Calculate slew motor torque and flow for rotating superstructure on excavators and cranes
Input Parameters
Results
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Moment of Inertia
slug-ft²
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Swing Torque Required
ft-lb
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Motor Displacement
cu in/rev
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Flow Required
gpm
Reference
I = m × R² (moment of inertia for point mass approximation)
Torque = I × α (angular acceleration = ω / time)
Motor torque = swing torque / gear reduction
1.3× safety factor for dynamic loads and friction