SYSTEM FOR ATTACHING ACCESSORIES TO A ROTARY HAND TOOL

摘要

A system for attaching an accessory attachment to a rotary hand tool of the type having a body with a generally cylindrical nose end portion (16) through which an output shaft (15) passes. The preferred embodiment of the system has an attachment that has an attaching end which matingly engages the nose end portion (16) of the hand tool, and includes a rotatable coupling with inner threads that engage outer threads on the nose portion. The nose portion of the hand tool also has at least one recess (72') which is configured to receive at least one projection on the attachment which accurately angularly positions the attachment on the hand tool. The preferred embodiment has at least one complementary tapered recess and projection combination which facilitates easy insertion of the projection into the recess during attaching.