To provide a broach not required to clamp a cutting material by a special clamping device and not to intermittently carry out cutting.
The helical broach 10 used to work an inner helical gear or a spline has a slender main body 1, a plural number of cutting blades provided on the slender main body 1, interfaced in the axial direction and arranged with intervals between them, a blade trace 4 of the cutting blade 2 extending with the same helix angle 3 as a tooth trace of the inner helical gear to be worked in the longitudinal direction around an axis 5 of the slender main body 1 and extending with the helix angle and a blade groove 3 of the cutting blade 2 extending with a helix angle a against a flat surface vertical with the axis 5 in the peripheral direction adjacent to it. The helical direction of the cutting groove 3 is made in the same direction as the helical direction of the helical groove hole.
| JP2007050470 | HIGH PRECISION HELICAL BROACH |
| JPS5915772 | [Title of the Invention] Helical brooch |
| JP6036454 | Spline brooch |
NOGAWA YASUSHI
NAKANAGA HIDETAKA
NISHIMURA KATSUHIKO
AISIN AW CO
| JPH0215915A | 1990-01-19 | |||
| JPH0818181B2 | 1996-02-28 | |||
| JPH09234627A | 1997-09-09 | |||
| JPH02145922U | 1990-12-11 | |||
| JP2000094215A | 2000-04-04 |