Catastrophic bearing failure was the main cause of this spindle malfunction Continue reading to learn how Northland Tool performed this repair and converted a Weiss GHK 176239 spindle from grease-injected to permanent grease lubrication……Read More
Hitachi Seiki VS60 Spindle Repair
The Hitachi Seiki VS60 is a CNC vertical machining center. It comes equipped with an oil mist lubricated and stator driven spindle capable of running up to 10,000 rpm.
When this Hitachi Seiki VS60 spindle arrived at Northland Tool and Electronics we completed a full breakdown and evaluation. Upon inspection, we found that the bearings had failed from contamination. The main drawbar tube was cracked in several places where the rotary union sits and the drawbar pull force measured at 1600lbs. Lastly, we noted that the taper needs a cosmetic kiss.
The following actions were performed on this Hitachi Seiki VS60 spindle:
- Clean, inspect overall dimensions.
- Replace bearings, gripper balls, OEM drawtube and drawbar springs, and o-rings
- Kiss grind the tooling taper
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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Running this spindle too long caused deformed ball bearings and damage to the outer race Damage to the outer race is consistent with prolonged operation after spindle exhibited initial signs of needing to be rebuilt Every spindle rebuilt by North…Read More