Thread: Chuck removal

Is it a taper or threaded if tapered is a wedge shape and hammer it between the body and back of the chuck.

Can you get a drift pin in there and give the end of the spindle a couple of sharp whacks too try and pop the thread to break the seal.

"Is it a taper or threaded if tapered is a wedge shape and hammer it between the body and back of the chuck."

Can't really tell but the exploded diagram [yes, I do have the manual - not much help in a number of different languages] appears to give the idea of a thread.

"Can you get a drift pin in there and give the end of the spindle a couple of sharp whacks too try and pop the thread to break the seal."

Will try this in the morning but from memory looking down the hole the only part of the spindle [I think] is at the base of the screw hole but will give it a go.

Thank you both for the suggestions.

Bob

The chucks are normally threaded on and held with a reverse-thread screw (which you said you already removed). My BEAT Metabos have nuts which you can hold with a thin spanner. Even then you sometimes have to twist like hell to get them off. Years of use tends to freeze 'em on pretty good...

• You can try holding the chuck with an allen key and a vice then hitting the reverse in 1st gear
• Or, if your Bosch doesn't have a nut on the drive shaft, I would suggest opening the case and stalling the gearbox.

Let us know how you get on.

Damien

Had another go - no joy.

Looking down the screw hole with a bore light I can see blue goo [now quite hard] which was around the thread - I can only presume that this is some sort of "Lok Tite" and that it has also been used on the thread which holds the chuck onto the shaft. Don't really understand as to why this would be necessary but................

Damien, had another close look at the exploded diagram and the chuck is threaded - tried the allen key trick as well as a larger piece of bent rod and hitting reverse in drill mode as well as letting the clutch chatter [and forward, just in case I could shock it loose] - no go. The Bosch has some form of shaft lock which allows one handed tightening - if trying to do it gently with a largish lever on the allen key [turning rather than hitting] you can override the lock and actually hear the gears inside turning - does not seem the right way to go.

I'm at a bit of a loss as to where to go with this one as I don't wish to destroy the drill to remove the chuck.

Thanks for your help so far.

Bob

Take it apart and stall the gearbox... Or grab onto the shaft somewhere practical to your purposes once you have removed the parts from the housing.

Here's a thread which describes pulling a battery drill down. Perhaps not completely relevant, but you can see that it's not too difficult...

Damien

Many thanks, I'll have to put it on the list.

As usual, lately, a simple job looks like becoming a deconstruct and reconstruct.

Bob

bob,ring bosch repair agent.

G'Day Bob,
In the online manual for my bosch drill it says:
Hope this helps.
Cheers ravlord.

&

Before any work on the machine itself, remove
the battery.

The locking screw

13 secures the drill chuck
against loosening from the drill spindle. Fully
open the drill chuck and completely unscrew the
locking screw 13 by turning in clockwise direction

Loosening the Drill Chuck

Place the machine on a stable surface (e. g.
workbench). Hold the machine firmly and loosen
the chuck by turning to the left, as when unscrewing
a screw ('). Loosen a tight chuck by giving
the long end of the Allen key 14 a sharp blow.

Tightening the Drill Chuck

The drill chuck is mounted in reverse order (

)).

Many thanks for your thoughts - had a look at Damien's disassembly and my exploded diagram again and it seems a hard way to go to do something which should be quite simple.

I will try to solve the problem in the easiest manner - thanks for your comments.

Regards,
Bob

I just had to replace the chuck on my makita... it took a pipe wrench to get the chuck off... destroying the plastics on old chuck at the same time not that it mattered

Dunno about your Bosch, the makita's have a flat on the shaft for a thin spanner