TOOL FOR WORKING DEEP HOLES Russian patent published in 1996 - IPC

FIELD: mechanical engineering. SUBSTANCE: tool has cutting unit 2 mounted on housing 1 and bearing members 3 and 4 with ways 5 and 6 for setting radially movable rolling bodies 7. The bodies are enclosed with separators 8 and 9 being in two sets over the housing length 1. Additional sets of rolling bodies 10 and 11 are used for interaction with housing 1. Pressing unit is made up as bushing 13 and spring 25 positioned from the side of bearing member 4. Bearing members 3 and 4 are rigidly secured to housing 1. Rolling bodies 7 move in the axial direction with respect to these members. Separators 8 and 9 in each set are conjugated with end face of bushing 13 through bearing bushings 27 and 28 and additional set of rolling bodies 10 and 11. Antifriction bushings 30 and 31 with collars are coaxially interposed between the other end faces of separators 8 and 9. Springs 32 and adjusting nut 33 are interposed between the collars. The nut is mounted on one of bushings 31. Additional sets of rolling bodies 10 and 11 are positioned at the conjugation of end faces of bushing 13 and threaded pins 20 with bearing bushings 27 and 28 on housing 1. The rolling bodies interact with the surface of ring 12 and bushing 13. EFFECT: improved design. 4 dwg