This gage checks the wear-elongation of chains.
Test the chain elongation 
at a portion which can be most
usually engaged with the sprockets (portion most likely for being worn).
Once the center in the pin with the chain to get measured
This gage checks the wear-elongation of chains.
Check the chain elongation at a portion that’s most
regularly engaged with all the sprockets (portion almost certainly for being worn).
Once the center of 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 may be the similar because the nominal variety of the corresponding chain. One example is, Chains this kind of as 50, 50HK, and 50LD could be engaged by using a sprocket 50. It is followed by symbols and characters indicating the number of chain strands, the amount of sprocket teeth, hub form, tooth head hardening, etc.
Diameter of ready hole and shaft hole finishing
A conventional sprocket to get a single strand or double strand chain has 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 a sprocket needs to be hard and dress in resistant because they are impacted when engaged together with the rollers of your chain and worn by sliding together with the rollers. When severe put on and substantial shocks are anticipated, sprocket.
Styles, development and materials
made from carbon steel or cast steel must be used and high-frequency hardening should be carried out.
The typical sprockets 40 to 120 having a hub on only one side for single and double strand chains are induction-hardened even though the amount of teeth is modest. No matter whether the product or service is induction hardened or not is shown while in the tables of dimensions of respective sprockets to your reference. Furthermore, while in the following circumstances, induction-harden the teeth with the sprocket.?The modest sprocket has twenty or much less teeth and it is utilised at 1/6 or more of the greatest pace stated during the table of highest kilowatt ratings.
The modest sprocket is made use of at a change gear ratio of four:one or a lot more.
The tiny sprocket is made use of for a reduced velocity big load transmission as in scenarios of choice based upon the “Low-speed selection”.
Sprockets are utilized in conditions the place the teeth are heavily worn.
Sprockets are utilised underneath disorders exactly where there are actually frequent starts and stops or sudden normal or reverse rotations.
Common cautions
For deciding on the quantity of teeth and speed ration from the sprocket, see “How to select good chain” . For cautions for installing a sprocket on a shaft and replacement timing, see “Installation adjustment maintenance” .
