CUTTER AND BLADE FOR IT Russian patent published in 2009 - IPC B23C5/20 

FIELD: instrument making.

SUBSTANCE: proposed cutter has a body with at least one working part with a removable cutting blade with a wavelike cutting edge, fitted on it. The working part has a wavelike outer surface, centred and matched with the wavelike peripheral surface of the cutting blade such that, projections of the blade are centred with the projections of the body, and depressions on the cutting blade are centred with depressions on the body. The working part has a socket under the blade, mainly bounded by a circular bearing surface with a recess, passing down from it to the base surface, and a peripheral wall located between them, with four side surfaces, joined at the corners. The cutting blade has an upper front surface, an intermediate bearing surface, a wavelike peripheral surface, located between them, and a projection which passes down from the intermediate bearing surface. The projection has an outer surface with four flat side surfaces, joined at the corners, passing between the intermediate bearing surface and the lower surface. Two adjacent side surfaces of the projection are in contact with two adjacent side surfaces of the recess, and the other two adjacent surfaces of the projection are in contact with the other two adjacent side surfaces of the recess.

EFFECT: more reliable fastening of the cutting blade.

6 cl, 9 dwg