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threaded hole question

threaded hole question

threaded hole question

(OP)
I need to make a threaded hole through the length of a cylinder

Cylinder diameter 50mm
Cylinder length 40mm
Threaded hole 1.250-18 (through all)
Am I correct that 1.250 is the diameter , and that  18 is the pitch ?
I have never worked with inch before, so how do I select this  1.250-18 thread ?
The hole wizard?
Thanks,

Toolmaker

RE: threaded hole question

(OP)
Tanks ctopher,

But how can i obtain  1.250-18 UNEF thread specification, needed for setting the hole wizard settings?

 

Toolmaker

RE: threaded hole question

(OP)
found on the internet    

    
    size:                      1 1/4
    major dia:              1.250
    tpi:                        18
    pitch dia:                1.2139
    minor dia external(a):   1.1839
    minor dia internal(b):   1.1899                           

Toolmaker

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