Question about Bosch Drills
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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Posted on Jan 02, 2017
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
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
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
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
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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