How to release a bit from a jammed keyless drill chuck

drillstucktools

I have a Bosch PSB 650 RE hammer drill, with a keyless chuck:

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The chuck mechanism involves a button on top which, when pressed, allows the chuck to be tightened or released, rather than just rotating with the bit.

The other day I did some drilling with an 8mm masonry bit (in hammer mode); and after drilling – the chuck would not get release. I applied as much torque as my hand could stand, until it was quite sore from the friction against the plastic.

My question: How do I release the bit from the drill?

I'm hesitant to try pliers or a vise grip, worried I might just file down the plastic and make a bad situation worse.

Notes:

  • The chuck was not overtightened – just the usual tightness. So this related question is not quite my situation.
  • I'd rather save the drill bit than break it; and would also not want to damage the chuck jaws.

Best Answer

I recently had the same issue and tried numerous solutions with no luck. In the end I purchased a strap wrench: This kind of wrench grips the object via a strap or a chain:

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You basically put the strap around the chuck, tighten the strap and then use the wrench handle as a lever to gain more torque while trying to undo chuck. This worked extremely well.

I simply wouldn't bother with any other solution in the future.

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