I'm searching to understand the differences between those systems, for sure we use metric but I still have not so clear what do You use in England, what in Usa or Australia.
I refer to threading system. Which is the difference between imperial and whitworth?
I know in metric we call a M4 a screw with nominal diameter 4mm and pitch 0,7mm (big pitch, most used) or we call a M4x0.5 a fine pitch screw with a nominal diameter of 4mm and a pitch of 0,5mm.
Now I read on wikipedia that, in USA, is used a system with couple of number, such 4-40, 6-32,... that belong to a logaritmic scale. So, if I have to convert a 6-32 screw in imperial i need to use the formula: dia = (#N x .013") + .060" and, after about 5 minutes, I know a 6-32 it's about a 3,5mm nom.diam. with 32 pitch per inch. Is this system called the imperial or whitworth?
Boh... I have a really big confusion in my head. I hope someone here could explain to me where is the secret, and what You usually use on your plan!
All the best, and a good sunday to everyone,
Paolo
I refer to threading system. Which is the difference between imperial and whitworth?
I know in metric we call a M4 a screw with nominal diameter 4mm and pitch 0,7mm (big pitch, most used) or we call a M4x0.5 a fine pitch screw with a nominal diameter of 4mm and a pitch of 0,5mm.
Now I read on wikipedia that, in USA, is used a system with couple of number, such 4-40, 6-32,... that belong to a logaritmic scale. So, if I have to convert a 6-32 screw in imperial i need to use the formula: dia = (#N x .013") + .060" and, after about 5 minutes, I know a 6-32 it's about a 3,5mm nom.diam. with 32 pitch per inch. Is this system called the imperial or whitworth?
Boh... I have a really big confusion in my head. I hope someone here could explain to me where is the secret, and what You usually use on your plan!
All the best, and a good sunday to everyone,
Paolo