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.
Mitsubishi Spindle Repair
Mitsubishi machine tool referred an aerospace customer to us. The customer had sent the large milling spindle to one of our competitors and the spindle failed shortly after installation. Our spindle repair competitor refused to cover the spindle under warranty even though the spindle failed within days of the installation.
When the spindle arrived we were tasked with finding the cause of failure. Here is what we found:
The front shaft journal was egg shaped and badly scored causing stress to the bearing
The front housing was badly egg shaped and scored causing stress to the bearing
The damage to the shaft and housing were indicative of extremely poor bearing installation practices.
The bearing spacers were scored during the installation causing a non-parallel condition which leads to premature bearing failure.
This spindle had a hydraulic rotor. It was also installed improperly causing scoring to the shaft and rotor and bending the shaft.
The rear cover was in contact with the rear nut causing metal debris to enter the bearings.
The bearings were not installed in the proper orientation causing a lack of lubrication to the front quad set of bearings.
As you can see our competitor was not equipped to perform this repair and actually caused additional damage to the spindle when they worked on it. We have been repairing spindles for over thirty one years and have gained the knowledge and equipment to perform your repair properly. Don’t loose money and machine production time to a company who offers empty promises that they are qualified. Ask for references, warranty policy and make sure you feel comfortable with the company you’re dealing with before you send the spindle for repair.
Omni Turn Spindle Repair
We received this from a company that produces precision parts for the medical, automotive and electronics industries. The spindle had 70 microns of run out in the taper. The customer needed better run out in order to provide their customers with quality parts.
It was determined that the taper would need grind, chrome plate and finish grind. The shaft was sent into our grinding department and they were able to bring the taper back to 2 microns of run out. After assembly and inspection the spindle was sent to the customer. They were very satisfied with the run out on the spindle and its performance in the machine.
This Akira Seiki spindle was sent in from an aerospace defense company. They were having finish problems and need to hold tight tolerances. The rear bearings had failed due to coolant contamination. We recommended that they check their system to help prevent any future contamination failures. We cleaned, replaced bearings, adjusted preload, balanced and did our break in period. The final QC checked taper run out, taper contact, test bar run out, draw-bar force, and end-play. The spindle passed quality control and was sent to the customer. Their finish problems are now gone.
Pibo Multi Spindle Rebuild
Our customer contacted Northland Tool to discuss the repair of their Pibo Multi spindle heads. They were using the OEM in Europe for spindle repair but the deliveries were in excess of 6 to 8 weeks and the pricing was near the cost of a replacement spindle system. When we received their first spindle system for evaluation we reviewed the repair options with them, the cost and lead times they can expect from Northland Tool.
We had to repair some major damage to the aluminum housings. The labyrinth systems for the front of the spindles were worn and not functioning to their full capacity. This let coolant contamination enter through the front and ruin the front bearings.
We repaired the damage and rebuilt the spindle which was shipped 2 weeks after we received approval. The cost of the repair was less than 50% of the price they had been paying the OEM.