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I have an old Bosch CSB420-E electric drill. I want to remove the key chuck. There is no screw in the chuck, so have no idea what to do. Grateful for any suggestions. Thanks

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You have to secure the armature or gear assembly that the chuck is attached to and rotate it counter clockwise to remove from the shaft. Warming it to 150 degrees F should make it slightly easier to turn.

Posted on Feb 18, 2012

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Posted on Jan 02, 2017

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stug_57u
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SOURCE: drill chuck removal

The screw should be left hand thread and the chuck is normal thread. The 'workshop' way to remove the chuck is to remove the screw (done). If the jaws are still working then clamp a sturdy allen key in it and whack it against a workbench to unscrew the chuck. If holding the drill in the normal position you would stand with the workbench to your left and whack it down on that. If the jaws aren't working then you can grip the body in a vice and use large pipe grips or stiltsons on the chuck. Also check to see if the chuck spindle will accept a thin spanner to hold it, as this is a slightly more caring way to brace the spindle. Then you can can hold the spanner in the vice and use the allen key in the chuck and unscrew it that way.

Posted on Oct 25, 2008

rowdy45176
  • 2176 Answers

SOURCE: chuck on Bosch 1194 vsr drill is rusted... how to remove?

you are half right. The screw that you see is a chuck retaining screw (LH thread) to keep the chuck from loosening up when in reverse. What you need to do is if you have one remove it first and then find a bent handle allen wrench about the size of the chuck capacity, lock the shorter end in the jaws and then position the wrench at about a 30 deg angle and put the chuck on a block of wood or bench and take a hammer and hit it counter clockwise. If you have a wrench small enough to lock onto the spindle use it and brace it on the bench. If this tool has a high and low setting use the low and if clutch equipped the drill only. Let me know if you need more help

Posted on Jun 27, 2009

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