普通车床钻孔时,如果钻孔的直径较大,或材料较硬时,摇尾座手轮很费力;如果钻细长孔、钻头自身排屑性能又不好、钻头难以冷却,就要频繁地将钻头摇出,带出切屑,同时将冷却液浇到钻头的切削刃上进行冷却,而每次却要记住在刻度尺上的数值,以便再次快速摇进时提前减速以免损坏钻头。因此加工这些零件,工人劳动强度大。 Ordinary lathe drilling, if the larger diameter drill, or the material is hard, the tailstock hand wheel is very laborious; if slender long hole, the bit itself chip evacuation performance is not good, difficult to cool the bit, it is necessary to frequent Shake the drill bit out of the way to remove the chips and at the same time, pour the coolant onto the cutting edge of the drill bit to cool it down, remembering the value on the scale each time to slow down the drill bit before it rams in again to prevent damage to the drill bit. Therefore, the processing of these parts, workers, labor-intensive.