| 摘要 |
<p>The area of a closely contacting surface of a shell type milling cutter (1) with respect to a milling arbor (3) is increased to heighten the rigidity and mounting strength of the milling cutter and thereby enable a high-speed cutting operation and a very simple replacement of the milling cutter. A tapering bore is formed in the shell type milling cutter (1), and a bush (2) is inserted in a clearance between the tapering bore and a mounting shaft of the milling arbor (3). A cotter (4) is inserted into cotter bores (1c), (2c), (3b) formed in the milling cutter (1), bush (2) and milling arbor (3), to fit the bush (2) under pressure and thereby fix the milling arbor (3) and milling cutter (1).</p> |
