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 MoreHardinge Conquest-SG-2 Spindle Repair
The Hardinge Conquest SG-2 comes equipped with a grease lubricated and belt driven spindle capable of running up to 6,000 rpm.
CHALLENGE
A long time MTR (machine tool rebuilder) had his own spindle in need of rebuild. He sent the spindle in and we found that the bearings failed from coolant contamination. We also found the OD of front shaft shoulder behind the face flange was drilled full of excessively deep balancing holes. The shaft ID taper, OD taper and face all had dents and rub out damage.
SOLUTION
The following actions were performed on this Hardinge Conquest-SG-2 spindle:
- Clean all parts of the spindle
- Replace all bolts and o-rings
- Replace all bearings, front cover gasket, drive button, and retention screw
- Machine off the front shaft shoulder, install a new shrink fit ring and kiss grind to re-establish a new front shoulder
- Kiss grind the shaft ID taper, OD taper, and face
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 the MTR with a 1-year warranty.
DETAILED CAUSE OF FAILURE
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