This gage checks the wear-elongation of chains.
Test the chain elongation at a portion and that is most
frequently engaged using the sprockets (portion most likely for being worn).
When the center in the pin with the chain to be measured
This gage checks the wear-elongation of chains.
Check the chain elongation at a portion and that is most
regularly engaged with all the sprockets (portion almost certainly for being worn).
Once the center in the pin from the chain to become measured reaches the arrow level, it means that the chain has been critically elongated. In this instance, substitute the chain.
Make use of the gage to examine the dress in elongation of your chain.
General terms for sprockets
Nominal amount of sprockets
The nominal quantity of a sprocket would be the similar because the nominal variety of the corresponding chain. One example is, Chains such as 50, 50HK, and 50LD could be engaged that has a sprocket 50. It really is followed by symbols and characters indicating the number of chain strands, the quantity of sprocket teeth, hub type, tooth head hardening, etc.
Diameter of ready hole and shaft hole finishing
A regular sprocket to get a single strand or double strand chain features a shaft hole prepared at a diameter stated during the table of dimensions. Once you finish the shaft hole, machine it in reference on the outer diameter or root diameter.
Hardening of tooth heads
The teeth of the sprocket needs to be challenging and wear resistant because they are impacted when engaged with the rollers of your chain and worn by sliding together with the rollers. When severe put on and substantial shocks are anticipated, sprocket.
Kinds, development and materials
made from carbon steel or cast steel must be used and high-frequency hardening should be carried out.
The standard sprockets 40 to 120 using a hub on only one side for single and double strand chains are induction-hardened whether or not the quantity of teeth is compact. Irrespective 
of whether the products is induction hardened or not is shown while in the tables of dimensions of respective sprockets to your reference. Moreover, while in the following circumstances, induction-harden the teeth of your sprocket.?The compact sprocket has twenty or significantly less teeth and is utilised at 1/6 or a lot more of the greatest velocity stated within the table of greatest kilowatt ratings.
The compact sprocket is used at a change gear ratio of four:one or a lot more.
The tiny sprocket is used for a minimal velocity big load transmission as in scenarios of choice based upon the “Low-speed selection”.
Sprockets are used in conditions wherever the teeth are heavily worn.
Sprockets are made use of under disorders exactly where there are actually frequent starts and stops or sudden normal or reverse rotations.
Common cautions
For deciding on the number of teeth and speed ration from the sprocket, see “How to select good chain” . For cautions for putting in a sprocket on a shaft and replacement timing, see “Installation adjustment maintenance” .
