Topper Spindle Rebuild

Jesse Riccardi General Manager

Possible cause of failure:
Bearing failure from contamination in the front and rear.
Rear of spindle covered with dried coolant.
Drawbar and bellevilles are extremely rusted, rotary union may have been leaking if being used.
Taper is very rusted and pitted, sitting well below gauge line and has 80 microns run out.
Spindle nose is equipped with an air purge, but the fitting hole is plugged and not being used.
Rear shaft roller journal is 0/-3 (iso is +2/+9) with this bearing set up it should be around +3.5.
Drive pulley teeth are showing a lot of wear.

Recommended action:
Clean, inspect overall dimensions.
Grind, chrome plate and finish grind the shaft taper and rear shaft journal.
Replace bearings, bellevilles, o-rings, screws, crush rings, gripper balls, and drive pulley
Adjust preload, balance, assemble and break in. Final quality control inspection.
Install air purge when installing the spindle

Jesse Riccardi General Manager

With over 15 years of spindle rebuilding experience, training, and shop management, Jesse specializes in partnering with industry leaders to advance and improve the precision machine service market.