| 摘要 |
A rotary cutter (1) comprises an elongate body portion (2) having at one end a shank (3) and at the other end a cutting head (4). At least one flute (5) is provided, of relatively short length, as is a radius (6) on the trailing end of the cutting portion of each flute (5). A first gash face (8) extends axially inwardly from a terminal end (9) of each flute (5) e.g. at 3 DEG , and each first gash face (8) is extended by a contiguous, secondary gash (10) on the rear face of each flute (5) e.g. at 45 DEG . |
