L099U Insert | L099U Coupling Insert - L099U Spider (Urethane) D40B48 Sprockets This 40BS57 sprocket features a

This 40BS57 sprocket features a 1-7/16" finished bore including a key-way and two setscrews

35BS13 5/8" Finished Bore Sprocket Dimensions

120A10 sprockets with a stock bore comes with a 1-1/4" inside diameter plain hole and can be easily machine bored to custom sizes

and bushings

While the phosphate coated and then painted finish adds corrosion resistance to the 33V412SH sheave

L099U Insert | L099U Coupling Insert - L099U Spider (Urethane) D40B48 Sprockets This 40BS57 sprocket features aL099U insert is a Urethane jaw coupling insert with good flexibility and medium soft torsional stiffness. L099U inserts are also called L099U spiders and are used within L099 coupling hubs. The insert is the critical component allowing flexibility and is placed between the jaw hubs, preventing metal on metal contact. More specifically, the L099U coupling insert is made from high quality Urethane, which is a polyurethane material that is orange in