The smallest chain complying to ANSI is 25 of six.35 mm pitch. Even so, in response on the demands for smaller sized chains lately for higher engineering machinery such as office products, health-related machines and industrial robots, we supply 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 manufactured 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 from the table below.
Connecting hyperlinks and offset links
R connecting back links are employed for smaller pitch chains. On the other hand, because their power is reduce than that of the base chain, and since the clip is prone to come off in high speed operation, the use of connecting backlinks just isn’t proposed. Use a loop chain without having attaching connecting back links.
Offset backlinks can be found for chains besides 15 and 15H1, but their use is not advised for that identical explanation as stated for the 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 common chains employing curl bushings.
35: A ANSI common bushing chain appropriate for small precision machines that require higher power.
