Changing the drill chuck (see figure C)

A securing screw (10) protects the keyed chuck (1) from being accidentally separated from the drill spindle.

Open the keyed chuck (1) fully and unscrew the securing screw (10) clockwise. Note that the securing screw has a left-hand thread.

When the securing screw (10) is securely seated, place a screwdriver on the screw head and undo the securing screw by hitting the handle of the screwdriver.

To remove the drill chuck (1), place an open-ended spanner (SW 17) onto the nut on the drive spindle.

Hold the keyed chuck firmly in one hand and use your other hand to turn the open-ended spanner anticlockwise until the drill chuck comes away from the drill spindle cone.

  • Keep the cone of the drill spindle and the hole of the drill chuck free of grease and dirt.

To install the keyed chuck (1), turn the nut on the drive spindle clockwise as far as it will go.

Push the keyed chuck onto the drive spindle until it is securely seated, but do not use force when doing so.

Use a rubber hammer to lightly hit the front side of the keyed chuck (1) in order to ensure that the keyed chuck is securely seated. When doing so, ensure that the clamping jaws of the keyed chuck do not protrude to avoid damaging the chuck.

Screw the securing screw (10) anticlockwise into the open keyed chuck. Always use a new securing screw because a securing adhesive substance is applied on its thread and is rendered ineffective after repeated use.