Fanuc Robodrill cartridge spindles are usually just swapped - not much online info about the bearings or innards available. So I've put together a few pics for the benefit of anyone wanting to take a peek. This spindle is from a 2005 D type with standard 10K spindle, newer ones are very similar unless near identical. I'll add more info as the repair progresses.
The spindle was getting noisy (particularly in the 3000RPM area) and had excessive vibration. The top end was out of balance: the flexi-coupling and drawbar actuator had 0.06mm TIR (0.5um allowed). I bought the machine in this condition so I have no idea why.
The top end bearing race has mangled the seating area as you can see from the pics. Runout was still excellent and the spindle felt smooth when rotated by hand but the noise was definitely not normal.
I apologize for the pic quality, these were for our reference only. The order shows the way the parts came off the spindle unit.
Pics: (invented names..)
1 Drawbar fixing system (2 M4 screws, large pin through)
2. Locking Rings
3. End plate
4. Bearing retainer with springs
5. Pressure plate
Regards,
Harri/Finland
The spindle was getting noisy (particularly in the 3000RPM area) and had excessive vibration. The top end was out of balance: the flexi-coupling and drawbar actuator had 0.06mm TIR (0.5um allowed). I bought the machine in this condition so I have no idea why.
The top end bearing race has mangled the seating area as you can see from the pics. Runout was still excellent and the spindle felt smooth when rotated by hand but the noise was definitely not normal.
I apologize for the pic quality, these were for our reference only. The order shows the way the parts came off the spindle unit.
Pics: (invented names..)
1 Drawbar fixing system (2 M4 screws, large pin through)
2. Locking Rings
3. End plate
4. Bearing retainer with springs
5. Pressure plate
Regards,
Harri/Finland