HAND-HELD ROTARY MACHINE OPERATED IN FIRST AND SECOND GEAR Russian patent published in 2012 - IPC B25B21/00 

FIELD: process engineering.

SUBSTANCE: invention relates to hand-held rotary machine, particularly, to machine output shaft rpm control device. Proposed device comprises motor shaft, drive shaft, gear making a part of transfer mechanism to transmit torque from motor shaft to drive shaft, thrust element and, at least, one bearing element in contact with said gear. Gear wheel, thrust element and, at least, one bearing element make assembly staying in first position along rotational axis when machine in is first gear and in second position along rotational axis when machine is second gear. At least, one bearing element extends from thrust element toward gear to revolve in sync with the halter.

EFFECT: lower costs and wear.

14 cl, 10 dwg