Catastrophic bearing failure was the main cause of this spindle malfunction Continue reading to learn how Northland Tool performed this repair and converted a Weiss GHK 176239 spindle from grease-injected to permanent grease lubrication……
Read MoreKitamura Mycenter 2Xi Sparkchanger Spindle Repair
The Kitamura Mycenter 2Xi Sparkchanger is a compact CNC vertical machining center. It comes equipped with an oil mist lubricated and gear driven spindle capable of running up to 15,000 rpm.
CHALLENGE
The Customer did not provide the drawbar assembly nor the drive gear and mounting hardware. After disassembling the spindle, we noted that the rear roller bearing was approaching failure, there was evidence of high heat and it spins very hard. The front bearings also felt rough and were noisy when rotated by hand. Lastly, the tooling taper ID had some wear on it with high runout. No other significant dimensional deviations were noted (bearing journals & housing bores.)
SOLUTION
The following actions were performed on this Kitamura Mycenter 2Xi Sparkchanger spindle:
- Clean, inspect overall dimensions
- Kiss grind the tooling taper ID
- 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.
DETAILED CAUSE OF FAILURE
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