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
Toyo HFD05-57 Spindle Repair
The Toyo HFD05-57 is a high speed grinding spindle that is oil mist lubricated and stator driven. It is capable of running up to an astonishing 50,000 rpm.
Our customer has a large population of these high speed grinding spindles which are used in the production of tapered roller bearings for automotive axle and transmission systems. The cause of failure of the hybrid ceramic bearings was typical for this spindle: heavy contamination of the front pair with grinding swarf. The contamination did migrate to the rear pair, which were also beginning to approach failure. The spindle motor passed all incoming tests, but we did notice a groove worn into the ID of the quill pilot. There were no other significant dimensional deviations of the bearing journals and shoulders, or in the housing bores.
We completed a grind, chrome plate, and finish grind to remedy the groove in the ID of the quill pilot, and component balanced the shaft assembly on the Schenck balancer. We rebuilt the spindle with all new hybrid ceramic bearings, gasket, o-rings, and assembly screws.
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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Toyo HFB03 Spindle Repair
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Toyoda FA550-11 Spindle Repair
This Toyoda FA550-11 spindle arrived to our facility in rough condition. Upon inspection, we noted the taper and OD of the shaft nose were damaged… [...]
In this helpful guide to spindle bearing preload, Northland Tool & Electronics will answer all the basic questions about your spindle bearing preload calculations.Read More