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近年来无切削加工的新型内螺纹刀具——挤压丝锥终于大量问世,在国外被誉为“攻丝革命”。苏联已颁布了挤压丝锥、螺母挤压丝锥的国家标准。1985年,日本OSG公司挤压丝锥的生产量已达到丝锥总产量10％以上。在国内,上海及江苏、浙江地区在电器、无线电、仪表行业使用小规格挤压丝锥已经比较普遍。在天津、大连等地,已使用大规格挤压丝锥加工柴油机连杆螺孔。
In recent years, no machining of the new thread cutter - squeeze tap finally come out in large quantities, known as “tapping revolution.” The Soviet Union has promulgated the national standard of squeezing taps and nuts squeezing taps. In 1985, the production volume of the squeeze tap of the Japanese OSG company reached more than 10% of the total tap output. In China, Shanghai and Jiangsu, Zhejiang area in the electrical, radio, instrumentation industry using small size extrusion tap has been more common. In Tianjin, Dalian and other places, large-size extrusion tap has been used to process diesel engine connecting rod screw holes.