| 摘要 |
<p>The hole cutter consists of a sole plate (15) carrying a supporting frame for a column and drive unit (8) with a rotary cutting tool (11). The drive unit is mounted freely on a guide housing (7) and drives the cutting tool through a reduction gear (861-865) and a hollow shaft (83). The cutting tool is hollow and offset relative to the axis of an electric, pneumatic or hydraulic motor (81), and a rod (5) or cable passes through the drive shaft and engages with the core being cut from the masonry so that it does not fall once it has been cut through. In addition, the sole plate has a suction channel (14) through which cutting debris can be withdrawn.</p> |
