| 摘要 |
PCT No. PCT/SE97/02147 Sec. 371 Date Aug. 25, 1999 Sec. 102(e) Date Aug. 25, 1999 PCT Filed Dec. 17, 1997 PCT Pub. No. WO98/26890 PCT Pub. Date Jun. 25, 1998A holesaw includes an arbor for supporting a pilot drill and a bell-shaped sawblade. The sawblade is attached to a lower threaded portion of the arbor. A pin support with at least one pin engages the top of the holesaw blade and is axially movable but not rotationally movable relative to the arbor. A clamping sleeve is threaded onto an upper threaded portion of the arbor. The clamping sleeve can be screwed down to press against the bell top of the sawblade. A spring may be disposed between the clamping sleeve and the pin support. |
