This gage checks the 
wear-elongation of chains.
Check the chain elongation at a portion which can be most
commonly engaged using the sprockets (portion almost certainly for being worn).
Once the center on the pin of the chain for being measured
This gage checks the wear-elongation of chains.
Test the chain elongation at a portion which is most
commonly engaged with the sprockets (portion almost certainly to get worn).
Once the center of your pin of the chain for being measured reaches the arrow stage, it means that the chain has been critically elongated. In this instance, exchange the chain.
Use the gage to verify the wear elongation of the chain.
Basic terms for sprockets
Nominal variety of sprockets
The nominal variety of a sprocket could be the identical because the nominal variety of the corresponding chain. For example, Chains this kind of as 50, 50HK, and 50LD might be engaged which has a sprocket 50. It can be followed by symbols and characters indicating the quantity of chain strands, the amount of sprocket teeth, hub type, tooth head hardening, and so on.
Diameter of prepared hole and shaft hole finishing
A standard sprocket for any 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 your outer diameter or root diameter.
Hardening of tooth heads
The teeth of a sprocket need to be challenging and put on resistant because they are impacted when engaged with the rollers from the chain and worn by sliding using the rollers. When significant put on and significant shocks are anticipated, sprocket.
Varieties, development and products
manufactured from carbon steel or cast steel really should be utilised and high-frequency hardening should really be carried out.
The normal sprockets 40 to 120 having a hub on only one side for single and double strand chains are induction-hardened even when the amount of teeth is smaller. Irrespective of whether the item is induction hardened or not is shown inside the tables of dimensions of respective sprockets to your reference. In addition, in the following circumstances, induction-harden the teeth of the sprocket.?The small sprocket has twenty or significantly less teeth and is used at 1/6 or more of the greatest speed stated from the table of highest kilowatt ratings.
The smaller sprocket is employed at a transform gear ratio of four:one or extra.
The small sprocket is made use of to get a very low pace big load transmission as in cases of assortment according to the “Low-speed selection”.
Sprockets are used in conditions exactly where the teeth are heavily worn.
Sprockets are employed under conditions wherever you can find frequent begins and stops or sudden common or reverse rotations.
General cautions
For deciding on the number of teeth and velocity ration with the sprocket, see “How to select proper chain” . For cautions for installing a sprocket on the shaft and replacement timing, see “Installation adjustment maintenance” .
