FIELD: metal processing. SUBSTANCE: apparatus has body, in apertures of which there are chuck jaws with slide blocks, contacting pipe inner surface and movable cones, fixed by spring washer on screw, that is engaged with threaded support and provided with square. Guide screw with flywheel are fixed on inner threading of body. Flywheel has groove, in which slider is placed. Faceplate with chisels, fixed by screws in gear grooves, is fixed on slider. The gear is engaged with another gear, mounted on support of cantilever, provided with loading ring and drive. EFFECT: apparatus to chafer pipes is used in pipes processing. 1 dwg
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