This gage checks the wear-elongation of chains.
Check the chain elongation at a portion which can be most
usually engaged with all the sprockets (portion most likely to get worn).
When the center of your pin from the chain to be measured
This gage checks the wear-elongation of chains.
Check the chain elongation at a portion that is most
usually engaged together with the sprockets (portion probably to be worn).
When the center with the pin on the chain to be measured reaches the arrow point, it signifies that the chain has been critically elongated. In this case, substitute the chain.
Use the gage to test the wear elongation of your chain.
General terms for sprockets
Nominal number of sprockets
The nominal variety of a sprocket could be the similar because the nominal variety of the corresponding chain. One example is, Chains such as 50, 50HK, and 50LD can be engaged with a sprocket 50. It is actually followed by symbols and characters indicating the amount of chain strands, the quantity of sprocket teeth, hub variety, tooth head hardening, etc.
Diameter of ready hole and shaft hole finishing
A conventional sprocket to get a single strand or double strand chain includes a shaft hole prepared at a diameter stated within the table of dimensions. Whenever you finish the shaft hole, machine it in reference to your outer diameter or root diameter.
Hardening of tooth heads
The teeth of a sprocket have to be hard 
and wear resistant as they are impacted when engaged with all the rollers of the chain and worn by sliding using the rollers. When severe put on and significant shocks are anticipated, sprocket.
Varieties, development and materials
manufactured from carbon steel or cast steel must be used and high-frequency hardening must be conducted.
The normal sprockets 40 to 120 using a hub on just 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 shown during the tables of dimensions of respective sprockets for the reference. In addition, within the following instances, induction-harden the teeth on the sprocket.?The smaller sprocket has twenty or less teeth and is used at 1/6 or more from the greatest speed stated within the table of highest kilowatt ratings.
The small sprocket is used at a alter gear ratio of 4:1 or more.
The tiny sprocket is used to get a lower speed large load transmission as in circumstances of selection based on the “Low-speed selection”.
Sprockets are used in situations exactly where the teeth are heavily worn.
Sprockets are utilized underneath disorders in which you can find regular begins and stops or sudden common or reverse rotations.
Common cautions
For picking out the number of teeth and pace ration from the sprocket, see “How to select proper chain” . For cautions for installing a sprocket on a shaft and substitute timing, see “Installation adjustment maintenance” .