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 torque?? Post Reply Forum
 Posted by: ghegdahl ® 07/05/2004, 12:15:03 Author Profile Mail author Edit can anybody give me a rough idea how many ft lbs of torque a 1 and half inch steel bar can withstand?? thank you

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 Re: torque?? Re: torque?? -- ghegdahl Post Reply Top of thread Forum
 Posted by: mikebull ® 07/06/2004, 07:41:25 Author Profile Mail author Edit The formulae is :- Torque (lb.ft) = allowable stress (psi) x Pi x D^3/16 /12 So for a 1.5" steel bar with a working allowable of 8000 psi you can safely transmit 442 lb.ft. If you have a step or other stress concentration in the shaft then the torque will have to be less by this factor (between 1 and 3 ?) Every mechanics textbook will give you the above info.

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 Re: torque?? Re: Re: torque?? -- mikebull Post Reply Top of thread Forum
 Posted by: ghegdahl ® 07/06/2004, 10:50:36 Author Profile Mail author Edit thank you

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