crankshaft thread size

[Myford]

Hi,
can anybody tell me the thread type that holds the rotor on to the end of the crankshaft, is it 5/8 UNF ?
Terry

 

[L.A.B.]

5/8" UNF is 18 TPI.
The Commando rotor nut/crank thread is 20 TPI I believe, possibly 5/8 - 20 TPI BSCycle thread (as most diameters of Cycle thread were 26 TPI).

 

[Myford]

Thanks for that.
Terry

 

[marinatlas]

Hi there, yes I can confirm , it is 5/8 20 tpi, had just bought the dye from rdgtools.co.uk three days ago , fast sending and cheap ..................

 

[Myford]

hopefully its just the nut has been crushed a bit, I've bought a new one. but if its not I was just wondering where I would get a 20 TPI die from, so now I know,
thanks
Terry