G’day All,
22mm is near as dammit to 7/8” - which is what they are.
The larger HP HD’s were 1” (thanks to Nath for that bit of very useful information) and some of the anniversaries and beyond were 1” (?).
Perhaps a 1” shaft would have prevented the kind of failure that you experienced, dontknowitall. That said, it did last something in the order of 30 years so I guess we have little right to complain.
Cheers,
