Applies to: Z4

Cleaning the collet chuck of the blank holder

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NOTICE

Damaging of the block holder when using the wrong torque screwdriver or performing the maintenance with the machine switched off

If you use a torque screwdriver other than the one included in the scope of delivery, or if you perform the maintenance with the machine switched off, the block holder can get damaged.

  • Ensure that the machine is switched on during the entire duration of the repair.
  • Only use the provided torque screwdriver.
  • Ensure that you apply a maximum torque of 1.8 Nm.

The grease for the collet chuck of the spindle and for the collet chuck of the blank holder is the same item.

  1. Have ready:
    • Block holder service set
    • Collet chuck grease

    2.  

    1. Torque screwdriver (1.8 Nm)
    2. Cleaning cone
    3. Cleaning brush
    4. Tube of collet chuck grease
  2. Switch on the machine at the main power switch.
  3. Open the working chamber door.

  4. Insert the insert of the torque wrench into the collet chuck and hold it in place.

    1. Place the torque wrench on the insert and remove the screw.

    2. Remove the collet chuck from the blank holder.

       

       

  5. Clean the inner cone of the blank holder with the cleaning cone of the service set.
  6. Clean the collet chuck with the brush of the service set.
  7. Clean the outside of the collet chuck.
    8. NOTICE

    Damaging of the collet chuck when using the wrong grease or applying the grease incorrectly

    If you use unsuitable grease or if grease gets into the longitudinal slots of the collet chuck, the machine may get damaged.

    • Before applying the grease, ensure that the collet chuck is perfectly clean.
    • Ensure that no grease gets into the longitudinal slots of the collet chuck.
    • Only use a very small amount of grease, less than the size of a pinhead.
    • Only use the provided grease of the service set.
  8. Grease the collet chuck. Apply the grease only to the conical surface (marked blue) of the collet chuck. Keep the slot (marked red) free of grease.

    9.  

  9. Check the condition of the fixing screw and replace it by a spare screw if necessary.
  10. Push the collet chuck with fixing screw into the blank holder as far as you can. Twist the collet chuck until it snaps in place and is properly seated. Depending on the position you may need to twist it up to 360°.

    11.  

  11. Insert the insert of the torque wrench into the collet chuck and hold it in place.
  12. Place the torque wrench on the insert and tighten the screw.