calculate the torque required
calculate the torque required
(OP)
I have a 60000lb loaa on the end of a 3" stem with a 3 threads per inch ,acme. this needs to be raised by rotating thre not on the other end being i nsde a gearbox. What's the torque required ? any help thanks.





RE: calculate the torque required
RE: calculate the torque required
I have calculated the torque in frictionless scenario got 265ft_lbs
Considering:
Acme thread: 2a is 29degrees
pitch is 1/3: 3threads per inch
coefficient of friction: for bronze nut and stainless steel stem, lubricated I have found value from 0.05 to 0.12. that result in value of the torque from 500ft_lbs to 1,150ft-lbs.
So what is more real value the 500ft_lbs (about twice the value of frictionless) or the 1,150ft_lbs (four times more the frictionless value) ?
RE: calculate the torque required
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: calculate the torque required
http://duffnorton.com/Public/18503/StainlessSteelM...
RE: calculate the torque required
AUMA are furnishing the actuators.
as they are installed and miscomunication took placed between them and the manufactory of the stem, I have determined that we may have wrong actuator.
The miscommunication was generated by the fact that nominal torque is listen at 145o, then up to 10minutes for 950, 10 to 20 minutes to 670 and 20 to 30 minutes to 500.
SO what i know is the maximum force of 60000 to get this started.