| 摘要 |
The reaming tool, designed to ream a hole in a workpiece from the inside, consists of an oval cutter (13) which is pivoted to a holder (11) on the end of a tool shank (27) containing a spring-loaded rod (8). The shank is in two telescopic sections (26,27), and the tip (10) of the rod inside it is shaped to hole the cutter in line with the shank as the end of the tool is inserted through the hole in the workpiece to be reamed. Once the end of the cutter holder is through the hole the telescopic sections are released. This allows the rod to withdraw, so that the cutter turns into a position across the hole and is able to ream it when rotated. |
