This gage checks the wear-elongation of chains.
Examine the chain elongation at a portion that is most
regularly engaged together with the sprockets (portion more than likely to become worn).
When the center of 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 can be most
frequently engaged using the sprockets (portion probably to be worn).
When the center with the pin of your chain to be measured reaches the arrow stage, it signifies that the chain has become critically elongated. In this case, replace the chain.
Use the gage to check the put on elongation of the chain.
Standard terms for sprockets
Nominal quantity of sprockets
The nominal number of a sprocket is the identical as the nominal number of the corresponding chain. As an example, Chains such as 50, 50HK, and 50LD can be engaged having a 
sprocket 50. It can be followed by symbols and characters indicating the quantity of chain strands, the number of sprocket teeth, hub sort, tooth head hardening, and so forth.
Diameter of prepared hole and shaft hole finishing
A common sprocket for a single strand or double strand chain includes a shaft hole prepared at a diameter stated while in the table of dimensions. When 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 have to be tough and put on resistant as they are impacted when engaged with all the rollers on the chain and worn by sliding with all the rollers. When significant wear and huge shocks are anticipated, sprocket.
Sorts, building and elements
made of carbon steel or cast steel should be applied and high-frequency hardening really should be performed.
The normal sprockets forty to 120 which has a hub on just one side for single and double strand chains are induction-hardened even when the number of teeth is little. Whether or not the solution is induction hardened or not is shown within the tables of dimensions of respective sprockets for the reference. Additionally, within the following cases, induction-harden the teeth in the sprocket.?The little sprocket has 20 or less teeth and it is utilized at 1/6 or additional with the optimum speed stated while in the table of optimum kilowatt ratings.
The little sprocket is utilised at a adjust gear ratio of 4:1 or more.
The small sprocket is utilised for any low pace significant load transmission as in circumstances of selection depending on the “Low-speed selection”.
Sprockets are utilized in situations exactly where the teeth are heavily worn.
Sprockets are utilized beneath problems wherever you can find regular commences and stops or sudden frequent or reverse rotations.
General cautions
For picking the amount of teeth and velocity ration of your sprocket, see “How to select suitable chain” . For cautions for installing a sprocket on the shaft and replacement timing, see “Installation adjustment maintenance” .
