M30x2 Thread Tensile Loading

[Jim Cliff]

Hi,

I'm machining threads on to the ends of chrome rod for use in hydraulic rams.
I have a ram which will see a maximum retracting load of 10 ton (98.1kN). For this I'm considering a thread of M30x2mm pitch. The chrome rod we use has a tensile strength of 550 n/mm2 with a yielding of 420 n/mm2.

What is the best way to calculate max loading in newtons that the thread can be subjected to before snapping?

Thanks

 

[klaus.]

you could use formulas given in the codes

 

[Jim Cliff]

Where can I get a copy of these codes?
Is there literature readily available that contain standard calculations for engineers for this calculation?

 

[klaus.]

well usually codes you have to buy...
you might find copy using google
lots of free literature on that subject ....depending what part of the world you are

 

[racookpe1978]

Your Mechanical Engineer's Handbook not available?
Got to invest in something!

 

[ornerynorsk]

There are a boatload of online calculators easily accessible by a simple google search.

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

 

[CWB1]

Typically I design to ~80% of yield for threads that will need to be reused often in the future, 90%+ for threads on parts like cylinders that rarely need to be taken apart.

 

[dik]

The attached may be of some help

 

[Jim Cliff]

Thanks all