Northland Tool Blog
Heald Red Head 405 Spindle Rebuild

Heald Red Head 405 Spindle Rebuild

Possible cause of failure:
All bearings are contaminated.
Front and rear shaft journals, shoulder and pilot are not at ISO.
Rear pulley taper area and face are marked up.
Rear shaft nut is loose, the rear bearing spun on the shaft.
Tool and pulley are bent.

Recommended action:
Clean, inspect overall dimensions.
Grind, chrome plate and finish grind the journals and pilot.
Kiss grind the shoulders, pulley taper area and face.
Replace bearings, pulley, and bolts.
Adjust preload, balance, assemble and break in. Final quality control inspection.