The smallest chain complying to ANSI is 25 of 6.35 mm pitch. Nevertheless, in response to the demands for smaller chains lately for high technology machinery such as office gear, healthcare machines and industrial robots, we present 15 of 4.7625 mm (3/16 inch) pitch and in addition 15H1 like a high-power version of 15. These higher precision chains are produced below serious good quality management particularly necessary for little sizes, taking dress in resistance also into consideration.
Variety of chain
Refer to your 
“Low-speed selection”. Nonetheless, the chain operation speed could be set considerably high determined by the type of lubrication as shown within the table under.
Connecting backlinks and offset links
R connecting hyperlinks are made use of for smaller pitch chains. On the other hand, considering the fact that their strength is reduced than that of your base chain, and because the clip is more likely to come off in higher speed operation, using connecting back links is just not proposed. Use a loop chain without the need of attaching connecting links.
Offset back links can be found for chains aside from 15 and 15H1, but their use will not be encouraged for that exact same purpose as stated to the R Connecting links.
Operating pace and form of lubrication
15: A large precision mini-pitch bushing chain that is definitely smaller sized than a compact drive chain for general applications, 25
25: Smallest bushing chain amongst ANSI regular chains applying curl bushings.
35: A ANSI common bushing chain appropriate for small precision machines that demand large power.
