[bphelps1727]

Hello,
I was wondering if anyone had a way to convert the (2x) 7° grooves in in the ID of this part to an equivalent threads per inch. We are looking to do these in a lathe and need threads per inch for programming. Thanks in advance.

[grg12]

Tangent of groove angle is equal to part circumference divided by one thread length. Therefore threads per inch will be tangent (7)/(pi×diameter) . But i don't guarantee it's correct. My reasoning - roll the part over piece of paper - groove will form a triangle with cirqumference height and one thread cycle length base

[grg12]

Sorry - i somehow misinterpreted the drawing. Thought its a long thin spindle not a ID of sleeve. In that case it should be tan(90-7)/(pi×diameter )