Question about Makita 18V LXT Lithium - Ion Cordless Impact Driver Kit Model BTD140

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Bit is stuck in btd142 driver - Makita 18V LXT Lithium - Ion Cordless Impact Driver Kit Model BTD140

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The makita impact drivers are picky about the bit that you use. if you use a single sided bit you have to make sure the distance between the channel and the end is 9mm (3/8) and if you're using a double sided bit you have to make sure the distance from tip to channel is 12mm (15/32)

try using a 1/4" wrench on the bit in reverse while pulling the collar back. if that doesnt work, tap the tip of the bit with a hammer with the collar pulled back

Posted on Nov 29, 2008

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SOURCE: bit stuck in quick release

My friend just had a problem where the shaft of a socket adapter broke off inside the the driver. Taking the spring assembly out didn't help as it was wedged so he used a screw/bolt extractor (ez out style thing). Drill a 5/32 hole in the broken piece, pound in the extractor and wiggle it back and forth to get it out. Beats buying a new chuck, or whatever that end piece is called on these drivers...

Posted on Jan 25, 2009

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I have a Hitachi WH 18 DFL cordless impact driver, which I love. I was doing a little bit of heavy drilling, and now the drill bit is stuck. The sleeve extends as if to release the bit, but the bit do


My guess is that the bit twisted a little in the bit holder so the steel ball is bound. If the collar moves you could try a slide puller on the bit and see if you can impact it out with the slide puller. Or you could take the bit holder apart. There is a retaining ring that holds it all together right on top. Pull that off and a washer, spring and the collar will come off. Becarefull to watch for the steel balls on the spindle. They WILL fall out! Now hopefully the bit will come out. If not it may need to be twisted in the oposite direction that it got stuck when you were using it to break it free. Hope that helps and good luck!

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Go to the Makita home page, http://www.makitatools.com/en-us/Modules/Home/Default.aspx, and put your model number in the search box to find their page on your tool. On the left side of the page will be the parts breakdown and owner's manual for view or download if they are still available.

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Someone stuck a conventional driver bit into the impact driver and it is stuck tight.


VERY GENTLY. . . . use a flat tip screw driver to try to push the collar forward so that it will release the bit. You may need to gently hold the handle of the impacter in a table vice or something like that to steady the tool, then push forward on the collar with a screwdriver and use a pair of pliers to pull outward on the bit at the same time.

Or instead of a screwdriver try vicegrips that are adjusted loose enough to just lock but not squeeze when closed. Pliers that grip too tightly may bend the collar and keep it from being able to slide forward to release bits.

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These units have only been out for a short while and most are on warranty. Take it to a Bosch Service center in your area and they will replace the front of the unit. Unfortunatly this is a problem with this type of unit. The bit will deform slightly from the impacting action and lock itself in the chuck.

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Bit stuck in quick release chuck - makita btd142


What has happened is the hex part of the bit has twisted slightly making it hard to remove. What I would do if you are comfortable with partial disassembly is remove the quick release mechanish. There is a split ring that comes off first and then a washer and spring, next remove the outer collar and SMALL steel ball from side of chuck. I take a pick (dental tool) and push up or try and twist the stuck bit. Sometimes it takes while but usually this works. Let me know if I can try and help further.

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