Ares Seiki S-3030 Spindle Repair

Ares Seiki S-3030 Spindle Repair

The Ares Seiki S-3030 is a CNC tapping center.  It comes standard with a grease lubricated and coupling driven spindle capable of running up to 15,000 rpm.

Ares Seiki S-3030 Spindle Repair


When this Ares Seiki S-3030 spindle arrived at our facility, the first thing we noted was that the bearings were noisy when rotated by hand in assembly.  Upon disassembly, we found that the #1 front bearing suffered a catastrophic failure and the cage had broken.  The grease in rear bearing pair was in good condition, but the bearing felt rough when rotated by hand.  Lastly, the gripper fingers (collet) had significant wear on critical tool retention surfaces.  No other significant dimensional deviations were noted (bearing journals/shoulders, housing bores.)



The following actions were performed on this Ares Seiki S-3030 spindle:

  • Clean, inspect overall dimensions.
  • Replace all hybrid ceramic bearings, bellevilles, o-rings, and assembly screws
  • Customer provided OEM gripper fingers (collet) for installation during rebuild



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.


  • Ares Seiki S-3030 Spindle Repair

    Front bearing failure

  • Ares Seiki S-3030 Spindle Repair

    Rotating parts laid out for evaluation

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