In article , GMC writes

Ta for the advice, I already have it but it gets used very infrequently
so should hopefully last me a while!

Try looking on the existing blade, the one on my 250mm version of the
same machine has the following, 250 x 2.8 dia 30 - 24T so has a 30mm
bore.
--
fred
BBC3, ITV2/3/4, channels going to the DOGs