N the production of a screw thread by a rolling swaging process using hardened profiled rollers. Rolled threads are stronger than threads machined by a cutting tool 滚丝 [engineering]
The thread rolling tap is made by tool steel or alloy, the precision is H4.
是指用工具钢、合金钢制造的滚牙（或切牙）丝锥， 精度为H4。
Secondly there is error between the thread roll angles of thread rolling die and drill rod.
滚丝轮螺纹和钻杆螺纹的螺旋角有误差。
Jieng Beeing Enterprise Co., Ltd was established in 1972. The predecessor is Taiwan Jieng Gon factory, the first flat thread rolling dies factory in Taiwan.
精斌企业股份有限公司，创办于1972年，其前身为台湾精工厂，为台湾第一家搓牙板生产厂商。
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