GMN TSSV120-60000-5 Spindle Repair
This spindle came to us and was needed back at the customers ASAP. We disassembled and inspected the spindle. All critical spindle components passed quality control inspections except the taper that had 4 microns of run out. Additionally, when we checked the customers tooling we found that it had 30 microns of run out. We contacted the customer and it was determined that the tooling would need a kiss grind.
We kiss ground the tooling, adjusted preload and balanced the spindle. Final quality control showed that the tooling taper now had 3 microns of run out, well within the acceptable range of our customer’s tolerances. The customer had his spindle back within 3 business days. We were able to perform such a quick turn around because we currently employee two certified technicians to run our precision Kellenberger grinders.
Written by Sandy Smith
Matsuura RA3 Spindle Repair
This spindle had oil contamination in the front bearings causing them to overheat and fail. The taper was also worn and had run out. Our customer requested a rush repair as this machine was intricate to his production. We were able to kiss grind the 40 taper on our Kellenburger ID/OD grinder and assemble the spindle with bearings taken from our stock. Having our own grinding department on site makes fast turn repairs like this possible.
Mori Seiki SH500 BIG PLUS
Okuma Howa Millac 4
This spindle was crashed causing the front labyrinths to friction weld together. The taper and front bearing journal had run out. We manufactured replacement labyrinth parts and ground plate ground the taper and front bearing journal.