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 More
Hyundai-Kia VX500 Spindle Repair
The Hyundai-Kia VX500 is a CNC vertical machining center. It comes equipped with a grease lubricated and belt driven spindle that is capable of running up to 10,000 rpm.
This Hyundai-Kia VX500 spindle’s bearings felt very rough when rotated by hand in assembly incoming. Coolant contamination was found throughout the spindle interior upon disassembly. When the #4 rear bearing failed, the rolling element cage was destroyed and the debris had migrated to the other three bearings. We removed bearings with steel balls from this spindle, but the decision was made to upgrade to bearings with ceramic balls as removed from (and replaced in) the customer’s other identical spindles. The tooling taper ID was worn with poor and extremely uneven tool contact. The spindle-side half of the rotary union was in good condition, however we recommend replacement of the entire union as best PM practice. We observed no significant dimensional deviations on the bearing journals, bearing shoulders, or in the housing bores.
The following actions were performed on this Hyundai-Kia VX500 spindle:
- Clean all parts of the spindle
- Replace all bolts, o-rings, and gripper balls
- Replace steel bearings with ceramic bearings
- Grind, chrome plate, and finish grind the tooling taper ID
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
Contamination that had entered the area between the front cover and the spindle bearings.
Contamination shown on the outside of the rear spindle shaft.
Spindle disassembled waiting for evaluation for scope of repair
Taper after being ground, chrome plated, and finish ground back to OEM specification.
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