This gage checks the wear-elongation of chains.
Verify the chain elongation at a portion that’s most
usually engaged together with the sprockets (portion most likely to get worn).
When the center with the pin of the chain for being measured
This gage checks the wear-elongation of chains.
Test the chain elongation at a portion that’s most
regularly engaged with the sprockets (portion probably to become worn).
When the center in the pin of the chain to be measured reaches the arrow point, it signifies that the chain has become critically elongated. In this instance, change the chain.
Make use of the gage to examine the wear elongation of the chain.
General terms for sprockets
Nominal amount of sprockets
The nominal variety of a sprocket will be the exact same since the nominal number of the corresponding chain. For instance, Chains this kind of as 50, 50HK, and 50LD is often engaged having a sprocket 50. It really is followed by symbols and characters indicating the number of chain strands, the quantity of sprocket teeth, hub sort, tooth head hardening, and so forth.
Diameter of ready hole and shaft hole finishing
A normal sprocket for a single strand or double strand chain features a shaft hole prepared at a diameter stated within the table of dimensions. Any time you finish the shaft hole, machine it in reference to the outer diameter or root diameter.
Hardening of tooth heads
The teeth of a sprocket should be hard and put on resistant as they are impacted when engaged using the rollers of your chain and worn by sliding together with the rollers. When extreme dress in and big shocks are anticipated, sprocket.
Sorts, development and elements
manufactured from carbon steel or cast steel must be utilized and high-frequency hardening really should be carried out.
The normal sprockets forty to 120 which has a hub on only one side for single and double strand chains are induction-hardened 
whether or not the amount of teeth is smaller. No matter if the product or service is induction hardened or not is proven within the tables of dimensions of respective sprockets for the reference. In addition, in the following instances, induction-harden the teeth from the sprocket.?The modest sprocket has twenty or significantly less teeth and it is used at 1/6 or a lot more from the greatest pace stated while in the table of greatest kilowatt ratings.
The modest sprocket is utilised at a transform gear ratio of four:1 or additional.
The little sprocket is utilized for any very low speed substantial load transmission as in cases of variety based on the “Low-speed selection”.
Sprockets are utilized in conditions in which the teeth are heavily worn.
Sprockets are applied beneath disorders the place there are regular commences and stops or sudden regular or reverse rotations.
General cautions
For choosing the amount of teeth and velocity ration of your sprocket, see “How to select correct chain” . For cautions for putting in a sprocket on the shaft and replacement timing, see “Installation adjustment maintenance” .
