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美国VNE公司开发了一种用于小螺孔加工的窄小刀片(Mini Thread刀片),该刀片带有双棱车螺纹刃,可车削螺纹的最小孔径为7.3～8.0mm,但要根据加工的螺纹形状而定。该刀片安装在刀杆上,有4种有效长度,最长为43mm。刀片可加工螺距为0.5～2.0mm的所有通用螺纹的全轮廓或部分轮廓。两个切削刃位于刀片的相对面上,当用一个切削刃进行切削时,另一个切削刃可得到很好的保护。这种窄小刀片可采用PVD涂层的高速钢或硬质合金制成,加工出的螺纹质量比攻丝效果好。对于象不锈钢之类的材料,用丝锥加工螺纹常会发生折断现象,如
US VNE company has developed a small screw for machining small blade (Mini Thread blade), the blade with double-edged car threaded edge, the thread diameter of the smallest turning 7.3 to 8.0mm, but according to the processing Thread shape may be. The blade mounted on the arbor, there are 4 effective length, the longest 43mm. The blade can process full or partial profiles of all common threads with a pitch of 0.5 to 2.0 mm. The two cutting edges are located on opposite faces of the insert and the other cutting edge is well protected when cutting with one cutting edge. This narrow blade can be made of PVD-coated high-speed steel or carbide with a thread quality better than tapping. For materials such as stainless steel, tap often thread breakage occurs, such as