The smallest chain complying to ANSI is 25 of six.35 mm pitch. Nevertheless, in response for the demands for smaller sized chains lately for higher technologies machinery such as office tools, health-related machines and industrial robots, we give 15 of 4.7625 mm (3/16 inch) pitch and also 15H1 as being a high-power version of 15. These higher precision chains are produced underneath severe good quality management primarily needed for little sizes, taking wear resistance also into account.
Collection of chain
Refer to your “Low-speed selection”. On the other hand, the chain operation pace can be set considerably large depending on the type of lubrication as shown inside 
the table below.
Connecting hyperlinks and offset back links
R connecting back links are employed for modest pitch chains. On the other hand, because their power is reduce than that with the base chain, and since the clip is prone to come off in high speed operation, the use of connecting backlinks isn’t encouraged. Use a loop chain without having attaching connecting backlinks.
Offset backlinks can be found for chains besides 15 and 15H1, but their use is not advised to the very same explanation as stated for your R Connecting links.
Working velocity and sort of lubrication
15: A large precision mini-pitch bushing chain that may be smaller than a compact drive chain for standard applications, 25
25: Smallest bushing chain amongst ANSI normal chains making use of curl bushings.
35: A ANSI regular bushing chain appropriate for small precision machines that need higher power.
