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
Ares Seiki R450S Spindle Repair
The Ares Seiki R450S is a discontinued CNC tapping center. This machine comes standard with a 12,000 rpm spindle and BT30 tooling taper.
This customer experienced a machine crash that caused damage to their Ares Seiki R450S spindle.
Upon our initial inspection, the front bearings felt rough when rotated by hand. The grease did not appear to be contaminated, but the bearings were dry. Further evaluation revealed that the tooling taper ID had significant rub-out damage at the mouth. This customer sometimes uses BIG Plus tooling, requiring this repair to meet specification. The gripper fingers (collet) had significant wear and damage, while the drive dogs (keys) showed normal wear from regular use.
This repair required a grind, chrome plate & finish grind to the tooling 30 taper ID and kiss grind the face to bring back to Big-Plus spec. We replaced all bearings, Bellevilles, o-rings, and assembly screws. The original drive keys were reused. We were not able to obtain new OEM replacement grippers, but the customer was able to provide usable grippers from a different spindle they had in their possession.
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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Running this spindle too long caused deformed ball bearings and damage to the outer race Damage to the outer race is consistent with prolonged operation after spindle exhibited initial signs of needing to be rebuilt Every spindle rebuilt by North…Read More