1 1/4-4 Acme thread - left and right hand

[Smit]

I have to program a shaft for external 1 1/4-4 acme thread and there is no 1 1/4-4 acme thread in the thread tables. There is a 1 1/4-5 acme. It's not even in my machinist handbook.

 

Does anybody know where to find the data for that thread? I guess what all I really need is the minor diameter.

 

I have never programmed an acme thread before, I don't see why it would be much different than a regular thread.

 

TIa for any info.

[Guest MTB Technical Services]

http://americanmachinist.com/thread-cutting-values-calculator

[Del.]

I have to program a shaft for external 1 1/4-4 acme thread and there is no 1 1/4-4 acme thread in the thread tables. There is a 1 1/4-5 acme. It's not even in my machinist handbook.

 

Does anybody know where to find the data for that thread? I guess what all I really need is the minor diameter.

 

I have never programmed an acme thread before, I don't see why it would be much different than a regular thread.

 

TIa for any info.

 

 

I get this Minor dia. .980

pitch dia1.125

thread angle 29

pitch.250

single depth .135

max depth .48334

wire size .12911

measurement over wires 1.28642

helix angle 4.04611

[Smit]

Thanks gents, that should do it!

[EX-wccprogrammer]

Here is what my software puts out.

 

1.25-4_ACME.pdf