I hope this is an easy question to answer:

I need to change the MT2 adaptor in an all-steel keyless chuck to MT3. How do I remove the chuck from the B16 taper fitting adaptor?
There is a knurled ring around the chuck body with a grub screw. Loosening this screw might allow the ring to turn, but perhaps it needs a real heave? The MT2 adapter has no tang – it has an internal M10 thread, so not much to hang onto. There is no way a drift through the jaws will help, as the inside is steel right across.

I have taken several Jacobs and similar chucks apart, but this one has me beat.

Regards, Tim

Hello Jason

Yes, I thought of that, but with an MT2 adapter the difference in diameter between the two tapers seems hardly man enough. But I will give it a go … presuming that the ring with the grub screw does not need to be touched?

Cheers, Tim

Success – and relying on the presence of the drawbar thread (so this won't work with a tang);

Screw in the longest bit of M10 you can lay hands on, followed by a heavy steel ring (I used a 50mm flat-belt pulley) which will go over the full length of the taper. Add a nut, and hold the assembly hanging from the nut. Lift the ring and drop it smartly over the taper so it smacks hard against the back of the chuck. Oh, yes, and put something soft like a pair of old TT marshals overalls on the floor below, so the falling chuck and ring don't make too much of a clatter.

Thanks for the comments – next time will be easier using wedges as the new fitting is MT3.

Regards, Tim