This gage checks the wear-elongation of chains.
Examine the chain elongation at a portion that is most
usually engaged with all the sprockets (portion probably for being worn).
Once the center on the pin on the chain to become measured
This gage checks the wear-elongation of chains.
Test the chain elongation at a portion which can be most
commonly engaged with the sprockets (portion probably to be worn).
When the center from the pin from the chain for being measured reaches the arrow stage, it implies that the chain continues to be critically elongated. In this instance, substitute the chain.
Use the gage to examine the dress in elongation of your chain.
General terms for sprockets
Nominal number of sprockets
The nominal quantity of a sprocket would be the same as the nominal number of the corresponding chain. As an example, Chains such as 50, 50HK, and 50LD is usually engaged having a sprocket 50. It truly is followed by symbols and characters indicating the quantity of chain strands, the number of sprocket teeth, hub kind, tooth head hardening, and so forth.
Diameter of ready hole and shaft hole finishing
A typical sprocket for any single strand or double strand chain includes a shaft hole ready at a diameter stated while in the table of dimensions. Once you finish the shaft hole, machine it in reference for the outer diameter or root diameter.
Hardening of tooth heads
The teeth of a sprocket has to be difficult and dress in resistant because they are impacted when engaged together with the rollers on the chain and worn by sliding with the rollers. When serious wear and significant shocks are anticipated, sprocket.
Sorts, building and materials
made from carbon steel or cast steel really should be made use of and high-frequency hardening should be performed.
The typical sprockets forty to 120 having a hub on just one side for single and double strand chains are induction-hardened even when the number of teeth is smaller. Regardless of whether the product or service is induction hardened or not is shown while in the tables of dimensions of respective sprockets for your reference. In addition, from the following situations, induction-harden the teeth of the sprocket.?The compact sprocket has 20 or significantly less teeth and is used at 1/6 or more from the highest velocity stated within the table of maximum kilowatt ratings.
The little sprocket is applied at a adjust gear ratio of 4:1 or extra.
The little sprocket is employed to get a reduced velocity large load transmission as in cases of selection based on the “Low-speed selection”.
Sprockets are utilized in conditions wherever the teeth are heavily worn.
Sprockets are employed beneath ailments wherever there are frequent commences and stops or sudden typical or reverse rotations.
Basic cautions
For picking the number of teeth and velocity ration of your sprocket, see “How to select good chain” . For cautions for installing a sprocket on a shaft and replacement timing, see “Installation adjustment maintenance” .