ROTARY TOOLS Russian patent published in 2015 - IPC B24B23/02 B24B47/12 

FIELD: process engineering.

SUBSTANCE: invention relates to hand-hand tools. Claimed tool comprises the components that follow. The drive is meant for revolving the driven element. Spinning spindle is retained inside the casing. Impact damper is arranged between said driven element to transmit revolution of driven element to said spindle and to deliver the impact to said driven element. Driven element thrust bearing spins to support the driven element. Note here that said driven element can run about said spindle. Note here that said driven element thrust bearing is arranged between the casing and driven element and supported thereby at spinning.

EFFECT: reduced wear of driven element and spindle.

11 cl, 3 dwg