How to unlock the chuck of the Makita HP2071 percussion drill when it is stuck and no longer turns?

Q: How to unlock the chuck of the Makita HP2071 percussion drill when it is stuck and no longer turns?

The Makita HP2071 percussion drill is equipped with a keyless chuck (with a ring and sleeve). During normal use, you should grasp the ring and turn the sleeve counterclockwise to open the jaws, then clockwise to tighten after inserting the drill bit. If the chuck is stuck because a drill bit is jammed in the jaws and you cannot loosen it with the sleeve alone, the official Makita manual prescribes the following procedure: Firmly grasp the handle of the chuck with a pair of pliers or a similar tool. Important: do not grasp by the fixing ring , only by the cylindrical handle. Place an appropriate wrench (19mm wrench, adjustable wrench, or equivalent) on the hex nut located at the front of the chuck (visible under the chuck). Turn the wrench clockwise to gradually loosen the stuck chuck. This procedure uses the leverage effect of the wrench on the hex nut to create sufficient loosening force. The wrench should be proportionate to the diameter of the hex nut for safety and efficiency. If after this operation the chuck remains stuck, it is recommended to consult a Makita after-sales service center to avoid permanently damaging the chuck mechanism. Do not apply excessive force with the wrench, as this could deform the nut or break the internal jaws of the chuck.

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The Makita HP2071 percussion drill is equipped with a keyless chuck (with a ring and sleeve). During normal use, you should grasp the ring and turn the sleeve counterclockwise to open the jaws, then clockwise to tighten after inserting the drill bit.

If the chuck is stuck because a drill bit is jammed in the jaws and you cannot loosen it with the sleeve alone, the official Makita manual prescribes the following procedure:

Firmly grasp the handle of the chuck with a pair of pliers or a similar tool. Important: do not grasp by the fixing ring, only by the cylindrical handle.
Place an appropriate wrench (19mm wrench, adjustable wrench, or equivalent) on the hex nut located at the front of the chuck (visible under the chuck).
Turn the wrench clockwise to gradually loosen the stuck chuck.

This procedure uses the leverage effect of the wrench on the hex nut to create sufficient loosening force. The wrench should be proportionate to the diameter of the hex nut for safety and efficiency.

If after this operation the chuck remains stuck, it is recommended to consult a Makita after-sales service center to avoid permanently damaging the chuck mechanism. Do not apply excessive force with the wrench, as this could deform the nut or break the internal jaws of the chuck.

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