| 摘要 |
A particularly better rotary cutter for a road planing machine and the like has special holders provided with multi-sided tapered sockets extending generally tangential to the drum surface. A multiple tip cutting bit suitable for use with the aforementioned cutter has two or more tips symmetrically and equidistantly spaced about the projected centerline of an integral tapered shank. The shank has a multi-sided cross-sectional shape corresponding in arrangement to the pattern of the cutting tips, such that the bit can be indexed in its holder to place any selected one of the cutting tips in the operative position. |
