Abstract: The frictional type connector 10 includes an inner ring 20, an outer ring 30, and bolts 40. The outer surface of the inner ring 20 is formed into a tapered surface 23 which decreases the diameter from a flange portion 21 toward the other end of the inner ring. The outer ring 30 has an inner tapered surface 31, so that the tapered surface can face the outer tapered surface 23 of the inner ring 20. The taper angle .theta.i of the tapered surface of the inner ring 20 is larger than the taper angle .theta.o of the tapered surface of the outer ring 30.

Abstract: An apparatus for fastening a wheel, having a boss hole therein, to a shaft. The fastening apparatus includes an axially slit outer ring having a cylindrical outer peripheral surface fitted into the boss hole, a tapered inner peripheral surface, a support flange formed at one end of the ring adjacent the small diameter end of the tapered surface for direct engagement with the shaft, a cylindrical inner peripheral surface formed at the large diameter end of the tapered surface, and an enlarged annular end flange formed at the other end of the ring.