The Bridgeport Torq-Cut 22 is a smaller CNC vertical machining center. It comes fitted with a grease lubricated and belt driven spindle capable of running up to 7,500 rpm.
Read MoreHaas VF-3 Spindle Repair
The Haas VF-3 is a larger version of its counterpart VF-1 and VF-2 machines. This spindle we repaired is a high-speed option from Haas that is belt-driven up to 15,000 RPM and has grease lubrication.
CHALLENGE
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 inspection and disassembly, we found that the main cause of failure was the rear bearing having a disastrous failure. After the spindle was apart, the critical dimensions were measured (bearing journals, bearing shoulders, housings, and taper). No significant dimensional deviations were noted on any critical dimensions, however, the taper was visibly in poor condition.
SOLUTION
The following actions were performed for this Haas VF-3 spindle repair:
- Replace bolts and o-rings
- Replace ceramic bearings
- Kiss Grind the 40 ID taper
- Install new drawbar assembly that was supplied by customer
RESULT
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.
DETAILED CAUSE OF FAILURE
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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.
It’s a fact of machining — eventually, even top-of-the-line turning machines will experience a spindle failure. Spindles endure tension, torsion, heavy loads, and speeds up to and beyond 150,000 RPM, to name a few of the standard stressors.
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