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 EC400 Spindle Repair
The Haas EC400 is a horizontal machining center designed for high production, unattended machining. This spindle is grease lubricated, coupling driven, and capable of running up to 12,000 RPM.
CHALLENGE
Our customer sent in this Haas EC400 spindle stating that the spindle was noisy. When it arrived at Northland Tool we noted right away that it was difficult to rotate by hand. After a complete disassembly and evaluation, we recorded that the rear bearings had fretted against the rear housing and that material had gotten into the rear bearings. The front bearings had no grease left in them and the #1 bearing ball cage had disintegrated. We also measured all critical dimensions and noted that the ID taper and front shoulder had high run out.
SOLUTION
The following actions were performed on this Haas EC400 spindle:
- Clean, inspect overall dimensions
- Replace bolts, o-rings, bearings, and bellevilles (to be custom made)
- Kiss grind ID 40 taper and front bearing shoulder
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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