WEDGE-TYPE CHUCK Russian patent published in 1995 - IPC

FIELD: metal working. SUBSTANCE: wedge-type chuck has the body 1, the cylindrical sleeve 2 and the cone sleeve 3, joined with the sleeve 2 by a thread joint. The sleeve 2, being centered on the body 1, is joined with that body through balls 4. The retainer 5, arranged in the sleeve 2, has clamping double-side wedges 6 with inclined surfaces 7, placed in inclined slots of the threaded sleeve 8. The wedges 6 engage with the cone sleeve 3. Rear portions of the clamping wedges 6 have cross section in the form of a square with chamfers along the whole length. The inclined slots of the threaded sleeve 8 have a cross section in the form of a circle or a square, whose diameter "d" and side "a₁" respectively are determined according to a given formula. EFFECT: prevention of jamming of double-side clamping wedges due to a guaranteed gap at all sides of their cross section. 1 cl, 4 dwg