BEARING UNIT FOR DRIVING WHEEL

摘要

PROBLEM TO BE SOLVED: To realize a structure reduced in size and weight, and having excellent durability and reliability. SOLUTION: An inner ring 50 is fixed to a hub 6a by caulking part 27. A spline hole 28 of the hub 6a and a spline shaft 30 of a driving shaft member 29 are engaged to each other. A snap ring 35 is straddled between an outside locking groove 13 formed in an inner peripheral surface of the spline hole 28 and an inside locking groove 14 formed in an outer peripheral surface of the spline shaft 30, thereby preventing disengaging of the sprine shaft 30.