This gage checks the wear-elongation of chains.
Check out the chain elongation at a portion that is most
regularly engaged using the sprockets (portion most likely to get worn).
Once the center from the pin with the chain to get measured
This gage checks the wear-elongation of chains.
Check the chain elongation at a portion which is most
usually engaged together with the sprockets (portion probably to become worn).
Once the center of the pin in the chain to get measured reaches the arrow point, it signifies that the chain continues to be critically elongated. In this instance, replace the chain.
Utilize the gage to test the dress in elongation of your chain.
Standard terms for sprockets
Nominal quantity of sprockets
The nominal amount of a sprocket will be the exact same as the nominal quantity of the corresponding chain. One example is, Chains such as 50, 50HK, and 50LD may be engaged having a sprocket 50. It really is followed by symbols and characters indicating the quantity of chain strands, the quantity of sprocket teeth, hub kind, tooth head hardening, and so on.
Diameter of ready hole and shaft hole finishing
A standard sprocket to get a single strand or double strand chain features a shaft hole prepared at a diameter stated in the table of dimensions. After 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 must be hard and dress in resistant as they are impacted when engaged using the rollers of your chain and worn by sliding together with the rollers. When severe dress in and significant shocks are anticipated, sprocket.
Forms, construction and products
made from carbon steel or cast steel must be used and high-frequency hardening should really be conducted.
The standard sprockets forty to 120 with a hub on only one side for single and double strand chains are induction-hardened even if the number of teeth is smaller. No matter if the item is induction hardened or not is shown from the tables of dimensions of respective sprockets for your reference. Additionally, within the following situations, induction-harden the teeth of the sprocket.?The little sprocket has 20 or significantly less teeth and it is 
utilized at 1/6 or more on the optimum pace stated while in the table of highest kilowatt ratings.
The smaller sprocket is used at a change gear ratio of four:one or additional.
The little sprocket is applied to get a lower speed huge load transmission as in situations of assortment based upon the “Low-speed selection”.
Sprockets are used in circumstances exactly where the teeth are heavily worn.
Sprockets are utilized below conditions wherever there are regular starts and stops or sudden frequent or reverse rotations.
General cautions
For choosing the number of teeth and speed ration on the sprocket, see “How to select right chain” . For cautions for installing a sprocket on a shaft and replacement timing, see “Installation adjustment maintenance” .