Seida 8480 Spindle Repair

Seida 8480 Spindle Repair

NTE has been rebuilding spindles for over 30 years. We handle many types of spindles and this is the first Seida we have ever seen. This Seida 8480 spindle is used for optic fabrication and is a very low rpm with a Lovejoy Drive.


This Seida 8480 was sent in for a full breakdown and evaluation of the spindle.  After a close inspection, we noted that a rear nut had tightened up on the preload washer.  This caused the bearings to fail prematurely.  The front pilot shoulder had significant runout and needed to be addressed.  No other dimensional deviations were noted for this repair.



The following actions were performed on this Seida 8480 spindle:

  • Clean all parts of the spindle
  • Replace o-rings and assembly screws
  • Replace bearings with shielded precision bearings
  • Kiss grind the front pilot shoulder



After reassembly of all components, adjusting bearing preload, and undergoing break-in and testing procedures, this spindle passed our final quality inspection before being returned to our customer with a 1-year warranty.

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