This gage checks the wear-elongation of chains.
Check out the chain elongation at a portion which is most
usually engaged with the sprockets (portion almost certainly to get worn).
Once the center in the pin in the chain for being measured
This 
gage checks the wear-elongation of chains.
Check out the chain elongation at a portion which is most
usually engaged together with the sprockets (portion most likely to be worn).
When the center on the pin on the chain to be measured reaches the arrow point, it means that the chain is critically elongated. In this case, exchange the chain.
Use the gage to test the dress in elongation of your chain.
Common terms for sprockets
Nominal quantity of sprockets
The nominal amount of a sprocket could be the very same since the nominal amount of the corresponding chain. By way of example, Chains such as 50, 50HK, and 50LD might be engaged with a sprocket 50. It truly is followed by symbols and characters indicating the amount of chain strands, the quantity of sprocket teeth, hub form, tooth head hardening, and so forth.
Diameter of ready hole and shaft hole finishing
A standard sprocket for any single strand or double strand chain has a shaft hole ready at a diameter stated during the table of dimensions. Any time you finish the shaft hole, machine it in reference to the outer diameter or root diameter.
Hardening of tooth heads
The teeth of the sprocket need to be challenging and wear resistant because they are impacted when engaged together with the rollers on the chain and worn by sliding using the rollers. When significant wear and massive shocks are anticipated, sprocket.
Forms, building and elements
made from carbon steel or cast steel need to be used and high-frequency hardening should really be carried out.
The typical sprockets 40 to 120 which has a hub on only one side for single and double strand chains are induction-hardened whether or not the number of teeth is tiny. Regardless of whether the merchandise is induction hardened or not is proven during the tables of dimensions of respective sprockets for the reference. Moreover, while in the following situations, induction-harden the teeth on the sprocket.?The little sprocket has twenty or significantly less teeth and is utilised at 1/6 or far more from the greatest speed stated in the table of maximum kilowatt ratings.
The little sprocket is made use of at a adjust gear ratio of four:1 or additional.
The smaller sprocket is used for a low velocity huge load transmission as in situations of variety according to the “Low-speed selection”.
Sprockets are utilized in conditions exactly where the teeth are heavily worn.
Sprockets are made use of under circumstances in which there are actually frequent commences and stops or sudden standard or reverse rotations.
General cautions
For deciding on the amount of teeth and speed ration with the sprocket, see “How to select right chain” . For cautions for putting in a sprocket on a shaft and substitute timing, see “Installation adjustment maintenance” .
