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Motorcycle Discussions => British Bikes => Topic started by: ramwing7 on January 07, 2025, 06:36:15 PM

Title: Sunbeam S7D stud
Post by: ramwing7 on January 07, 2025, 06:36:15 PM

Anyone know what size stud holds the rear Hardy-Spicer joint to the rear drive unit?
Thanks.

Title: Re: Sunbeam S7D stud
Post by: R on January 08, 2025, 09:52:33 AM

??
https://www.oldbikemag.com.au/wp-content/uploads/2023/01/OBA74-Sunbeam-5d.jpg

Title: Re: Sunbeam S7D stud
Post by: ramwing7 on January 08, 2025, 09:45:16 PM

In that pic, on the left side, you can see end of them at about the 1 and 7 positions.   There are 4 of them and they attach the Hardy Spicer to the flange coupling for the rear drive unit.

Title: Re: Sunbeam S7D stud
Post by: R on January 08, 2025, 10:57:12 PM

What do you have of them at present.
Wouldn't there be holes that would dictate their size ?

And wouldn't Stewart Engineering have what ye need.
Or have they ceased ...

Title: Re: Sunbeam S7D stud
Post by: Rex on January 09, 2025, 06:12:03 PM

From memory I would guess at 5/16 BSF or possibly BSCy, but it's been a while..
Do you not have any spare fasteners you could use to ascertain the size?

Title: Re: Sunbeam S7D stud
Post by: ramwing7 on January 11, 2025, 04:25:40 PM

Stewart engineering does still sell them for 9 pounds each.  Hoping for something more generic, but I bit the bullet bought one.