ASME Shaft Design Allowable Stress and Diameter Equations and Calculators _ Engineers Edge _ Www.engineersedge

ASME Shaft Design Allowable Stress and Diameter equations and calculators Hello visitor, your free 24 hour access is about to expire! Please consider becoming a Premium Member and getting unlimited access to the entire Engineers Edge network. All engineering, design and manufacturing calculators (1,000 +), Access all excel spreadsheet downloads, Online ebooks (thousands of pages of great stuff) , Geometric Boundaries II, Interpretation and Application of GD&T , Handbook for Machine Design and Engineers, Ingenious Mechanisms, Volume I, II, III, IV, Five Hundred and Seven Mechanical Movements Book, Design for Manufacturing and Assembly, Receive discounts on over 200 engineering, design and manufacturing books Machine Design and Engineering Electric Motor Design ASME Code Shaft Allowable Stress and ASME Code Shaft Diameter equations and calculators

The objective is to calculate the shaft size having the strength and rigidity required to transmit an applied torque. The strength in torsion, of shafts made of ductile materials are usually calculated on the basis of the maximum shear theory. ASME Code states that for shaft made of a specified ASTM steel: Ss(allowable) = 30% of Sy but not over 18% of Sult for shafts without keyways. These values are to be reduced by 25% if the shafts have keyways. Shaft design includes the determination of shaft diameter having the strength and rigidity to transmit motor or engine power under various operating conditions. Shafts are usually round and may be solid or hollow. Shaft torsional shear stress: Ss = T*R / J Polar moment of area: J = π*D4 / 32 for solid shafts J = π*(D4 - d4) / 32 for hollow shafts Shaft bending stress: Sb = M*R / I Moment of area: I = π*D4 / 64 for solid shafts

I = π*(D4 - d4) / 64 for hollow shafts The ASME Code equation for shafts subjected to: torsion, bending, axial load, shock, and fatigue is: Shaft diameter cubed, D^3 = (16/π*Ss(1-K4))*[ ( (KbMb + (α*F α *D*(1+K2)/8 ]2 + (Kt*T)2 ]0.5 Shaft diameter cubed with no axial load, D^3 = (16/π*Ss)*[ (KbMb)2 + (Kt*T)2 ]0.5 K = D/d D = Shaft outside diameter, d = inside diameter Kb = combined shock & fatigue bending factor Kt = combined shock & fatigue torsion factor Preview: V-Belts Design Calculator All calculators require a Premium Membership

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