CA Series Ball and Roller Bearings

 For these reasons, to consistently ensure high turning quality, maintain a safe working environment, and boost production efficiency, it is essential for every machine operator to fully master the correct methods for adjusting machine clearances and other key mechanisms.

Too much clearance in spindle bearings will directly hurt your turning accuracy. The spindle's rotating precision has two key parts: radial runout and axial movement. The two double-row roller bearings at the front of the spindle control radial runout, while the single-row thrust ball bearing at the back handles axial slip.

Check these readings following items 5 and 8 in your machine's Test Certificate. If measurements go past the allowed error limit, you can usually fix it by adjusting just the two front bearings. Here is how: loosen the locking screw on Nut 1 (Figure 12) or Nut 2, make your adjustment, then tighten the locking screw back up. If you still cannot get it right after a few tries, use the same method to adjust the rear bearing. After that, run the spindle at high speed with no load for one hour. Watch the bearing temperature — it should not go over 70°C. If it does, first unlock the screws on Nut 1 and Nut 2, slightly loosen both nuts to reduce preload, and retighten the locking screws once the temperature stabilizes.