| 摘要 |
A device mountable on a thread cutting machine such as a turret lathe or automatic screw machine, generally including a tool holder support member rigidly mountable on the machine, a tool holder member mounted on the tool holder support member for rotatable and axial movement relative thereto, and means disposed on the tool holder member for mounting thereon a thread forming tool such as a tap or die cutting tool. The device is provided with means for accommodating either a right hand or left hand thread forming tool without having to reset the device each time it is desired to change the type of thread being cut.
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