APPARATUS FOR DRIFTING DEEP HOLES Russian patent published in 1999 - IPC

FIELD: different branches of machine engineering and instrument making, namely deep hole working. SUBSTANCE: apparatus includes housing with opening for drift and for pusher of drift drive and guiding unit for pusher secured to housing. Guiding unit is in the form of several plates with central opening for pusher and with bosses on edges for engaging with columns. Columns for different plates are arranged in different planes passing through axis of pusher. EFFECT: improved design due to lowered length of pusher, enhanced operational reliability, reduced size of apparatus. 2 dwg