| 摘要 |
The invention relates to a bushing for supporting screw taps (2), which features a first front seat (10) to be coupled to a shank (3, 3a) of a screw tap, a second rear seat (12) to be coupled to a tool (16, 17; 20, 21, 22) for operating the bushing (1). The bushing allows operating the tap (2) by means of ratchets, wrenches and other tools, so that holes can be tapped even in tight spaces and conditions. |
