I have a Rh33 w/ a 8000rpm spindle.
The start-up procedure for the spindle is as follows
Run the spindle at 50% of the maximum RPM for 10 minutes.
Measure temperature at various locations on the front of the spindle cartridge.
Be careful as the spindle is running! If at any time during the spindle run-in procedure the temperature reaches 140 degrees Fahrenheit or 60 degrees Celsius, stop the spindle and allow it to cool to room temperature. Resume the procedure at the point of the procedure it was halted.
what exactly does this do? aren't the bearings sealed? also if it heats up after 9 min. i can just resume it for one more minute after it cools off, and it will be o.k.?
I don't really understand exactly whats going on here?