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 Deflection in a shaft Post Reply Forum
 Posted by: JamesVernon ® 05/18/2004, 09:39:25 Author Profile Mail author Edit Hey, I'm looking to find how much twist I have in a long drive shaft.  The shaft is driven over 15 ft from one end, and I want to select a suitable drive shaft which will have minimum twist.  Does anyone know the calculations I would need?  Thanks -James

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 Re: Deflection in a shaft Re: Deflection in a shaft -- JamesVernon Post Reply Top of thread Forum
 Posted by: jcmcgraw ® 05/18/2004, 13:59:09 Author Profile Mail author Edit According to the "Machinery's Handbood" the formula for Torsional Deflection of circular shafts is... For a solid circular shaft the torsional deflection in degrees is given by: < = (584Tl)/(D^4G) < = angular deflection in degrees D = diameter of shaft in inches G = torsional modulus of elasticity = 11,500,000 lbs/square inch for steel T = torsional or twisting moment in inch-pounds l = length of shaft in inches Hope this helps.