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 MoreAkira Seiki SV760 Spindle Repair
The Akira Seiki SV760 is a CNC vertical machining center capable of 3-axis production machining. This machine comes equipped with a pulley driven and grease lubricated spindle capable of running up to 15,000 rpm.
CHALLENGE
When this Akira Seiki SV760 spindle arrived at Northland Tool and Electronics the first thing we noted was that the bearings were noisy when rotated by hand. Upon trying to evaluate the spindle we found that the front shaft nut was stuck and had to be machined off to continue the disassembly. Once taken apart the spindle interior was found to be contaminated with an oily dark brown sludge. The front ceramic quad set bearings were heavily contaminated with this sludge and all bearings felt rough when rotated by hand. It was also noted that the tooling taper ID was in poor cosmetic condition with signs of severe wear. No other significant dimensional deviations were noted on any critical surfaces (bearing journals/shoulders, housing bores, etc.)
SOLUTION
The following actions were performed on this Akira Seiki SV760 spindle:
- Clean, inspect overall dimensions.
- Kiss grind the tooling taper ID.
- Replace all bearings, front shaft nut, Bellevilles, o-rings & 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.
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.
Spindle contamination is a critical issue that can significantly impact the performance and longevity of your machinery.
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