GUIDING SLEEVE Russian patent published in 1997 - IPC

FIELD: machine tool manufacture, namely, fitting for precisely guiding cutting tools such as drills, reamers and so on at working deep holes. SUBSTANCE: guiding sleeve has body made of two parts: captive nut 1 and union 3 mutually joined by left-hand thread joint. Changeable insert 2 rests upon inner surface of union 3. Sealing member 7 is placed on free portion of inner surface of union. Member engages with inner end surface of captive nut 1. Length of changeable annular insert 2 is more or less than depth of seat for it in captive nut 1. Annular turning 8 or annular protrusion 9 is made respectively on inner portion of end surface of union 3. EFFECT: improved design. 3 cl, 3 dwg