CNC lathe spindle – what the innards look like
The accuracy and life of a CNC lathe spindle depend on the material, the accuracy of manufacture, and the quality of the bearings. A better spindle gives you better better quality of parts and higher machine life. A better spindle also costs more money. So when machine X costs more than machine Y although they are the same size, it is probably because X has better build quality. Keep this in mind when buying a machine, instead of merely deciding on the cheaper machine.
1: Spindle lock nut
2: Spindle
3: Double row cylindrical roller bearing
4,5: Headstock housing
6: Angular contact ball bearing / Taper roller bearing. Prevents axial movement of spindle. 7: Double row cylindrical roller bearing
8: Labyrinth cover
9: Spindle bore
10: Spindle
Data courtesy: Micromatic Machine Tools Pvt. Ltd.
