Adapter Sleeves is used for fixing conical self-aligning bearing (self-aligning ball bearing, self-aligning roller bearing) on the shaft without shoulder with simple structure, reliable operation and convenient change. It is widely in the belt conveying equipment in the fields of textile, light industry, paper-making industry, metallurgical industry. The Adapter Sleeves is composed of tapered adepter bush, locknut, lock washer (or retainer). The Adapter Sleeves with locknut and lock washer is only replaced with whole set. The parts not from same resource are not changeable (equal to ISO113/1-1979)