See how to dial in the back of a spindle shaft using a spring punch in order to stop unacceptable run-out.
Bill Murphy of C & M Precision Spindle goes over a less common but helpful process of dialing in the back of a precision spindle, in this case a Matsuura 20,000 RPM. He uses a spring punch to take stress out in the nut (here a KTM-12). Stress can build up in nuts on the threads since they are helical planes.
Tools used in the video: