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 MoreCincinnati FTV640-2500 Spindle Repair
The Cincinnati FTV640-2500 is a large CNC vertical machining center. It can come fitted with this oil mist lubricated and pulley driven spindle that is capable of running up to 8,000 rpm.
CHALLENGE
Our customer sent in this Cincinnati FTV640-2500 spindle stating they were measuring excessive runout and low clamping pressure. Once the spindle arrived at Northland Tool we completed a full disassembly and evaluation.
This is what we found:
- Spindle was seized prior to incoming
- Rear #3 bearing ball cage was shattered in a few different places and caused the spindle to seize (Pic 2)
- ID 40 taper had high run out and measured “AT Wrong” on our air gauge
- The grippers were severley worn which would add to the low clamping force along with the bad taper (Pic 1)
SOLUTION
The following actions were performed on this Cincinnati FTV640-2500 spindle:
- Replace Bolts, O-rings, Bearings, Grippers, and Bellevilles
- Grind-Plate-Grind ID 40 taper due to high run out and poor contact
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.
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