Gamfior Spindle Repair
Northland Tool & Electronics repairs all types of Gamfior spindles from High speed ID grinding to high horsepower milling spindles. Since Gamfior is no longer producing machine tool spindles and they spent the last few years of their business life owned by different companies it can sometimes be hard to find a qualified rebuilder for your spindle. Northland Tool & Electronics has years of experience with Gamfior spindles and you can depend on us for a quality repair.
Gamfior Models We Commonly Repair
Gamfior E13666M Spindle Repair 18,000 rpm HSK TaperOur customer sent us this spindle from his Fidia machine because the spindle was not able to hold the tight tolerances needed for his operation. He was using the OEM for repairs but the cost and long lead times were prohibitive. The design of this Gamfior spindle is very unique. The spindle incorporates a two-piece shaft design that must be carefully taken apart to remove the front bearings. Special tooling was manufactured in our machine shop in order for us to disassemble and reassemble the spindle. Upon inspection it was found that one of the shaft pieces was ground incorrectly from a previous rebuild. This caused the two shaft pieces to misalign and ultimately led to the failure of the spindle. We ground; chrome plated and finish ground the shaft piece and the HSK taper. The spindle was assembled, run up at the customers running speed and balanced. The spindle passed all quality control checks.
Gamfior GTI HNA75Gamfior ID grinding spindle This is a 75,000 rpm ID grinding spindle manufactured by Gamfior and relabled by GTI Spindle. Our incomming evaluation showed bearing wear and an oversized pilot. We ground plate ground the pilot and assembled the spindle in our clean room. It was then test run at 75,000 rpm and it passed our final QC requirements.
Gamfior E13833 24,000 rpm HSK Taper
Our customer was having continuous failures on this type of spindle in their plant. The spindles were only lasting 2 to 3 months between repairs from the previous vendor. Our incoming evaluation showed that the previous rebuilder had not been holding the proper tolerances on the shaft and housing dimensions. This particular spindle failed because they had ground plate ground the ball cage housing to tight and with poor surface finish. The shaft was unable to properly expand which loaded the bearings causing the premature failures. Spindle OEM’s have varying specifications of bearing tolerances on spindles to accommodate the speed and load characteristics needed from the spindle. Rebuilders need to be aware of and understand these design properties to incorporate them in the repair plan. If a rebuilder uses the “ISO spec from the book” or outside vendors for grind plate grinds poor spindle life will be the result.
Gamfior DIS8614 Belt driven Grease lubricated Grinding spindle
The cause of failure to this spindle was destruction of the rear bearings. Our evaluation found that the belt tension was to high and the forces exceeded the bearings radial load capacity. We rebuilt the spindle and visited this customer to review proper installation procedures. The installation technician was unaware that setting the proper belt tension was important. We instructed him how to set it and discussed several other items that could be addressed to increase the life of their spindles.
Gamfior E13779M 24,000 rpm HSK Taper
This spindle is from a Fidia 5 axis milling machine. It was crashed causing damage to the HSK taper and the front bearing journal. We ground plate ground the taper, replaced the grippers and ground plate ground the front bearing journal. We then balanced the rotating components, assembled the spindle test ran it at speed and trim balanced it. The repair cost was less than 30% of a new purchase and we were able to get the Fidia machine running for our customer in less than 2 weeks. They were quoted an 8 to 10 week delivery from the dealer.
Gamfior DISE12371 120,000 rpm Stator driven ID Grinding Spindle
This spindle was crashed destroying the front nut and bearings. The pilot and face had run out. We manufactured a new front nut in our machining department. We ground plate ground the pilot and kiss ground the face. We then assembled the spindle, ran it at 120,000 rpm and balanced it.