ROTARY TOOL

Abstract: the spindle has a lower end portion configured as an externally threaded portion and a flange portion protruding radially outward from the spindle above the externally threaded portion. the anti-loosening member is fitted around the spindle above the externally threaded portion. the flange portion has a lower surface having a first inclined surface that extends in the circumferential direction around the drive axis and is inclined downward toward the first direction. the anti-loosening member includes an annular base portion having a second inclined surface that slidably contacts the first inclined surface, and a peripheral wall portion that protrudes upward along the outer edge portion of the base portion, and abuts the side surface of the flange portion during the rotation of the spindle to receive the rotational driving force. the peripheral wall portion is provided only in a part of the outer edge portion of the base portion.

Inventor(s): Ken GOTO

CPC Classification: B24B23/028 (MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth , of screw-threads ; by electro-erosion ; abrasive or related blasting ; tools for grinding, buffing or sharpening ; polishing compositions ; abrasives ; electrolytic etching or polishing ; grinding arrangements for use on assembled railway tracks ); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS)

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