Tightly controlled face to bore perpendicularity is maintained (TIR of It has about 25% more holding power than standard round bore collars of equivalent bore size and can be used as a short rigid coupling in applications where standard length rigid couplings will not fit.Keyed Shaft Collar, 2pc Double Wide, Bore 12mm, Steel, OD 28mm The addition of a keyway allows for use in positive drive applications as a shaft collar or for extra torque capacity when used as a rigid coupling.
. Ruland clamp style shaft collars do not mar the shaft, are infinitely adjustable, and have superior holding power when compared to set screw collars.Keyed Shaft Collar, 1pc Double Wide, Bore 8mm, Steel, OD 18mm The addition of a keyway allows for use in positive drive applications as a shaft collar or for extra torque capacity when used as a rigid coupling.