Makita HR4002 Support Question

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Question posted by Anonymous-166285 on May 14th, 2020

Stuck Drill Bit

After using a 1/2 inch SDS MAX bit for about 1/2 hour the bit is totally stuck and I dont know how to remove it. Any help!

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Answer #1: Posted by INIMITABLE on May 15th, 2020 2:14 AM

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INIMITABLE

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hold the chuck and run the drill in reverse - I nearly burned my hand. Tried it with a thick gardening glove on, and still nearly burned my hand.
soak the head in WD40 to loosen the bit - nothing gained from this for me
hit the drill bit into the chuck as this helps release the jaws inwards - despite multiple bashes with a hammer nothing budged and the drill bit was no more loose than when I first started
use a strap wrench - the only way to do this was to grip around the chuck and run the drill in the opposite direction. As the drill bit was so stuck and the drill torque was so high it was the drill (rather than the chuck) that started to rotate and started moving towards drilling into my arm!

In the end I used two strap wrenches, one at the point the chuck should be turned and one just below. With the drill battery disconnected I was practically standing on the chuck to put enough force into the strap wrenches. There was so much force the chuck distorted into an oval (and this was a high quality drill), but eventually it popped and the drill bit came free.

Incidentally I oiled the chuck afterwards as it was very stiff (despite the previous oiling) which was probably a contributing factor to how stuck the drill bit was.

Hope this helps, and good luck!

I hope this is helpful? PLEASE "ACCEPT" and mark it "HELPFUL" to complement my little effort. Hope to bring you more detailed answers

-INIMITABLE

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