Radially adjustable rotary cutting tool
AssigneeAcme-Cleveland Corporation
InventorThomas Jerome Skingle
Life of this patent
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Abstract
A radially adjustable rotary cutting tool such as a rotary reamer or the like. The tool head has a generally cylindrical body with a shank at one end and a radially slotted cutting head at the other end. The cutting head has a central axially extending threaded bore adapted to receive a threaded expansion element that may be used to radially expand or enlarge the cutting head when turned into the bore. The cutting head has an inner core portion formed of a low to medium alloy carbon steel and an annular outer portion formed of a tool steel metallurgically bonded to the core portion to provide a unitary composite structure. The annular outer portion has a plurality of circumferentially spaced longitudinal flutes formed therein to define integral longitudinally extending radially adjustable cutting surfaces.
Claims4
In a rotary cutting tool with a cutting head having a generally cylindrical body with a threaded axial bore and a plurality of longitudinally extending radial slots extending through to the bore to accommodate radial expansion of the cutting head, and an expansion element threaded into said bore and adapted when turned into said bore to radially expand the cutting head, the improvement wherein said cutting head comprises an inner core portion consisting of low to medium alloy carbon steel and an annular outer portion consisting of a tool steel and metallurgically bonded to said core portion at an annular interface region, said annular outer portion being shaped to define a plurality of integral, circumferentially shaped longitudinally extending cutting surfaces.
Dependencies are inferred from the claim text.