2. Bearing Selection, and Shaft and Housing Design
(1) Type of Machine (2) Main spindle orientation (3) Diameter and size of main spindle NC Lathe, machining center, grinding machine, etc. Vertical, horizontal, variable-direction, inclined, etc. #30, #40, #50, etc. (4) Shape and mounting-related dimensions of main spindle (6) Slide system free side (7) Lubrication method (8) Drive system