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 MoreWeiss 176191 Spindle Repair
CHALLENGE
Upon receipt of this Weiss 176191 spindle, our technician discovered catastrophic failure of the rear roller bearing caused by coolant contamination, which also damaged the ID of the rear roller housing. The front bearing quad set had excessive grease protruding, which was also slightly contaminated with coolant. The drawbar nut was galled to the rear drawbar shaft threads and had to be cut off. Threads were severely damaged. The shaft tooling taper was worn and pockmarked, and measured with runout of 3-6µ. Gripper fingers were worn and one drive key was heavily damaged.
SOLUTION
The following actions were performed on this Weiss 176191 spindle:
- Clean, inspect overall dimensions
- Convert to standard grease for life bearings and plug grease injection ports
- Grind, chrome plate, and finish grind the rear roller housing
- Kiss grind the shaft tooling taper
- Replace grippers, bellevilles, drawbar shaft and nut, drive dog, seal, 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.
Does your spindle need repair? GET A QUOTE TODAY
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.
It’s a fact of machining — eventually, even top-of-the-line turning machines will experience a spindle failure. Spindles endure tension, torsion, heavy loads, and speeds up to and beyond 150,000 RPM, to name a few of the standard stressors.
Read More