13
Check the concentricity of rotation of the bur by operating the micromotor. Assess
whether the bur is rotating concentrically. There should not be any vibration;
If the micromotor shows any signs of vibration, the position of the chuck must be
adjusted. Use the chuck tool to turn the bur and chuck a few degrees in a counter-
clockwise direction, (as outlined in the above instructions). In order to find the
ideal position, it may be necessary to repeat this operation several times, taking
care however not to loosen the chuck too much;
Once the ideal position has been found, the chuck must be locked in place by using
the triangular key wrench to tighten the internal micro adjustment screw. Secure
the chuck using the chuck tool. Insert the triangular wrench key into the chuck
and turn the micro adjustment screw clock-wise. Make sure that the chuck
remains in the correct position.
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