How do I calculate the force a Metric thread can withstand 1

[Nkelly85]

Hi
I am building a hydraulic press and I'm using a RAM from an old excavator. It has a diameter of 177mm which I have formed a 1mm pitch thread at the end for 50mm of thread. I intend to thread this into a large collar at the top of the press. can anyone tell me how many metric tones of force this thread can withstand or can anyone advise me on a more suitable thread pitch for maximum strength .

 

[unclesyd]

You need to checkout the paper linked below.

http://www.hexagon.de/dose/dose-1e.pdf

 

[juergenwt]

Nkelly85 - For Hydraulic Presses you should use a 45 deg. Buttress Thread. Spec's under DIN 2781.