无槽丝锥,与用切削加工方法制造内螺纹的普通丝锥不同,它是一种通过金属塑性变形来制造内螺纹的工具。因而,它具有普通丝锥所不具备的各种特性(表1)。而且,无槽丝锥主要适用于加工铝合金铸件、锌合金铸件、软钢以及其它延伸性好的金属,但在最近由于无槽丝锥切削油剂的改进以及攻丝条件的改善,使用范围开始扩大起来,也部分地用于加工合金钢和炭素钢等材料。 Slotless taps, unlike ordinary taps that make internal threads by cutting, are tools that create internal threads through metal plastic deformation. Thus, it has all the features that ordinary tap does not have (Table 1). In addition, slotless taps are mainly suitable for processing aluminum alloy castings, zinc alloy castings, mild steel and other ductile metals. However, the use range has been expanded recently due to the improvement of tapping cutting fluid and tapping conditions Up, but also for the processing of alloy steel and carbon steel and other materials.