欧美日韩精品免费观看视频,国产精品国产三级国产在线观看,美女爽到高潮久久久,精品国产视频一区二区三区,日韩内射久久一区二区,青青草日韩视频在线观看,日韩精品一区二区视频,亚洲日本一品道一区二区三区,国产老妇伦国产熟女老妇高清,国产精品一区二区乱码

Tap, the main force for torque, and tap the cutting force by different with other tools, it is not affected by the feed mechanism of machine tool control and used for tapping chuck connection machine and tap plays a crucial role in the tapping process.

The commonly used vintage tapping chuck. It consists of a chuck body parts, clutch parts, butterfly spring, the top parts, adjusting nut, chuck seat parts. When working, through adjusting nut butterfly spring pressure, locking clutch completion. Because the tapping chuck drive system is simple, with low precision, no security system, so can only be used in general machine and equipment, and can not guarantee the tap does not break when tapping; through the adjusting nut tightening, control the size of pressure, but no accurate data labeling, so when tapping, tapping blocked, encounter hard material tap slip, can rely on the experience to adjust the nut, increase the pressure; when the tapping torque is greater than the pressure generated when the butterfly spring, clutch engagement between will produce loose and disengaged, if chuck installed in the automatic feeding machine, it will cause the tap is broken, affecting the quality of the products.