SPINDLE HEAD OF CRYSTAL CUTTING TOOL (VERSIONS) Russian patent published in 2011 - IPC B28D5/00 

FIELD: process engineering.

SUBSTANCE: invention relates to finishing of noble stones, diamonds, particularly, to diamond cutting machine tools. Proposed spindle head comprises bed with tail spindles, flat-belt drive, and screwed spindle with sawing disk. Note here that spindle ends are provided with tapered journals to interact with plain bearings fitted on tapered surfaces of top and bottom inserts mounted in spindle head tail spindles. Said inserts represent roller supports, each comprising roller case and support with ledge. Note also that roller case face, facing spindle journal, accommodates taper roller bearing while opposite face has a groove accommodating radial-thrust antifriction bearing fitted therein. Support with ledge is mounted in aforesaid tail spindles to support roller case secured along ID of radial-thrust antifriction bearing race. In compliance with another version, inserts represent combined plain and antifriction roller bearings. Note here that there is spherical circular race made on radial cylindrical surface of groove to make bearing surface, while support ledge outer surface is furnished with spherical circular race of reverse bearing made symmetrically in horizontal axial plane, where between separator with balls is arranged.

EFFECT: longer life, operation in dry and semidry friction.

4 cl, 2 dwg