vtstream
thanks for that, the drill is a bench top model and has limited space as it is between chuck and vice, so to turn up another adaptor would reduce this distance even more, thanks for the advice anyway.
John
I know I will have to buy a JT6 chuck and as you say there is very little difference between the two tapers but the thought of trying to hold the new chuck and polish out the difference while hanging onto the chuck at slow spindle speed (the thought of the chuck locking onto the taper and not letting go quick enough OUCH) thanks anyway.
I have a local grinding shop and have contacted them, for the price of a couple of beers he will re grind the JT21/2 to a JT6, apparently he comes across this quite a lot.
Thanks once again gentlemen for your help. John