Car hoist screws bronze nuts

[Lanza]

Hello
I'm replacing two bronze nuts for the raise/lowering screws on a car hoist. The screws also have a safety steel nut above
I will be making them out of a PB1 bronze.
I will attach the link for the material I plan to order

https://www.kormax.com/material/pb1-phosphor-bronze/

They are a trapezoidal 40x6 size
My question is where do I find a calculation so I can reverse engineer what load the bronze nut material is designed to take?
Any sites you recommend or book?

Thank you
Lance

 

[TugboatEng]

This should cover everything.

https://engineerexcel.com/acme-thread-calculations/