Catastrophic bearing failure was the main cause of this spindle malfunction Continue reading to learn how Northland Tool performed this repair and converted a Weiss GHK 176239 spindle from grease-injected to permanent grease lubrication……Read More
Deckel Maho Gildemeister Franz Kessler Spindle Repair
This Franz Kessler spindle was removed from a DMG (DECKEL MAHO GILDEMEISTER) machine by our customer who is a cnc[...]Continue Reading
This Franz Kessler spindle was removed from a DMG (DECKEL MAHO GILDEMEISTER) machine by our customer who is a cnc retrofitter. The spindle had been crashed and had severe taper damage and a broken drive dog. The bearings had also been brinelled. We were able to replace the integrated drive dog and grind plate grind the taper.
We then assembled the spindle with new ceramic bearings, balanced and test ran the spindle at full speed. After we checked the drawbar sensors and the rotary encoder to make sure they were functioning properly we shipped the spindle. The cost of our repair was less than 40% of the replacement spindle offered by DMG.[...] Hide Details
Upon arrival, every spindle is logged into our production tracking software system. Any issues associated with incoming condition as related to transit are noted.[...]Continue Reading
The spindles are prioritized and moved to either the disassembly technicians or to the spindle run-up room, depending on the circumstances. Our techs carefully break down the spindle into its component parts while meticulously noting their general condition as well as specific damage to them. They also photograph the process and perform a full dimensional inspection to identify excessive wear which may help identify the cause of failure.
Once the initial disassembly and evaluation are completed, the spindle is given a second look by our production manager who reviews & completes the evaluation. He will identify the mode of failure and all pertinent issues, as well as recommended corrective actions. Many evaluations are not complete until the production manager consults with the head of our grinding & machining department. We often have recommendations for additional steps the customer can take to prevent premature spindle failure in the future. We call on our 30 plus years of experience rebuilding spindles to come to these conclusions.
After our purchasing department sources all replacement part costs & lead times, the quote is generated, given a final check and communicated to the customer for approval. Once we have received the approval, production is scheduled and parts are ordered. All spindle parts are carefully cleaned and any grinding or machining operations are completed. Only when all components are available and qualified does the spindle proceed to our spindle assembly technicians. These highly trained professionals assemble all the spindle components and then perform a rigorous break-in process which may include dynamic balancing as well as thermal & vibration analysis depending on the type of spindle. After a final quality control check is performed, the spindle is given back to our shipping department, carefully boxed to minimize the possibility of in-transit damage and shipped back to you, our customer. Hide Details
DMG DMU 80 T Spindle Repair
Our customer indicated that the spindle was crashed and now had excessive runout. The HSK tooling taper was visibly damaged and had 12µ runout in…
DMG DMU 80 P Spindle Repair
This DMG DMU 80 P spindle had bearings that felt very rough when rotated by hand in assembly incoming. The stator (field) passed all incoming…
DMG Mori DMC 1035 V Ecoline Spindle Repair
This DMG Mori DMC 1035 V Ecoline spindle was sent in with the customer stating that the spindle was making excessive noise. When it arrived…
Franz Kessler Spindle Repair
This spindle had been crashed and was sent in to Northland Tool and Electronics for a full breakdown and evaluation. Upon inspection, we noted that…
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Running this spindle too long caused deformed ball bearings and damage to the outer race Damage to the outer race is consistent with prolonged operation after spindle exhibited initial signs of needing to be rebuilt Every spindle rebuilt by North…Read More