BS standard (European standard) roller chains require particular BS sprockets (RS sprockets/JIS standards cannot be used because of a 
different tooth width and external diameter).
Sizes, hardened teeth specifications, and bore finishings not shown in the dimensional chart are also on an MTO basis. Contact a Tsubaki representative for more information.
Fit Bore Series can be available with finished bores.
Sizes not proven in the dimensional chart are also available on an MTO basis (For example: 20B, 56B). Contact a Tsubaki representative to learn more