This gage checks the wear-elongation of chains.
Test the chain elongation at a portion and that is most
usually engaged with the sprockets (portion more than likely for being worn).
Once the center of the pin with the chain to get measured
This gage checks the wear-elongation of chains.
Examine the chain elongation at a portion that is most
commonly engaged using the sprockets (portion probably to get worn).
When the center with the pin in the chain for being measured reaches the arrow point, it signifies that the chain has become critically elongated. In this instance, replace the chain.
Utilize the gage to verify the dress in elongation of your chain.
Common terms for sprockets
Nominal quantity of sprockets
The nominal variety of a sprocket would be the similar as the nominal quantity of the corresponding 
chain. By way of example, Chains this kind of as 50, 50HK, and 50LD might be engaged having a sprocket 50. It really is followed by symbols and characters indicating the quantity of chain strands, the number of sprocket teeth, hub variety, tooth head hardening, and so on.
Diameter of prepared hole and shaft hole finishing
A conventional sprocket for a single strand or double strand chain has a shaft hole prepared at a diameter stated in the table of dimensions. After you finish the shaft hole, machine it in reference on the outer diameter or root diameter.
Hardening of tooth heads
The teeth of the sprocket has to be hard and dress in resistant because they are impacted when engaged with the rollers of the chain and worn by sliding together with the rollers. When serious dress in and massive shocks are anticipated, sprocket.
Kinds, development and products
made from carbon steel or cast steel should really be made use of and high-frequency hardening ought to be performed.
The conventional sprockets 40 to 120 which has a hub on just one side for single and double strand chains are induction-hardened even if the amount of teeth is modest. Whether the product or service is induction hardened or not is shown from the tables of dimensions of respective sprockets to your reference. Moreover, during the following cases, induction-harden the teeth of your sprocket.?The little sprocket has 20 or significantly less teeth and is utilised at 1/6 or a lot more in the highest velocity stated within the table of highest kilowatt ratings.
The tiny sprocket is utilised at a change gear ratio of four:1 or far more.
The small sprocket is utilised to get a lower pace big load transmission as in instances of choice depending on the “Low-speed selection”.
Sprockets are used in conditions where the teeth are heavily worn.
Sprockets are utilized underneath conditions wherever you will find frequent begins and stops or sudden normal or reverse rotations.
Basic cautions
For selecting the quantity of teeth and pace ration from the sprocket, see “How to select right chain” . For cautions for installing a sprocket on a shaft and substitute timing, see “Installation adjustment maintenance” .
