This gage checks the wear-elongation of chains.
Test the chain elongation at a portion which is most
commonly engaged using the sprockets (portion almost certainly for being worn).
When the center of your pin of your chain to become measured
This gage checks the wear-elongation of chains.
Test the chain elongation at a portion and that is most
often engaged using the sprockets (portion more than likely to be worn).
Once the center on the pin of the chain for being measured reaches the arrow stage, it means that the chain is critically elongated. In this case, substitute the chain.
Utilize the gage to verify the dress in elongation of your chain.
Standard terms for sprockets
Nominal quantity of sprockets
The nominal number of a sprocket would be the same because the nominal quantity of the corresponding chain. For instance, Chains this kind of as 50, 50HK, and 50LD is usually engaged with a sprocket 50. It truly is followed by symbols and characters indicating the number of chain strands, the amount of sprocket teeth, hub style, tooth head hardening, and so forth.
Diameter of prepared hole and shaft hole finishing
A normal sprocket for a single strand or double strand chain features a shaft hole ready at a diameter stated from the table of dimensions. If you finish the shaft hole, machine it in reference to the outer diameter or root diameter.
Hardening of tooth heads
The teeth of a sprocket should be difficult and put on resistant because they are impacted when engaged together with the rollers of the chain and worn by sliding with all the rollers. When significant dress in and big shocks are anticipated, sprocket.
Kinds, building and supplies
manufactured from carbon steel or cast steel should really be applied and high-frequency hardening need to be conducted.
The regular sprockets forty to 120 with a hub on only one side for single and double strand chains are induction-hardened even though the amount of teeth is small. Regardless of whether the products is induction hardened or not is proven inside the tables of dimensions of respective sprockets for the reference. Additionally, inside the following situations, induction-harden the teeth from the sprocket.?The smaller sprocket has 20 or much less teeth and is employed at 1/6 or much more on the optimum velocity stated inside the table of highest kilowatt ratings.
The smaller sprocket is utilised at a transform gear ratio of 4:1 or far more.
The modest sprocket is applied for a low velocity substantial load transmission as in 
circumstances of variety dependant on the “Low-speed selection”.
Sprockets are used in conditions in which the teeth are heavily worn.
Sprockets are employed below situations in which there are frequent begins and stops or sudden common or reverse rotations.
Common cautions
For choosing the amount of teeth and pace ration in the sprocket, see “How to select right chain” . For cautions for installing a sprocket on the shaft and substitute timing, see “Installation adjustment maintenance” .
