This gage checks the wear-elongation of chains.
Test the chain elongation at a portion that’s most
frequently engaged with the sprockets (portion probably to be worn).
When the center in the pin in the chain for being 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 almost certainly to be worn).
Once the center from the pin on the chain to be measured reaches the arrow point, it signifies that the chain has become critically elongated. In this instance, replace the chain.
Use the gage to check the wear elongation of your chain.
Standard terms for sprockets
Nominal amount of sprockets
The nominal amount of a sprocket would be the same since the nominal number of the corresponding chain. For example, Chains such as 50, 50HK, and 50LD can be engaged by using a sprocket 50. It is followed by symbols and characters indicating the amount of chain strands, the amount of sprocket teeth, hub kind, tooth head hardening, etc.
Diameter of prepared hole and shaft hole finishing
A regular sprocket for a single strand or double strand chain features a shaft hole ready at a diameter stated within the table of dimensions. Whenever you finish the shaft hole, machine it in reference to your outer diameter or root diameter.
Hardening of tooth heads
The teeth of the sprocket should be hard and dress in resistant as they are impacted when engaged together with the rollers of the chain and worn by sliding together with the rollers. When significant put on and big shocks are anticipated, sprocket.
Kinds, construction and components
made from carbon steel or cast steel really should be utilized and high-frequency hardening really should be carried out.
The typical sprockets forty to 120 with a hub on only one side for single and double strand chains are induction-hardened even though the quantity of teeth is compact. Whether the product is induction hardened or not is proven during the tables of dimensions of respective sprockets for your reference. Additionally, during the following scenarios, induction-harden the teeth with the sprocket.?The little sprocket has 20 or much less teeth and is utilised at 1/6 or much more of the maximum velocity stated in the table of maximum kilowatt ratings.
The tiny sprocket is employed at a modify gear ratio of 4:one or more.
The compact sprocket is utilised for a reduced velocity big load transmission as in instances of variety dependant on the “Low-speed selection”.
Sprockets are used in situations exactly where the teeth are heavily worn.
Sprockets are used beneath disorders wherever you’ll find frequent begins and 
stops or sudden normal or reverse rotations.
Common cautions
For deciding on the number of teeth and pace ration in the sprocket, see “How to pick right chain” . For cautions for installing a sprocket on the shaft and substitute timing, see “Installation adjustment maintenance” .
