coarse thread tap 粗牙丝锥 ; 粗螺纹丝锥
cut thread tap 不磨牙丝锥
acme thread tap 梯形丝锥 ; 爱克米丝锥
metric thread tap 公制螺纹丝锥 ; 米制丝锥
brass thread tap 黄铜螺丝攻
taper thread tap 锥螺纹丝锥
pipe thread tap 管丝锥 ; 管螺纹丝锥
cylindrical pipe thread tap 圆柱管丝锥
thread forming tap 挤压丝锥
Tap limit does not guarantee thread limit for the internal thread after tapping.
丝锥精度不能够保证内螺纹的精度。
During tapping in steel crankshafts, the most commonly encountered problems are "mess tooth" and oversize thread, additionally the tap life is very low.
前言： 钢质曲轴螺孔攻丝加工中经常出现螺纹烂牙、中径扩大等问题，且刀具寿命较短。
Adopting the new method to female thread machining, high hardness of thread can be acquired, and tap broken cases reduce significantly.
采用振动挤压攻丝新方法对钛合金材料进行内螺纹加工，螺纹表面硬度高，丝锥损坏现象显著减小。
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