Arm roller supporting device for a spinning reel

A supporting device which supports an arm roller to an arm cam at a spinning reel comprising:

• a support means at said arm cam of said reel for rotatably supporting said arm roller, said support means having an inverted U-like-shape and at one of two opposing walls a fitting groove and at the other of said opposing walls a threaded bore;
• a center pin mechanism having one end fitted nonrotatably into said fitting groove and another end fitted to a screw member screwed with said threaded bore, said center pin mechanism having spaced apart outer conical shaped supporting faces slanted with respect to the axis of said center pin mechanism, said arm roller having at opposite axial ends recesses containing conical inner surfaces respectively engaging with the conical shaped supporting faces of said center pin mechanism to transmit to said support means a load acting on said arm roller, so that said arm roller contacts with said support means at a contact portion where the contacting direction is slantwise with respect to the axis of rotation of said arm roller.