| 摘要 |
530,604. Tool-holders. O. K. TOOL CO., Inc. June 28, 1939, No. 18847. Convention date, Nov. 23, 1938. [Class 83 (iii)] In a lathe &c. toolholder 10, a removable bit 12 is mounted in a recess at the forward end having inclined surfaces 14, 15, 19 and is forced against the first two surfaces by a wedge 17 attached to a shank 21 provided with a clamping nut 23. The forward end of the shank is bent at 21a so that the wedge will be raised to free it from the bit when the nut 23 is released and the recess 24 in the holder which accommodates this part of the shank is enlarged to allow transverse movement thereof to compensate for inequalities in the clamping surfaces. Longitudinal serrations on the lower face of the bit and the surface 14 of the holder enable the bit to be adjusted laterally and prevent it from tilting &c. The rear end of the shank 21 is a close fit in the bore 22 of the holder. Specification 515,438 is referred to. |
