4B124SK Sheave four-groove 12.75" OD #120 A-Plate Sprockets and precision sprocket with 16

and precision sprocket with 16 hardened teeth that is manufactured to accept a R1 bushing

This 3C85E Sheave uses a E QD bushing

This 35BS12 sprocket features a 3/4" finished bore including a key-way and two setscrews

our UCFB205-15 bearing has added features that improve the overall life and performance of the unit

4B124SK Sheave four-groove 12.75" OD #120 A-Plate Sprockets and precision sprocket with 16This 4B124SK sheave features four grooves, is 12. 75" in diameter, and is designed to use a SK bushing. QD (quick detachable) style sheaves offer a wider selection of bore sizes versus a standard "fixed" bore style sheave. Also because they are a two component part if one component fails the entire part doesn't need to be replaced. All of our sheaves are manufactured out of an extremely durable cast iron, are dynamically balanced at the factory, and