Geometric measurements - milling machine spindle BT40

     Spindle measurements - checking condition and accuracy. The measurement procedure requires proper equipment to provide meaningful results.
 
      Measurements of runout using a testbar BT40:

     In order to avoid overlapping of testbar runout and spindle runout measurements must be taken at least four angular positions relative to the spindle stem (rotate 90 degrees testbar in taper of spindle).
 
      Measurements runout on the taper and the contact surface with the use of ink:

     Force measurement tools holder:

     It is also important balancing of the rotor, such an operation can be carried out in its own bearings of the spindle (without disassembly directly at the machine) for radial vibration measurement and compensation. I will try to describe the procedure in the following entries.

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