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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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    I suspect this is a design problem allowing interference from vibration. I have two types of keyless chuck: one lockable, the other not. As you can guess, the non-lockable one vibrates loose whereas the lockable one does not. However, there's a problem in that while the non-lockable one is as yours is, part of the drill (a 12v Bosch), the lockable one is a separate chuck that can replace a drills existing key type chuck, typically associated with 110/230v drills. So, until they design lockable built in chuck's, we're stuck with the problem.


    F
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  • 0
    I suspect this is a design problem allowing interference from vibration. I have two types of keyless chuck: one lockable, the other not. As you can guess, the non-lockable one vibrates loose whereas the lockable one does not. However, there's a problem in that while the non-lockable one is as yours is, part of the drill (a 12v Bosch), the lockable one is a separate chuck that can replace a drills existing key type chuck, typically associated with 110/230v drills. So, until they design lockable built in chuck's, we're stuck with the problem.


    F
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