Matsuura RG3II Spindle Speed Upgrade


Cause of failure: Catastrophic failure of rear roller bearing, cage was disintegrated. Bearing is not rated to consistently run near 10k RPM. Rear Spieth nut has damage from repeated removal from a previous vendors repair. Chrome in shaft tooling taper is flaking, taper has uneven tool contact.


Repair action: Clean, inspect overall dimensions. Grind, chrome plate & finish grind tooling taper. Upgrade to high-speed rear roller bearings & small ball ceramic pair in front to enable 12,000 RPM operation. Replace Spieth nut, o-rings & assembly screws. Adjust preload, balance, assemble and break in. Final quality control inspection.


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