system.
2) Make the chain run slower and reduce the amount of engagement between the chain and the sprockets.
3) Use larger chains or multiple rows of chains to reduce the pressure (referring to the pressure between the sleeve and the roller, the pin and the sleeve).
■ If for some reason, the above three methods are not feasible, the following measures can be taken:
1) Use materials such as bearing steel or chrome-molybdenum steel to manufacture parts, and improve their wear resistance through heat treatment and hardening.
2) When the chain plates are subject to considerable wear, hardened steel can be used as the material of manufacture.
3) The wear rate of the sleeve is the largest, so its thickness can be imposed to reduce the pressure on the bearing surface, and wear-resistant steel is used as the manufacturing material.
fatigue resistance
Due to the special conditions of mechanical equipment operation, there is a high requirement for the fatigue resistance of the chain, so it can be considered to use a heavy-duty chain or multiple rows of chains to improve.
Antioxidant
For chains that are in direct contact with water (such as cleaning machine chains, rice chains, etc.), oxidation and rust will occur, resulting in gradual wear of the chain. Therefore, chains used in this environment must undergo certain anti-rust treatment measures, or use Stainless steel or other chain steel with good water resistance. In addition, it is also necessary to increase the gap between the hinge parts to prevent the deposition of rust.
Key words Double sprocket/China sprocket/08b sprocket
Name China supplier 08b 21 tooth sprocket double row sprocket
Selling price (reference price) $4.2-4.3
RMB ￥25
