FIELD: working inner surfaces of cylindrical parts. SUBSTANCE: tool includes mandrel 1 with stem 2 in the form of Morse cone, axle 4 to which scraping blade 5 is secured. Said scraping blade has dent 6 for engaging with stopper 7. Mandrel 1 has groove 8 in which coiled spring 9 is arranged. Second end of said spring is mounted in opening 10 of blade 5. EFFECT: improved design. 4 dwg
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