Originally Posted by Pikey Dave
What type of bearings are they? Taper roller or sealed waterproof ball?
They are taper roller bearings.
Hereís a link to the nut im talking about
A bit more googling has shown this sort of but was once common on car wheel bearings. Itís apparently a stake nut and you use an air chisel to push the collar in to the split axle, I havenít got one of them so screwdriver and lump hammer it is for me!!!!
Thanks for all the replies.