Omlat Torino Spindle Repair
This Omlat spindle had bearing failure. The front shaft journal was undersized and the drawbar threads were bent. In addition to repairing this spindle the customer wanted it converted to be able to use collet toolholding. We modified the shaft to accept a standard collet system. We also provided collets and collet nuts so the conversion was plug and play. The spindle was shipped back to the customer with our standard 1 year warranty.
Fuji Lathe Head Spindle Repair
This spindle had reached its estimated life span and was sent to us for a preventative maintenance check. We test ran the Fuji spindle on our custom test stand and determined through vibration analysis the bearings were near the end of their lifespan.
We cleaned and inspected the overall dimensions of this Fuji Lathe Head. We replaced the bearings, adjusted the preload, balanced, assembled and broke in the spindle. It was then checked by our QC department and shipped back to the customer.
The Fuji machines at this customer location are very important to their process and can have only limited downtime. By repairing their spindles before catastrophic failure they are able to plan downtime and receive much shorter lead times due to a reduced scope of work needed to repair the spindle.
Spindles sent in for preventative maintenance also receive our standard warranty.
Fischer HJN-828 Spindle Repair
This is a good example of a straight spindle repair. We received this spindle, broke it down, cleaned and the inspected the overall dimensions. We replaced the bearings, adjusted the preload, balanced, assembled and broke in the spindle. We then checked the spindle during the final QC inspection. Once all this was complete we shipped the Fischer HJN-828 spindle back to the customer.
Jung Surface Grinder
After breaking down this spindle to clean and inspect the overall dimensions we determined that the cause of failure was contaminated front and rear bearings. The front housing was egged with 7 microns of runout and was tapered.
We repaired this Jung surface grinder by replacing the bearings. We ground plated and reground the front housing in addition to our standard repair process.
GMN TS80CX142 Anka spindle repair
Northland Tool & Electronics repairs several types of Anka spindles. This one in particular is a specialty of ours. We are equipped to grind the tooling interfaces in our grinding department. Special fixtures and processes have been made to make sure the HSK style tooling functions properly on the spindle repair.
The tooling locates on the taper and the face of the spindle. The face is also the nut that captures the bearings on the shaft. Since it is a nut and bearings have a loose width tolerance these spindles need to be ground to ensure proper tooling contact. We have seen many spindle repairs that were performed by our competition that were done incorrectly because they lack the proper equipment.
Mori Seiki MH-630 spindle repair
This spindle came in with the coupling for the drive motor attached to the rear of the shaft. Our incoming evaluation found the mating surfaces of these two parts was fretted and out of specification. This was causing vibration in the spindle resulting in poor part finish. This is one of the reasons we request you send as many of the rotating parts of the spindle that is reasonable. If we had not received the coupling and addressed the wear, the lifespan of the repair would have been reduced from the strain of the vibration and wear.
We ground plate ground the spindle shaft and the spindle drive coupling as a matched set. We replaced the bearings, adjusted preload, balanced, assembled and broke in the spindle before sending it through our vigorous QC process. View Our Mori Seiki Spindle Repair Page Here.
Heald 405 Spindle Repair
This spindle came with front bearing failure from contamination. The pilot had 22 microns runout and was oversized by 13-23 microns. Rear pulley taper had 60 microns runout. Front and rear journals are tapered and undersized by 3-4 microns. We ground plate ground the shaft pilot, front and rear journals. We also kissed ground the rear taper and the damage before the taper. Before the spindle was shipped back to the customer we adjusted preload, balanced, assembled and broke it in. View Our Heald Page Here.
Mori Seiki CL203B
The initial concern for this customer was the sound of the bearings during rotation. Upon further inspection the temperature of the spindle had elevated. This was caused by contamination in the bearings, both front and rear.
Our evaluation showed run out in the taper and face on the front of the shaft. We kiss ground the tooling interface in our grinding department. The spindle repair was then moved to our clean room were it received a complete rebuild and replacement of all wear items including bearings. We adjusted the preload, balanced, assembled and sent the spindle through our final QC inspection. Once all this was done the spindle was returned to the customer. View Our Mori Seiki Spindle Repair Page Here.
Jagura Spindle Repair
This customer sent in a Jagura spindle for repair as it was no longer providing them with the part finish they desired. Our evaluation found the front bearings were contaminated causing bearing failure. The tooling taper had 10 microns of run out and the pulley taper had 4 microns of run out. All these are factors contributed to the poor part finish.
We were able to kiss grind the shaft for the spindle repair on one of our Kellenburger grinders. The parts were cleaned and the spindle was assembled in our clean room. We test ran the spindle at the increased speed rating and trim balanced it. All run outs were checked and a final vibration analysis performed.
As an upgrade we recommended replacing the stock steel bearings with ceramic bearings. This allowed them to increase the spindle speed and increase the lifespan of the spindle.
Matsuura MAM700 Spindle Repair
A spindle failing during a customer’s busy time is not good thing. Our customer called and needed this spindle repair done as soon as possible. We received the spindle and found that the shaft nose OD rubbed out on the front cover. The shaft taper had 18 microns of run out and the front bearings were contaminated. The spindle would need grind, chrome plate and finish grind to the taper, a kiss grind to the OD nose and front cover. We expedited the shaft rework through our Kellenberger grinding department. The shaft was then hand carried to the platers and picked up the following day. The shaft was put on the Kellenberger grinder the same day that it was picked up. Our spindle repair technician replaced the drawbar, springs, grippers, bearings and orings. The taper now has only 1 micron of run out. All out going test show that the spindle had good balance and drawbar force. The customer received their spindle repair back within 4 days.