This gage checks the wear-elongation of chains.
Test the chain elongation at a portion and that is most
commonly engaged with all the sprockets (portion almost certainly for being worn).
When the center on the pin on the chain to get measured
This gage checks the wear-elongation of chains.
Test the chain elongation at a portion and that is most
usually engaged using the sprockets (portion almost certainly to become worn).
When the center with the pin with the chain to be measured reaches the arrow level, it signifies that the chain has been critically elongated. In this case, substitute the chain.
Utilize the gage to check out the put on elongation of the chain.
Common terms for sprockets
Nominal quantity of sprockets
The nominal amount of a sprocket would be the similar because the nominal variety of the corresponding chain. For instance, Chains this kind of as 50, 50HK, and 50LD is usually engaged that has a sprocket 50. It is followed by symbols and characters indicating the number of chain strands, the amount of sprocket teeth, hub style, tooth head hardening, and so on.
Diameter of prepared hole and shaft hole finishing
A regular sprocket to get a single strand or double strand chain includes a shaft hole prepared at a diameter stated inside the table of dimensions. Whenever 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 need to be difficult and put on resistant because they are 
impacted when engaged using the rollers in the chain and worn by sliding with all the rollers. When serious wear and big shocks are anticipated, sprocket.
Kinds, construction and supplies
manufactured from carbon steel or cast steel should really be used and high-frequency hardening need to be carried out.
The typical sprockets 40 to 120 having a hub on only one side for single and double strand chains are induction-hardened even if the amount of teeth is compact. No matter if the solution is induction hardened or not is shown in the tables of dimensions of respective sprockets for the reference. Furthermore, in the following circumstances, induction-harden the teeth in the sprocket.?The small sprocket has 20 or significantly less teeth and it is utilized at 1/6 or a lot more with the maximum pace stated within the table of highest kilowatt ratings.
The small sprocket is utilised at a change gear ratio of 4:1 or a lot more.
The small sprocket is utilised for a minimal pace massive load transmission as in situations of selection depending on the “Low-speed selection”.
Sprockets are utilized in situations the place the teeth are heavily worn.
Sprockets are utilized under problems the place you will find frequent commences and stops or sudden frequent or reverse rotations.
Basic cautions
For choosing the number of teeth and speed 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” .
