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 MoreOkamoto Linear 618B Spindle Repair
The Okamoto Linear 618B is a precision hand fed surface grinder. It comes equipped with a grease lubricated and belt driven spindle capable of running up to 4,250 rpm.
CHALLENGE
This Okamoto Linear 618B spindle had bearings that were noisy when rotated by hand in assembly incoming. After a full breakdown and evaluation, we noted that the grease was washed out of the front bearing pair, remaining grease in the rear pair was severely degraded. The wheel hub retention threads were extremely worn and the wheel hub OD taper was very worn with excessive runout. Lastly, the front and rear shaft centers were damaged. No other dimensional deviations were noted for the repair.
SOLUTION
The following actions were performed on this Okamoto Linear 618B spindle:
- Clean, inspect overall dimensions
- Remove the worn hub retention threads and install a threaded stud
- Rework the rear shaft center
- Grind, chrome plate, and finish grind the wheel hub OD taper
- Replace all bearings, o-rings, and assembly screws
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.
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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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