20-10-2018, 07:12 AM
Tony the spindle is mild steel and unhardened with no oil scroll, I did not remove a bush as I wished to run the unit as it was delivered, therefore I can not be certain if cast iron or steel however they appear to be the latter and the surface finish of the bore is rather poor. It would be educational to strip one of these after 5000 miles and see how it is bearing up.
Black Art Enthusiast