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该攻丝器是一种新型的孔螺纹加工工具。其(?)点综合了以往攻丝机和简易攻丝夹头的优点,体(?)小、通用性强、攻丝范围大、摩擦离合器有保护装置等。并能在钻床不反(?)的情况下,提拉钻床操作手柄,丝锥便可退出。此攻丝器结构如图所示。外形尺寸为φ72 × 170mm;攻丝范围在M3～M6之间;攻丝转速根据不同的丝孔直径,在60～80r/min间选择。它可提高工作效率数倍至数十倍。
The tapping machine is a new type of hole thread processing tool. It combines the advantages of the past tapping machine and the simple tapping chuck, small size, high versatility, large tapping range and protection device for the friction clutch. And in the case of drilling is not anti-(?), Pulling drilling operation handle, the tap can exit. This tapping structure as shown. Overall dimension is φ72 × 170mm; tapping range is between M3 ~ M6; tapping speed is selected from 60 ~ 80r / min according to different wire hole diameter. It can improve work efficiency several times to several times.