How to remove coventry easychange chuck/toolholder

[Rabs]

Just to say I finally worked this out. The adapter has a threaded bolt at the back of the taper, so if you remove the tool and then reach up inside the chuck with an allen key you can unscrew it and get it off.

[uli12us]

I've received my new macine with the same coventry system. There is a brass button and if i press these, i can turn the ring some 1/4 revolution, but nothing further happens. What must i do, to remove the Toolholder inserts.

[magicniner]

Because the tool holders are on a taper they can be a little sticky, it's not always easy but turn the ring to it's limit of travel and bump the holder, I just bump with my palm and the holder will usually release.

- Nick

[uli12us]

Thanks I'll try it tomorrow.

[uli12us]

Ok, thanks, it works. I have removed it with a small rubber hammer.
It was a bit rusty.

The System isn't really bad, only very expensive. If I see it right, its 4 times the price of a BT30 toolholder. If one have a lathe, then he can turn the taper to 10° from a BT30, who have the same max Diametre. After that, it needs the recess for the clampballs.