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How do I replace the keyless chuck in a Bosch CSB 550 RE?

My keyless chuck has jammed and it seems that the thread might have stripped. Is it a big deal to replace it myself, and how would I do it? Thanks.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 4102 Answers

SOURCE: Never have used a keyless chuck b4- need to change bit, how do I do this? thanks

hi this should be reletively easy hold the end black bit with the sivler bit holde coming out not the black bit next to the yellow case on drill you hold the black part thats at end of drill by where the bit goes into not the black bit near the trigger hope i explain this ok.
Hold this bit tight then put drill in reverse then press trigger a couple of times it might be tight but shouldnt be that tight it wont undo.
1 put in reverse
2 hold black plastic piece near where drill bit goes into
3 press trigger few times
4 this should undo it allowing you to put a bit in
make sure its in reverse else you will just tighten it up more let me know if you need further assistance ok

Posted on Mar 05, 2008

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rowdy45176
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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

  • 583 Answers

SOURCE: Cordless Drill, Keyless Chuck stuck in full open position.

if chuck is wide open ,look down inside there should be an allen screw or bolt at the bottom of the chuck it should undo anti clocwise and the chuck comes off

Posted on Aug 18, 2009

SRF518
  • 232 Answers

SOURCE: replacing carbon brushes of csb 500 re bosch drill

bosch brushes are unique. they have a spring embedded in the carbon so when the length gets too short, the spring lets go and raises the brush above the commutator and the appliance stops. you need to remove the handle partially or the brush covers and unscrew the brush holder(s) two small screws secure the brushes and holder to the appliance.

Posted on Oct 13, 2009

brewerstool
  • 141 Answers

SOURCE: relace keyless chuck

It really depends on the model. Here is a general description of how to remove most regular keyed and keyless chucks from corded and cordless drills:
Some chucks have a Left Handed screw that secures them to the spindle so they do not come loose. You can look into the chuck with a flashlight and see if there is a chuck screw. (It may be a torx head, flat head, or philips head) You will need to remove this screw first before doing anything else. Sometimes there is loc-tite applied to the screw so it may be stubborn and sometimes you will strip the screw head. Remeber that the old saying lefty-loosey, righty-tighty does not apply here. Left is actually tightening a left hand thread, so you want to turn it right to loosen. I know, it will feel weird but thats the way to loosen it. You may have to apply some heat to the screw in order to get that loc-tite to break. A pencil torch works great. If you strip the head out you will have to use a drill press and drill the screw head off.
After removing the screw you can remove the chuck.
To remove the chuck, the easiest way is to use a hex socket bit and an impact wrench. Put the hex bit in the chuck, and depending on the condition of the jaws, tighten the jaws as much as possible to the hex bit. Put the impact in reverse and bump it until the chuck is loosened. If you do not have access to an impact wrench you will need to put a hex key with a long arm into the chuck and tighten it then place the drill on the edge of your bench and give it a good whack with a 3lb hammer. It may not come off immediately so you may have to reset and do this a couple of times. Not the most effective way to remove a chuck, especially if one of the jaws is missing, but that is what most manufacturers tell you to do. I myself cut the collar off with a die grinder and then use a pipe wrench on the body of the chuck applying constant pressure while heating the chuck body with a torch. Works every time. Heat is our friend on stubborn chucks. Good luck, any questions please post.

Posted on Oct 22, 2009

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1 Answer

How to remove keyless chuck


open the chuck jaws right up
down the center of the chuck you will see either a philips screw head or a hex head for allen key
hold the shaft at the base of the chuck to stop it from turning and undo the screw in the chuck in a right hand direction ( it is a left hand thread) when you have that out , still holding the shaft turn the chuck in the left hand direction ( normal thread ) and screw the chuck off
to assist in undoing the chuck do it up so that the jaws come out a bit
place something between the 3 jaws to act as a lever or use an allen key in the chuck done it tight and use that as a lever to undo the chuck
the secret is the lh thread screw in side the chuck which stops it from undoing when the drill is in reverse

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You have wound the threaded section of the jaws fast the thread in the case so sorry the chuck is broken as the teeth will be damaged. Best replace it with a new chuck

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Can't help with this other than suggest that you do not proceed, Keyless chucks can be problematic particularly if dust /debris from material being drilled finds its way into the chuck..

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It is a spring loaded hammer drill. You need to push the chuck down just a bit for it to engage the clutch. If it is still slipping then either the clutch pieces (items 23 and 32) are worn or item 32 is spinning freely on the spindle shaft. Here is a parts diagram.

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Open the chuck wide open. In the center is a retaining screw, they usually have left hand threads. Remove the screw. Take an allen wrench1/4" to 3/8" in size and fasten the short side tightly in the chuck. The chucks are usually right hand thread, so take a small hammer and strike the allen wrench to turn the chuck to the left to loosen it. Once you have the chuck off, verify the thread size of the drill motor shaft, then go to McMaster-Carr and choose the one you need.

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If there is a chuck bolt in the center (where the bit goes) remove it (left hand thread). The chuck is threaded onto the splindle(right hand thread). On some of those drills they have a small hole in the housing that lines up with a hole in the spindle. Put a pin punch in to lock the shaft so you can unthread the chuck. If you clamp a 3/8" allen wrench in the chuck it acts as a good handle. If there are no holes to lock the chuck, if you lay the drill on a bench and give the allen wrench a sharp blow with a rubber mallet it will unthread the chuck. If the chuck is damaged and will not hold an allen key you will have to cut the spindle off and replace the chuck and spindle.

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1 Answer

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These chuck screws are tight. Hammer clockwise until screw brakes loose.Open chuck completely and remove screw.Chuck is threaded to spindle shaft . Place allen wrench with long end facing out of tool in chuck and tighten chuck securely. With hammer tap allen wrench sharply counter clockwise ( normal thread.)

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You need an adaptor which would attach to the motor shaft (with a set screw) and provide threads onto which you can screw the chuck. I have never bought one of these, but possibly an internet search would yield a scource for such an adaptor.

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