DRILLING BIT FEED LIMITER Russian patent published in 2011 - IPC B23B47/34 

FIELD: process engineering.

SUBSTANCE: proposed device comprises case with thrust grated frame, shaft arranged in said case to revolve and axially translate therein, and axially-adjusted retainer to limit drilling bit feed. Said thrust grated frame comprises plastic pin attached to the case to crush chips that gas end on the case side and free end, and arranged, in fact, parallel with and nearby workpiece surface and, in fact, radially outward in direction to stepped drilling bit to allow detaching said free end by end reamer in tool feed. Proposed limiter may be provided with cone fitted and secured on stepped drilling bit.

EFFECT: ruling out damaging of drilled part by chip tangle.

2 cl, 5 dwg