Thread forms used in Villiers engines

[gashat]

I have a Villiers 34A that I am taking apart and would like to know what thread is used on this engine? Thanks. Gene

[Phil Hyde]

Villiers threads

Gene

BSF & BSW. I think they also created a few specials. The underlying threadform was BSW, 55 degree angle.

Hope this helps

Phil

[riflegreen]

Don't forget 26TPI cycle on the stud ends , Whitworth into the alloy and cycle the other end .

Chris