This gage checks the wear-elongation of chains.
Test the chain elongation at a portion that is most
commonly engaged with the sprockets (portion probably to be worn).
When the center with the pin with the chain to be measured
This gage checks the wear-elongation of chains.
Verify the chain elongation at a portion that is most
commonly engaged using the sprockets (portion most likely to become worn).
Once the center of the pin in the chain for being measured reaches the arrow stage, it means that the chain has become critically elongated. In this instance, exchange the chain.
Use the gage to check out the put on elongation of the chain.
Common terms for sprockets
Nominal amount of sprockets
The nominal variety of a sprocket is definitely the similar since the nominal amount of the corresponding chain. For instance, Chains this kind of as 50, 50HK, and 50LD could be engaged with a sprocket 50. It is followed by symbols and characters indicating the quantity of chain strands, the number of sprocket teeth, hub type, 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 has a shaft hole ready at a diameter stated inside the table of dimensions. When you finish the shaft hole, machine it in reference for the outer diameter or root diameter.
Hardening of tooth heads
The teeth of the sprocket needs to be hard and dress in resistant because they are impacted when engaged together with the rollers from the chain and worn by sliding with the rollers. When significant 
dress in and big shocks are anticipated, sprocket.
Types, building and materials
made from carbon steel or cast steel need to be utilised and high-frequency hardening really should be carried out.
The standard sprockets forty to 120 by using a hub on just one side for single and double strand chains are induction-hardened whether or not the quantity of teeth is tiny. No matter if the product is induction hardened or not is shown from the tables of dimensions of respective sprockets to your reference. In addition, in the following instances, induction-harden the teeth from the sprocket.?The little sprocket has 20 or less teeth and it is used at 1/6 or far more of your greatest speed stated within the table of optimum kilowatt ratings.
The small sprocket is utilised at a transform gear ratio of four:1 or more.
The small sprocket is utilised for a low pace massive load transmission as in cases of choice based on the “Low-speed selection”.
Sprockets are utilized in situations the place the teeth are heavily worn.
Sprockets are applied below disorders exactly where there are actually frequent begins and stops or sudden regular or reverse rotations.
Common cautions
For selecting the amount of teeth and pace ration of your sprocket, see “How to select right chain” . For cautions for putting in a sprocket on the shaft and substitute timing, see “Installation adjustment maintenance” .
