ROTARY CUTTING TOOL

摘要

ROTARY CUTTING-TOOL The disclosed cutting-tool comprises a stepped-diameter arbor with bearings supporting rotatably thereon a holder carrying the cup-shaped cutting bit. In accordance with the invention, the holder is made up of a hollow shaft and a sleeve encompassing this shaft. The sleeve is journalled adjacent to the cutting bit in one of the bearings located about the stepped-diameter arbor, said arbor having a central bore. The other bearing is accommodated within the central bore and supports the hollow shaft likewise accommodated in the central bore of the arbor. Owing to the disclosed structure of the holder and its interconnection with the stepped-diameter arbor, sufficient rigidity of the cuttingtool, matched by its compact size is ensured.