Bicycle taps & dies

[PAUL161]

Is a 1/4" 26 tpi tap the same as a 1/4 BSF tap? PJ

 

[Gliderman8]

Is a 1/4" 26 tpi tap the same as a 1/4 BSF tap? PJ

I may be wrong, but I think the pitch of the threads are different from imperial to BSF.

 

[John Turney]

Is a 1/4" 26 tpi tap the same as a 1/4 BSF tap? PJ

Sure it's not metric?

 

[BobHaskell]

Is a 1/4" 26 tpi tap the same as a 1/4 BSF tap? PJ

1/4 BSF is 26 TPI. But to be BSF, the thread angle has to be 55 degrees instead of 60.

 

[70herald]

Is a 1/4" 26 tpi tap the same as a 1/4 BSF tap? PJ

OK Paul - -- where do you have a 1/4" tap on a bike? Restoring an old Raleigh?
You know the rules -- no esoteric questions like this without some information

 

[PAUL161]

Thanks guys you answered my question. 55 degrees verses 60. I have some old 26 tpi taps but only a couple of bsf taps and was wondering if the pitch was the same. I need a 1/4" bsf tap which I'll have to purchase. PJ

 

[PAUL161]

Hmmm, British Tools & Fasteners are claiming their BSF taps are 26 tpi. A couple other distributors are claiming the same thing, BSF=26tpi! Confusing for sure. As of yet, no comparison of degree angle, 55 or 60 degrees. Doesn't make sense that a std BSF tap would more than one degree angle.

 

[PAUL161]

Just placed an order from Tracy Tools in the UK. Stuff I bought from them before was of a high quality and easy to deal with! PJ