I will be posting a brief article here on NHT crank bearing and had been planing to do so for a few weeks since doing some crank work and research here in the shop.
This knowledge may help you in the future, but mainly may help to put in perspective the SEVERE limitations of sourcing your help(not) from unknowns on internet forums. See here:
www.accessnorton.com/nj306e-6203-t26211.html#p346845
You will note the number of respondents to the original posters topic. When all is said and done, 13+ posts and no one notices the bearing in question totally eludes them all as being a 17mm bearing that WON'T fit onto a 30MM shaft. AND they can't even stay on topic.