CHUCK FOR SECURING TOOL Russian patent published in 1994 - IPC

FIELD: machine-tool industry. SUBSTANCE: chuck has case 1 with inclined openings 2 wherein cams 3 are received. A drive for moving the cams is made of insert 4 coupled with case 1 of bearing 5. Screw 8, whose conical head 9 has undercutting 10 and radial grooves 11 for positioning crosspiece of cams 3, is inserted within opening 6. Head 9 has segment-like polished grooves positioned in groove 11 region. Bearing 5 is fixed by face ring 16 arranged in a ring step whose edge is rolled to the cone of ring 16. EFFECT: enhanced reliability. 5 dwg