Bridgeport Torq-Cut 22 Spindle Repair

Bridgeport Torq-Cut 22 Spindle Repair

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.  This specific spindle came from the Lee’s Summit, FRC 1987 Broncobots.  They are a high school robotics team that manufactures a robot each year for competitions across the country.  These competitions include having the robot complete certain tasks like picking up and placing cones/boxes or balancing on a platform.  The Broncobots were looking to get the bearings replaced and the taper ground with the end goal of holding tighter tolerances on their parts.

Bridgeport Torq-Cut 22 Spindle Repair

CHALLENGE

We got in contact with the mentor for the Lee’s Summit, FRC 1987 the Broncobots and decided we would help them out with their Bridgeport spindle issues.  He stated that the spindle had recently gone out and was in dire need of new bearings and a spindle taper regrind.

Bridgeport Torq Cut 22 Spindle Repair

Incoming Spindle

Once the spindle arrived at Northland Tool and Electronics we completed a full breakdown and evaluation.  We found that the spindle spun by hand but the bearings felt rough and were noisey.  The 40 taper id was in poor condition with rust, pock marks, and high run out.

Bridgeport Torq Cut 22 Spindle Repair

Taper Condition Before

There were multiple broken bellevilles in the drawbar assembly and the outer flange of the encoder pulley was severely bent.

Bridgeport Torq Cut 22 Spindle Repair

Broken Bellevilles

Bridgeport Torq Cut 22 Spindle Repair

Bent Encoder Pulley

Lastly the rear roller bearing had little to no grease left and the front bearings grease has become discolored from age.

Bridgeport Torq Cut 22 Spindle Repair

Rear Roller Bearing Condition

 

SOLUTION

The following actions were performed on this Bridgeport Torq-Cut spindle:

  • Replace all bolts, bearings, orings, bellevilles, and clean entire spindle
  • Grind-Plate-Grind the 40 taper ID
  • Make new flange ring and install on rear pulley

 

RESULT

After reassembly of all components, adjusting bearing preload, and undergoing break-in and testing procedures, this spindle passed our final quality inspection and was returned to the FRC 1987 Broncobots with a 1-year warranty.

Bridgeport Torq-Cut 22 Spindle Repair

A note from the Mentor of the Broncobots:

“It has been quite the successful season for the team as we won both of the local regionals that we competed at; both in Olathe, KS and at our home event we hosted at our high school. The rebuilt spindle definitely contributed to our success this year as the students decided to pursue a complex design that required tight fits between different components on our robot’s telescoping arm which I was able to help them execute much more easily than in past years.”

 

 

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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.

I really didn’t expect this; You guys really pulled it off! My many thanks to your outstanding crew for helping us get back into production.
— Dan Eaton, Taylor Metalworks
Its great not to be sending spindles out on a regular basis since you addressed my problems, but I know they will still be coming sooner or later. Never a problem when we get them back , run better than new. Hope everything is ok there. Please tell everyone there that we here appreciate everything that you do to keep us up and running and the quick turnarounds. Have delt with the rest now deal with the best. Have a great week end and up and coming holiday.
— Northland Customer
Thank you NTE just received spindle today and WOW ! what a nice job. Can’t wait to use it. Thank the Northland team for us for a job well done 
— Northland Customer
Both of the spindles that you repaired are on the machines and running great. We don’t have any spares for those grinders. We probably will not be purchasing a spare, as you have been able to turn around the repairs quickly and the price of a spare is cost prohibitive.
— Northland Customer
I am writing to thank Northland Tool for going the extra mile and saving my company from expensive machine downtime and expensive repairs. We have always sent our Chiron spindles for repair as a shaft with bearings. None of our previous rebuilders pointed out the bearing fretting or the fact that the housing in the machine was out of tolerance and causing premature failure to the spindles. After Northland fixed the housings the spindles have never sounded as good or run as well! Great job guys!
— Northland Customer
The detailed cause of failure reports and the expert technical advice that Northland Tool provides is bar none the best I have ever seen. We struggled to keep two of our large our milling spindles running for longer than 6 to 12 months. Northland Tools evaluation showed that the hydraulic nuts were not holding the assembly together causing premature spindle failure. We discussed this in detail and mutually decided to modify the spindle shaft to prevent this from occurring again. The first spindle we performed this on is still in the machine running like new after 3 years. That’s over three times the life of previous repairs and it’s still going strong. Easily over $40,000.00 of savings so far on that one machine and counting.
— Northland Customer
Your people go above and beyond the call of duty when it comes to spindle repair. When we had difficulty with the spindle installation and we were able to talk directly to a spindle technician that helped us troubleshoot the issue it helped us out of a bind. We have sent several spindles to you and have nothing but great things to say.
— Northland Customer
Thank you for your attention with my quick turn spindle repair. Your status updates allowed me to plan around machine downtime and I now know that you deliver on your promises. In the past other spindle repair vendors talked a big game and consistently failed to deliver. You not only delivered my spindle before the due date but you kept me informed throughout the entire repair process.
— Northland Customer
You performed a miracle with my BIG PLUS spindle. After crashing the spindle severely damaging the taper we found that a replacement spindle was not only cost prohibitive but had a long delivery. Your repair was a fraction of the cost of new and you never would know that the spindle was damaged to the extent it was.
— Northland Customer
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