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
Haas VF-2SS Spindle Repair
The Haas VF-2SS is a CNC vertical machining center that comes equipped with a high speed spindle. The “SS” stands for super speed and means that the spindle is capable of running up to 15,000 rpm.
This Haas VF-2SS spindle sounded very loud when spun by hand incoming. Upon a closer inspection, we noted that the taper ID had good run out measured incoming, but there was visible damage to the ID and chamfer.
The actuation ring was very difficult to remove from the shaft due to the bolts being worn down and deformed, ultimately they became stuck in the ring. All 3 bearings show signs of contamination and oil from the bearings was dark grey and gritty. There were several bellevilles broken on the drawbar and falling apart when removed from the shaft. After completing the disassembly we then measured the critical dimensions of the spindle. We found that the taper ID had slightly high run out when measured bareshaft (4µ). No other significant dimensional deviations were noted for this repair.
The following actions were performed on this Haas VF-2SS spindle:
- Clean, inspect overall dimensions
- Replace bearings, o-rings, assembly screws, and gripper balls
- Replace drawbar assembly and actuator ring bolts (customer to supply)
- Kiss grind the taper ID and chamfor
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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More Case Studies
Repair History - Here are examples of similar spindle repairs that may contain additional information that will help you. If you have additional questions, please contact us.
Haas VF-0 Spindle Repair
When this Haas VF-0 spindle was disassembled and evaluated, we noted that spindle interior was full of coolant. From this coolant contamination, the grease in… [...]
Haas VF-2 Spindle Repair
Upon arrival to Northland Tool and Electronics, this Haas VF-2 spindle was very hard to turn by hand and drawbar force measured with low retention. … [...]
Haas VF-3 Spindle Repair
When this spindle arrived at Northland Tool and Electronics the first thing we noticed was the spindle was difficult to turn by hand. Upon further… [...]
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