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Keyless Chuck Loosening Problem.

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I use a Hitachi DV 18DGL battery drill for a lot of my work. It is very good and the battery lasts a long time and charges up quickly when needed.


BUT, when in use the keyless chuck comes loose and the drill bit does not turn due to a poor hold. I have two of these drills and the same problem exists with both chucks. Is it a design problem or a bad batch of chucks? I do not know. Other makes of keyless chucks that I have used over the years hold the drill bits securely and do not come loose even if using a hammer action.


Is there a solution? Perhaps I should pour some fine sand into the chucks.


Z.
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    hertzal123:

    I have the same problem with the Makita,and have put it down to the sudden braking action if the trigger is released quickly.

    Have noticed if I let the motor slow down gradually,the chuck stays tight.

                                                                                              Regards,Hz




    Blinkin Ek! This is getting scientific and now includes physics. I should have listened more attentively during "science" lessons at school I think. Perhaps that Newton bloke is involved.


    Z.

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  • 0

    hertzal123:

    I have the same problem with the Makita,and have put it down to the sudden braking action if the trigger is released quickly.

    Have noticed if I let the motor slow down gradually,the chuck stays tight.

                                                                                              Regards,Hz




    Blinkin Ek! This is getting scientific and now includes physics. I should have listened more attentively during "science" lessons at school I think. Perhaps that Newton bloke is involved.


    Z.

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