D1-3 Backplate Pins

[PeterBParticipant @peterb58166]

I was about to purchase a D1-3 backplate for my Denford Viceroy when I noticed that the Chinese (Chronos & RDG for instance) have apparently revised the pin size down by quite a lot! Why is this? Or am I mistaken? Would it still be safe to use?

 

It appears the industry standard pin dia is 0.5937″ (19/32″ or 15.05mm). But pin sizes are now quoted as 9/16″ (14.27mm) or even 14mm depending on where you look. Moreover, it appears there are imperial threaded variants and metric threaded variants out there. That’s the thing about “Standards” – there are so many variants to choose from!

 

Can anyone throw any light on this minefield please?

 

Peter,

[PeterBParticipant @peterb58166]

[JonParticipant @jon]

Just had a look for you but n a D1-4

An integral Pratt and Burnard is under by 6 thou.

Elliot is bang, so is my TOS and chinese RDG back plate if that helps.

 

It still dont stop the locking rings working to ‘O’ a common problem.

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