The received Spindle mate an accident while in operation. The machine operator and others tried to repair it by emery stone on the machine itself. They could not repair it but the condition of spindle taper got worsened. It hardly left any grinding margin in the spindle bore.

We dismantled the spindle completely. The spindle was ground very carefully and after that hard chrome plating was done to add margin in the spindle bore. Again we applied a finish grinding cut. 

The spindle was assembled and geometrical tests were conducted. The achieved Spindle nose runout was less than 1 micron and runout on a 300 mm test mandrel was less than 4 micron