| 摘要 |
PROBLEM TO BE SOLVED: To adopt a pin having a corrosion resistant film as a hollow pin used generally for connecting pins or connecting a floating disc to a hub, and prevent breakage of the corrosion resistant film when the pin is caulked. SOLUTION: Arcuate chamfered portions each having a projected section are formed on corners of a center hole 8b and an end face 8c of a hollow pin 8 at its caulking end. The hollow pin 8 is inserted into connecting recessions 5, 6 of a hub 2 and a disc part 3. A belleville spring and a fixation washer 11 are fitted. An extended part 8e is formed on the end face 8c by rolling a caulking roller, and the fixation washer 11 is caulked. A pin, being taperedly chamfered or not chamfered, causes breakage of corrosion resistance film. The pin 8, being arcuately chambered, causes no breakage.
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