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 MoreDoosan Lynx 220A Spindle Repair
The Doosan Lynx 220A is a 2-Axis CNC Universal Turning Center. It can come with optional milling/drilling functions and a sub spindle. Here we repaired the main lathe spindle with is grease lubricate, belt driven, and capable of running up to 6,000 RPM.
CHALLENGE
Our customer sent in this Doosan Lynx 220A spindle stating that the spindle was running without issues before the weekend and was seized upon return on Monday. After a fully disassembling the spindle we noted that the front labyrinth spacer and front cover were seized together by excess debris and rust. We also found that the front and rear bearings were contaminated with a brown particulate. We then completed a full critical surface evaluation and recorded high runout on the rear bearing journal shoulder. No other dimensional deviations were noted.
SOLUTION
The following actions were performed on this Doosan Lynx 220A spindle:
- Clean, inspect overall dimensions
- Replace bolts, bearings, and o-rings
- Kiss grind the rear bearing journal 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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