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 MoreDaewoo 8HC Spindle Repair
The Daewoo 8HC is a medium sized CNC turning center. It can come fitted with this grease lubricated and pulley driven spindle that is capable of running up to 4,500 rpm.
CHALLENGE
Our customer sent in this Daewoo 8HC spindle stating that the spindle had a small crash and then it started making noises. Once the spindle arrived at Northland Tool we completed a full disassembly and evaluation.
This is what we found:
- Front thrust bearings were brinelled
- Rear roller bearing was heavily contaminated with a brown particulate (Pic 1)
- Although the spindle suffered a slight crash the Lathe taper and face had run out with in specification
SOLUTION
The following actions were performed on this Daewoo 8HC spindle:
- Clean, inspect overall dimensions
- Replace bolts, o-rings, and bearings
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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