Question about Makita 6408K 3/8" Variable Speed, Reversible Drill with Case

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Makita 6408 drill motor. can't see how to replace the chuck.

I need to replace the chuck on my makita drill motor but can't see how to remove it. there doesn't appear to be a set screw on it and the shaft is straight splined. i have purchased a replacement part but it is threaded.

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If you have the 6408 as listed the spindle is threaded and you are correct there is no retaining screw. What you would need to do is find a bent handle allen wrench about the size of the chuck capacity 3/8" and insert the shorter end in the chuck and tighten. put the chuck on a block of wood or workbench and position the long end at about a 30 degree angle in the counter clockwise position and strike it with a hammer, this might take a couple hits. If this is not a 6408 let me know and I will look at the tool for you and see what you got.

Posted on Jan 23, 2009

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Some makita drills have a wrong way screw in inside the chuck. turn your screw driver like you would normally tighten a screw. when that is removed the chuck will unscrew from the spindle. use the large allen wrench and hit it hard to loosen the chuck. when i put the new chuck on i would put neversieze on the screw and the spindle. they will rust together and then you have to cut them off.

Posted on Aug 29, 2010

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Check out the user reviews of this item on Amazon. One of them says he unscrewed the chuck.

Posted on Mar 11, 2009

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