L110B Insert | L110B Coupling Insert - L110B Spider (Bronze) 10B-4 Metric Roller Chain This 80BS17 sprocket features a

This 80BS17 sprocket features a 1-1/2" finished bore with a key-way and two set screws

Dimension (D): 68mm

80A27 sprockets with a stock bore comes with a 1-3/16" inside diameter plain hole and can be easily machine bored to custom sizes

and precision double sprocket with 15 hardened teeth that is manufactured to accept a 2012 bushing

We havre bushed type double-single sprockets on the shelf and the capabilities to re-bore/ machine these sprockets out ranging from 1-1/4" bore out to 2-3/4" bore

L110B Insert | L110B Coupling Insert - L110B Spider (Bronze) 10B-4 Metric Roller Chain This 80BS17 sprocket features aL110B insert is a precision coupling insert precision machined from high quality bronze. L110B inserts are also commonly referred to as L110B spiders. Bronze jaw coupling inserts go between two L110 hubs, prevent a steel on steel contact, and allow for a slight misalignment between two shafts. When replacing a coupling assembly, it is essential to note that the oil impregnated L110B bronze inserts are ideal for high torque but low speed applications.