Single Ball Bearing to fit all Norton upgright and pre-AMC laydown gearbox drive side layshaft - high quality manufacturer.
This bearing is for the drive side gearbox layshaft bearing and comes from a high quality manufaturer (nearly always SKF, but occasionally RHP - both top quality bearing suppliers).
You may find if you are stripping your original gearbox it is fitted with a roller bearing, rather than a ball bearing - I have seen both fitted over the years. I personally normally fit a ball bearing (I find the shimming process is slightly easier) - but if you do wish to fit a roller bearing email us and we may be able to supply that also - sales@racingvincent.co.uk