Carlo De Giorgi Blue Sky 637/00 Manual De Instrucciones página 28

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With reference to Fig. 3:
If collet (B) fails to open after lever (A) has been turned through 90°, or if
the tool is insufficiently clamped when the lever is in the "locked" position,
adjust as follows:
- turn lever (A) through 90° to bring the collet to its maximum extension
position;
- immobilize handpiece spindle (C) with a cross tool;
- insert a 1.5mm Allen key in the collet (B), locked to the shaft base (C) by
an Allen screw;
- loosen this screw with the Allen Key by a half turn in a counterclockwise
direction. This will release the collet (B);
- to adjust clamping force, turn the collet with your fingers: clockwise to
increase or counterclockwise to reduce;
- use the Allen key to tighten the screw which locks the collet;
- remove the cross tool to release the spindle.
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The handpiece can be removed, exclusively when the motor is stopped,
by turning it counterclockwise until it is detached from the motor.
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