This gage checks the wear-elongation of chains.
Test the chain elongation at a portion which is most
often engaged together with the sprockets (portion probably to get worn).
When the center on the pin of the chain for being measured
This 
gage checks the wear-elongation of chains.
Test the chain elongation at a portion that’s most
frequently engaged together with the sprockets (portion most likely to get worn).
When the center from the pin from the chain to become measured reaches the arrow level, it means that the chain has been critically elongated. In this case, change the chain.
Utilize the gage to check out the wear elongation of your chain.
Standard terms for sprockets
Nominal number of sprockets
The nominal quantity of a sprocket would be the exact same since the nominal amount of the corresponding chain. Such as, Chains this kind of as 50, 50HK, and 50LD is usually engaged that has a sprocket 50. It can be followed by symbols and characters indicating the quantity of chain strands, the number of sprocket teeth, hub form, tooth head hardening, and so forth.
Diameter of prepared hole and shaft hole finishing
A conventional sprocket for any single strand or double strand chain includes a shaft hole prepared at a diameter stated from the table of dimensions. Once you finish the shaft hole, machine it in reference towards the outer diameter or root diameter.
Hardening of tooth heads
The teeth of a sprocket need to be tough and wear resistant because they are impacted when engaged with the rollers from the chain and worn by sliding together with the rollers. When significant dress in and substantial shocks are anticipated, sprocket.
Kinds, building and resources
made of carbon steel or cast steel need to be utilized and high-frequency hardening need to be carried out.
The regular sprockets forty to 120 which has a hub on just one side for single and double strand chains are induction-hardened even if the number of teeth is modest. Whether or not the solution is induction hardened or not is proven inside the tables of dimensions of respective sprockets to your reference. Furthermore, in the following circumstances, induction-harden the teeth in the sprocket.?The smaller sprocket has 20 or significantly less teeth and is utilised at 1/6 or much more in the greatest velocity stated from the table of optimum kilowatt ratings.
The little sprocket is utilized at a change gear ratio of 4:1 or extra.
The small sprocket is utilised for a very low speed big load transmission as in instances of selection determined by the “Low-speed selection”.
Sprockets are used in conditions in which the teeth are heavily worn.
Sprockets are employed under problems exactly where there are frequent begins and stops or sudden normal or reverse rotations.
Common cautions
For selecting the quantity of teeth and speed ration with the sprocket, see “How to pick correct chain” . For cautions for putting in a sprocket on a shaft and substitute timing, see “Installation adjustment maintenance” .
