Drilled Disc Hole Sizes

[Leslie]

Willis, post a photo please

 

[willis]

 

[5twins]

Leslie, I'm not sure exactly where you're measuring for your I.D.? Anyway, using the silver part of the disc, O.D. is 298mm, I.D. about 208mm .....

 

[Leslie]

Leslie, I'm not sure exactly where you're measuring for your I.D.? Anyway, using the silver part of the disc, O.D. is 298mm, I.D. about 208mm .....

View attachment 213322

Twins, that is it I would consider that to be the contact/friction surface on a disc, thank you for that.

 

[Rasputin]

Fascinating. Wasn't there a beatles song about this?

In Blackburn Lancashire, I believe.

 

[gggGary]

Here you go @5twins arrived at the shed of ill repute last week ;^) Note those nice thick chamfers.

 

[Leslie]

Lads, an updated version on Jpg fyi

 

[mrtwowheel]

Here you go @5twins arrived at the shed of ill repute last week ;^) Note those nice thick chamfers.
View attachment 213350

Trolling around here, thinking about a pattern for my CB750C with dual discs. I like this pattern for it, but that pattern would only work with those huge holes.