This gage checks the wear-elongation of chains.
Examine the chain elongation at a portion that’s most
regularly engaged with the sprockets (portion most likely to be worn).
When the center from the pin with the chain to get measured
This gage checks the wear-elongation of chains.
Check the chain elongation at a portion which can be most
commonly engaged together with the sprockets (portion most likely to be worn).
When the center of the pin on the chain to get measured reaches the arrow level, it implies that the chain has been critically elongated. In this case, substitute the chain.
Use the gage to check the put on elongation of one’s chain.
General terms for sprockets
Nominal quantity of sprockets
The nominal amount of a sprocket could be the exact same because the nominal variety of the corresponding chain. For instance, Chains this kind of as 50, 50HK, and 50LD may be engaged that has a 
sprocket 50. It is followed by symbols and characters indicating the amount of chain strands, the number of sprocket teeth, hub kind, tooth head hardening, etc.
Diameter of prepared hole and shaft hole finishing
A standard sprocket to get a single strand or double strand chain has a shaft hole prepared at a diameter stated while in the table of dimensions. If you finish the shaft hole, machine it in reference on the outer diameter or root diameter.
Hardening of tooth heads
The teeth of a sprocket has to be hard and put on resistant because they are impacted when engaged with the rollers of the chain and worn by sliding with all the rollers. When extreme wear and huge shocks are anticipated, sprocket.
Forms, development and elements
made from carbon steel or cast steel ought to be utilized and high-frequency hardening ought to be performed.
The standard sprockets 40 to 120 having a hub on just one side for single and double strand chains are induction-hardened even if the number of teeth is tiny. Whether or not the item is induction hardened or not is shown while in the tables of dimensions of respective sprockets for your reference. Additionally, from the following instances, induction-harden the teeth from the sprocket.?The modest sprocket has 20 or less teeth and is applied at 1/6 or a lot more from the maximum speed stated while in the table of greatest kilowatt ratings.
The small sprocket is utilised at a transform gear ratio of four:one or a lot more.
The modest sprocket is employed for a low pace huge load transmission as in scenarios of variety based upon the “Low-speed selection”.
Sprockets are utilized in conditions where the teeth are heavily worn.
Sprockets are employed below ailments wherever there are frequent starts and stops or sudden common or reverse rotations.
Standard cautions
For deciding on the quantity of teeth and speed ration from the sprocket, see “How to select right chain” . For cautions for putting in a sprocket on the shaft and substitute timing, see “Installation adjustment maintenance” .