This gage checks the wear-elongation of chains.
Verify the chain elongation at a portion which is most
commonly engaged with the sprockets (portion almost certainly to get worn).
When the center of your pin from the chain for being measured
This gage checks the wear-elongation of chains.
Examine the chain elongation at a portion which is most
frequently engaged together with the sprockets (portion most likely to become worn).
When the center from the pin with the chain to get measured reaches the arrow level, it signifies that the chain has been critically elongated. In this instance, substitute the chain.
Utilize the gage to verify the put on elongation of one’s chain.
Standard terms for sprockets
Nominal amount of sprockets
The nominal number of a sprocket is definitely the exact same because the nominal variety of the corresponding chain. For instance, Chains this kind of as 50, 50HK, and 50LD is usually engaged having a sprocket 50. It is actually 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 common sprocket to get a single strand or double strand chain has a shaft hole prepared at a diameter stated inside the table of dimensions. When you finish the shaft hole, machine it in reference towards the outer diameter or root diameter.
Hardening of tooth heads
The teeth of the sprocket has to be challenging and wear resistant because they are impacted when engaged with the rollers of your chain and worn by sliding using the rollers. When significant put on and large shocks are anticipated, sprocket.
Kinds, building and supplies
made from carbon steel or cast steel should really be used and high-frequency hardening ought to be conducted.
The normal sprockets forty to 120 which has a hub on only one side for single and double strand chains are induction-hardened even when the number of teeth is little. No matter whether the product or service is induction hardened or not is proven in the tables of dimensions of respective sprockets for your reference. Furthermore, in the following cases, induction-harden the teeth with the sprocket.?The compact sprocket has 20 or much less teeth and it is made use of at 1/6 or much more of the maximum velocity stated inside the table of greatest kilowatt ratings.
The modest sprocket is utilised at a change gear 
ratio of four:1 or more.
The compact sprocket is utilized to get a low speed significant load transmission as in scenarios of choice determined by the “Low-speed selection”.
Sprockets are utilized in circumstances the place the teeth are heavily worn.
Sprockets are utilized underneath conditions exactly where there are frequent commences and stops or sudden normal or reverse rotations.
General cautions
For deciding on the amount of teeth and pace ration with the sprocket, see “How to pick good chain” . For cautions for installing a sprocket on a shaft and substitute timing, see “Installation adjustment maintenance” .
