The smallest chain complying to ANSI is 25 of 6.35 mm pitch. Even so, in response towards the demands for smaller chains in recent times for large technologies machinery such as office equipment, health-related machines and industrial robots, we present 15 of four.7625 mm (3/16 inch) pitch as well as 15H1 being a high-power edition of 15. These substantial precision chains are manufactured beneath serious high quality control specifically necessary for compact sizes, taking put on resistance also under consideration.
Variety of chain
Refer on the “Low-speed selection”. However, the chain operation pace could be set substantially substantial based upon the kind of lubrication as shown while in the table under.
Connecting backlinks and offset backlinks
R connecting links are utilized for small pitch chains. Even so, considering that their power is reduced than that on the base chain, and since the clip is likely to come off in higher velocity operation, the usage of connecting links just isn’t 
advisable. Use a loop chain with no attaching connecting hyperlinks.
Offset back links are available for chains other than 15 and 15H1, but their use will not be advisable for your similar explanation as stated for your R Connecting backlinks.
Working pace and form of lubrication
15: A higher precision mini-pitch bushing chain that is smaller sized than a compact drive chain for general applications, 25
25: Smallest bushing chain amongst ANSI common chains utilizing curl bushings.
35: A ANSI common bushing chain suitable for tiny precision machines that call for large power.