- #1

YoshiMoshi

- 228

- 8

- TL;DR Summary
- Help with Whitworth and other systems of measurement for wrench sizing?

Hi I'm trying to understand how to convert Whitworth Wrench sizes to across the flats (AF) sizes.

I understand what Whitworth is, but I can't find any mathematical formula how to convert and perform the calculation yourself. When I look online, all I see are conversion tables, no formulas.

I mainly ask because I'm trying to figure out what 5/32 W is in AF size. None of the tables I find online show a conversion for 5/32 W. This led me to believe it was a size not allowed or specified, but when I search online I can find some old 5/32 W wrenches from like the 1930s and 1940s.

I was also wondering if there are other systems of measurement for wrenches? I know if the BA sizes like BA0, BA1 etc.

Whitworth, BA, Inch, mm, any other systems or standards of measurement?

I know there were other systems for pitch angle, but I'm mostly interested in wrench or spanner sizes.

I understand what Whitworth is, but I can't find any mathematical formula how to convert and perform the calculation yourself. When I look online, all I see are conversion tables, no formulas.

I mainly ask because I'm trying to figure out what 5/32 W is in AF size. None of the tables I find online show a conversion for 5/32 W. This led me to believe it was a size not allowed or specified, but when I search online I can find some old 5/32 W wrenches from like the 1930s and 1940s.

I was also wondering if there are other systems of measurement for wrenches? I know if the BA sizes like BA0, BA1 etc.

Whitworth, BA, Inch, mm, any other systems or standards of measurement?

I know there were other systems for pitch angle, but I'm mostly interested in wrench or spanner sizes.