This gage checks the wear-elongation of chains.
Check the chain elongation at a portion that’s most
usually engaged with the sprockets (portion almost certainly to get worn).
When the center of the pin with the chain to get measured
This gage checks the wear-elongation of chains.
Examine the chain elongation 
at a portion which can be most
commonly engaged with the sprockets (portion probably to get worn).
When the center of your pin in the chain for being measured reaches the arrow point, it signifies that the chain has become critically elongated. In this instance, replace the chain.
Utilize the gage to verify the dress in elongation of your chain.
Common terms for sprockets
Nominal number of sprockets
The nominal quantity of a sprocket could be the same as the nominal number of the corresponding chain. As an example, Chains this kind of as 50, 50HK, and 50LD is often engaged having a sprocket 50. It really is followed by symbols and characters indicating the quantity of chain strands, the number of sprocket teeth, hub sort, tooth head hardening, and so on.
Diameter of prepared hole and shaft hole finishing
A standard sprocket for any single strand or double strand chain includes a shaft hole ready at a diameter stated in the table of dimensions. Any time you finish the shaft hole, machine it in reference to your outer diameter or root diameter.
Hardening of tooth heads
The teeth of the sprocket should be challenging and dress in resistant as they are impacted when engaged together with the rollers of your chain and worn by sliding together with the rollers. When serious dress in and huge shocks are anticipated, sprocket.
Varieties, construction and products
made of carbon steel or cast steel should be made use of and high-frequency hardening should be conducted.
The standard sprockets forty to 120 that has a hub on just one side for single and double strand chains are induction-hardened even when the amount of teeth is smaller. Whether or not the merchandise is induction hardened or not is shown while in the tables of dimensions of respective sprockets for your reference. Moreover, in the following scenarios, induction-harden the teeth of your sprocket.?The little sprocket has 20 or much less teeth and is employed at 1/6 or far more on the highest speed stated in the table of optimum kilowatt ratings.
The modest sprocket is applied at a change gear ratio of four:1 or far more.
The little sprocket is employed for any very low velocity huge load transmission as in instances of choice according to the “Low-speed selection”.
Sprockets are used in circumstances wherever the teeth are heavily worn.
Sprockets are used beneath conditions wherever there are frequent starts and stops or sudden regular or reverse rotations.
Basic cautions
For selecting the quantity of teeth and pace ration in the sprocket, see “How to select suitable chain” . For cautions for installing a sprocket on a shaft and replacement timing, see “Installation adjustment maintenance” .
