Northland Tool & Electronics is proud to be able to provide spindle repair and spindle rebuilding services across the United States and beyond. Thanks to our blog, we are able to show you images and share stories about spindle repairs such as this Weiss Bridgeport Spindle Repair which came from Knoxville, TN. Or this Mori Seiki CL203B Spindle Repair that came from Chicago, IL.
Kitamura Mycenter 2X Spindle Repair
This customer called and needed a spindle repair done within 5 days. We received the spindle and expedited the breakdown process. The rear roller bearing cage had failed causing the rolling elements to collide causing the spindle seizure. The Belleville washers for the drawbar were damaged and the taper was worn. The spindle repair was evaluated, quoted and approved within 24 hours. The shaft was kiss ground in our grinding department that specializes in spindle repair applications the same day the spindle was approved. Then the spindle went to our assembly area where the technician replaced the bearings and bellevilles. The technician adjusted preload, assembled and ran the spindle. Our quality control department inspected the spindle. The spindle repair was approved by the QC inspection process. The customer was very happy with our quick turn service and how we expedited everything through our facility.
A manufacturer of gears sent us this Gleason GTR250 5 axis CNC Gear Chamfering spindle. Their complaint was the 40 taper was pitted and would not hold the tool accurately. Incoming inspection showed 35 microns of run out in the taper. The grease in the front bearing was washed out, and the rear bearings were contaminated. The shaft rear journal was under sized and the rear housing was over sized. The rear shaft journal and housing were ground, chrome plated and finish ground. The taper was finish ground and had 4 microns of run out. The spindle was then assembled using ABEC 7 precision bearings. Our assembly technician test ran the spindle for 6 hours; pre loaded the bearings and adjusted drawbar force. Quality control then inspected and gave the approval on the spindle.
Makino A81 Spindle Repair
A contract manufacturer was installing their Makino A81 spindle when someone hit the X travel and jammed the spindle into the housing. The spindle was not entirely in the machine so damage did occur. When the spindle was pulled from the machine they found when the shaft was spun by hand the bearings sounded rough. They called Northland Tool and requested an expedited rebuild on their milling spindle. Once we received the spindle it was determined that the bearings would need to be replaced. We also found that the shaft taper needed to be ground, we needed to repair the front nut and we would have to manufacture a new shaft spacer.
Our machinist was able to produce a new spacer and repair the nut within 24 hours. During the machining process we also ground the taper to remove the run out caused by the crash. Our spindle technician carefully assembled the spindle paying special attention to the mating parts to make sure any damage from the crash was repaired. The spindle was test run on one of our custom test run stands. The spindle passed the quality control inspection and shipped out to the customer in 5 days. The cost for this spindle repair through Northland Tool was significantly less than going back to the OEM.
Niigata Spindle Repair
The front bearings on this spindle lost preload causing the spacer to spin. This galled the shaft. The front taper had been ground plate ground in the past and the chrome was chipped.
We ground plate ground the taper removing the old chrome and replacing it with new. We ground plate ground the front spacer and shaft to repair the damage. Once the dimensional work was completed in our grinding department the spindle was rebuilt in our clean room. It then was broken in and test run at 12,000 rpm.
Toshiba BP130 Spindle Repair
We supply bearings for this customer that they keep in stock for this Toshiba Boring Mill. When they perform a machine refurbishment we are able to rebuild the spindle assembly in just a few days. This limits the machine downtime to less than a week and allows them to keep the flow of work through this department at a steady rate. They will call us when they are ready to recondition the next machine and Northland Tool reserves time in our assembly department for exclusively for them. As this is such a key piece of equipment for them we are on call during the process 24 hours a day to answer any questions their personnel may have.
The taper of this spindle had build up causing tool run out. The front bearings were contaminated and the front housing was over sized. All these factors contributed to bad part finish that eventually lead to our customer to send the spindle to Northland Tool for repair.
We ground plate ground the front housing and the 40 taper in our grinding department. The spindle was then assemble in our clean room. The final quality test showed less than 2 microns repeatable run out on a 12 inch test bar over multiple tool changes. This was exactly what our customer needed for his process. View Our Mori Seiki Spindle Repair Page Here.
If you would like more information please call us at 800-774-6353 or CLICK HERE.