Question about Bosch 11236VS Rotary Hammer

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Chuck came off of drill on a Bosch 11236VS hammer drill

It looks like it should just snap back on with 2 ballbearings in two slots and 2 ballbearings in two indentations. It will not go back on. Any advise on how to reinstall?

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Have you pulled the collar to release the pressure on the steel balls. Just pull the collar usually forward and slide on the shaft and then release and twist till it locks. Let me know if I can help further

Posted on Jan 09, 2009

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You twist the collar to get it to seat back on the drill. Pull to put bit in, twist to put chuck on.

Posted on Feb 01, 2013

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I have a dewalt d25303 rotary hammer drill works but drilling in surfaces stops motor is runing

It could be a couple things:
1) you have a bad clutch #112 on the diagram
2) you have stripped out the armature gear (you would hear grinding if this was the problem)

Using a screwdriver, pry off the rubber cap on the end of the nose and then slide the collar off.
Again using a screwdriver remove the snap ring at the end of the nose and disassemble the bit lock.
Next using a small screwdriver, pry off the cover on the selector knob & remove the screw underneath - remove the selector knob.
Finally, remove the 4 screws holding the gearcase to the motor and slide the gearcase cover straight off.
You should now be able to see the condition of the gears - if they do not appear to be stripped your problem will be the clutch gear.
Note: when reassembling, be sure to line up the selector knob pin with the carrier inside. Detail

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1 Answer

Can not remove bit from 11223 EVS bosch rotohammer

Hopefully you don't have the wrong shank jammed in this because it can be a costly repair.
- Using a screwdriver, pull off the rubber dust cap #21 at the end of the nose & slide it out of your way.
- The shell #22 will also slide up out of your way
- Using a pick or small screwdriver, remove the snap ring #143 at the end of the nose & slide the 2 metal #144 & 1 rubber washer #31 out of your way
Slide the spacer tube #24 & stop sleeve #25 out of your way
Now you can access the 2 pawls #26 that hold the bit in place - you will have to assess what is jammed from here .
As I said, if you have a spline bit jammed in this SDS nose you may be looking at a whole new barrel because even if you extract the bit most of the time is does damage to the bit sleeve in the barrel.


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1 Answer

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Not all bits for hammer drills are the same as the slots in the sides of the shanks are different between makes . There is a standard between hilti and ramset drill bits but other makers have different ideas Check out the shanks of your drill bits and look for the slot that holds in the bit.

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Try a generic brand at a hardware shop. Make sure that the slots in the shank are the same as the original or they will not stay locked in the holder.

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I have a Metabo KHE-D24 with a SDS plus key less chuck, how do you remove this style of chuck?

Look at the drive shaft under the base of the chuck and look for flats on the shaft or a nut. Hold this and use a pair of multi grips on the chuck to unscrew it from the shaft. Or place a bolt in the jaws if they still work and place the bolt in a vice and undo the shaft off the chuck

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1 Answer

How do we get the chuck to stay on, has 4 ball bearings and slots but won"t stay in place.

You twist the chuck counter clock wise while pushing down on it. It will not go on if you rotate it clockwise. Must be COUNTER CLOCKWISE. If this doesn't work then the bit sleeve in the chuck is worn too much and needs repalced. You remove the chuck by rotating counter clockwise and pulling up on it.

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what you are missing is a dewalt hammer drill.

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SDS (or Slotted Drive System) bits for hammer drills/rotary hammers allow the bit to slide in the chuck and enhance the hammering action of the tool. For most applications, these bits provide plenty of torque. SDS Max bits are similar to SDS bits, but have larger shanks and come in larger sizes than SDS bits. These powerful bits are useful in industrial applications.

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