Question about Dewalt DW999K 7/8" Cordless SDS Rotary Hammer

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How do I remove the screw holding the keyless chuck. Dewalt cordless 18v hammerdrill, I know it's reverse thread but it still will not come out. Is there a locking mechanism?

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Sometimes I have had to use an impact tool to shock the screw loose, what you might try is to tighten the chuck more and then remove. there is no locking mechanism that I know about. also I would recommend going to Dewaltservicenet.com and downloading a manual/breakdown for this before starting.

Posted on May 08, 2010

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1 Answer

How to remove chuck


Check first to see if there is a screw or allen head bolt deep down in the centre of the chuck, securing it against loosening due to vibration. The trouble is the head of such a screw often gets damaged, making it difficult to remove.

Then the chuck itself will be screwed onto the spindle with a RH thread, so it tightens in normal use. It may be very tight, so insert a tight fitting steel stub into the chuck key hole, and hit it sharply.

If it is a keyless chuck, there should be a slot there somewhere to fit a piece of metal into so you can hit it. Use a piece of soft steel or copper if you have it.

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1 Answer

I have a dc 759 it has a plastic cover over the keyless chuck ....it is stripped out.....can i just replace the plastic cover? .... if so how and where can i get one


If the drill is not too old, I would take it to your nearest factory dewalt repair shop. they have a good warranty on their items. If it is older you probably need to replace the chuck itself. You need to remove the plastic to get the chuck open and then there is a screw down inside the chuck that needs removed. The chuck should come right off and just reverse the process to install the new one.

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1 Answer

How to remove the chuck from a dewalt cordless hammer drill?


Remove the REVERSE-THREAD screw at the bottom of the chuck. Set the clutch collar to the highest setting, and set the gear to the slowest setting on the transmission. Remove the power source! Get the biggest allen wrench you can fit in the end of the chuck(the shortest leg) and tighten the chuck down around it, allowing the jaws to rest and tighten on the flats of the wrench. Lay the drill on its side(chuck toward you, handle to the left, and allen wrench to the left, horizontal to the deck. Then with a hammer(soft hammer if you care about the allen wrench) quickly and deliberately hit the allen wrench in an attempt to cause the allen wrench to spin counter clockwise. Let me know if this works for you!

Sep 19, 2010 | Dewalt DC925B Heavy Duty Xrp 18V Cordless...

1 Answer

How to--- chuck removal DC925 drill DeWalt


Open the chuck fully. Inside the center bottom of the chuck you will normally find a reverse threaded lock screw that you must first remove. If it is hard to loosen, you may need to heat it with a micro torch or a heat gun to make the thread lock compound slip. Then fasten the smaller end of an allen key firmly into the jaws of the chuck. Engage the low gear. Then hit the longer end rapidly with a hammer to unscrew the chuck by rotating it anti clockwise.

Sep 05, 2010 | Dewalt DC925B Heavy Duty Xrp 18V Cordless...

1 Answer

Is it a torx or allen head screw that holds the keyless chuck on a Dewalt Cordless Drill model # dw959. If it is a torx, what size is it ? Is it a right or left handed thread ?


don't know the sizes for the screw but it is the wrong way threads. when you get that out you need a very large allen wrench in the chuck and tight. lay the drill body on a work bench and hit the allen wrench hard to break it loose. it unscres normally.

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1 Answer

Dewalt chuck removal


there is a screw inside the chuck inline with it, I believe it has a reverse thread so turn it counter clockwise to remove

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1 Answer

Remove c keyless chuck from 18v dewalt drill


There is no loctite on the chuck threads, only blue loctite on the reverse screw. This is how I remove chucks.

Remove the REVERSE-THREAD screw at the bottom of the chuck. Set the clutch collar to the highest setting, and set the gear to the slowest setting on the transmission. Remove the power source! Get the biggest allen wrench you can fit in the end of the chuck(the shortest leg) and tighten the chuck down around it, allowing the jaws to rest and tighten on the flats of the wrench. Lay the drill on its side(chuck toward you, handle to the left, and allen wrench to the left, horizontal to the deck). Then with a hammer(soft hammer if you care about the allen wrench) quickly and deliberately hit the allen wrench in an attempt to cause the allen wrench to spin counter clockwise. Let me know if this works for you!

Jun 15, 2010 | Dewalt 18v Battery Hammer Drill Dcd950...

1 Answer

Remove existing phillips no chuck avalible in this model


Take a phillips screw driver and stick it into one of the key holes. Then take a flat head screwdriver and stick in one of the slots. And prise against the phillips.

Or you can wrap a belt or strap around the chuck hold it tight, then put the drill in reverse and unscrew it.

May 30, 2010 | Dewalt DC925B Heavy Duty Xrp 18V Cordless...

2 Answers

How do i remove the chuck from dewalt dc925 cordless drill, dosnt have a screw inside the chuck, read somewhere that i need a special tool but no instruction or picture of the tool. please help., thank you


The dc925 and the current model dcd950 along with several other models of Dewalt 's line of cordless hammer drills DO NOT have a screw inside removal requires a CHUCK REMOVAL FIXTURE part #
233804-40 also you can't use a generic replacement chuck. As of 2/2/2010 the prices on the Dewaltservicenet web site are $72.74 for
the tool and $69.70 for the chuck, part # 330075-90.

Oct 17, 2009 | Dewalt Heavy Duty Xrp 1/2" 18V Cordless...

1 Answer

Keyless chuck


You will find a screw inside the chuck that needs to come out first of all but beware that it will be a reverse thread. This is to stop it loosening whilst in use. then you will need to unscrew the chuck but it isn't easy as you have to hold the shaft that the chuck is attatched to. You can sometimes take the chuck off by holding it and pulling the trigger while in reverse. (but they can be stuck fast).

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