The precision of the support bearing of the horizontal milling machine bracket affects the rotation precision of the cutter rod, thus affecting the dimension precision and cylindricity of the hole.
卧式铣床支架的支承轴承的精度会影响刀杆的回转精度，从而影响孔的尺寸精度和圆柱度。
2
Thee outer circle ring rod inner circle without prior processing and has certain precision.
圆棒的外圆和环形件的内圆需经事先加工并具有一定的精度。
3
The interpolation arithmetic will effectively improve the efficiency and precision in the special spiral rod machining, and it provide a new method of the special spiral rod machining.