The smallest chain complying to ANSI is 25 of 6.35 mm pitch. 
However, in response to the demands for smaller chains in recent times for high technology machinery such as office gear, medical machines and industrial robots, we give 15 of 4.7625 mm (3/16 inch) pitch and in addition 15H1 like a high-power edition of 15. These high precision chains are produced below severe top quality handle specifically necessary for small sizes, taking wear resistance also into consideration.
Variety of chain
Refer to the “Low-speed selection”. Even so, the chain operation velocity might be set considerably higher dependant upon the kind of lubrication as shown within the table beneath.
Connecting hyperlinks and offset back links
R connecting backlinks are applied for compact pitch chains. Having said that, since their strength is reduce than that of your base chain, and because the clip is likely to come off in large speed operation, using connecting links is just not encouraged. Use a loop chain without attaching connecting hyperlinks.
Offset links can be found for chains aside from 15 and 15H1, but their use is just not advisable to the exact same purpose as stated for your R Connecting back links.
Operating speed and form of lubrication
15: A large precision mini-pitch bushing chain that is certainly smaller than a compact drive chain for standard applications, 25
25: Smallest bushing chain amid ANSI standard chains working with curl bushings.
35: A ANSI typical bushing chain appropriate for compact precision machines that demand large power.
