Balanced Shaft Collar, 2pc, Bore 1.5625, Stainless, OD 2 3/8
. Tightly controlled face to bore perpendicularity is maintained (TIR of It has a balanced design for better performance in high RPM applications. Ruland clamp style shaft collars do not mar the shaft, are infinitely adjustable, and have superior holding power when compared to set screw collars.