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Oriental Motor Asia Pacific Pte. Ltd. > Technical Support > Motor Selection Calculations 03

Selection calculation motor

Moment of inertia J [Kg · M 2 calculation formula]
Motor selection formula
Moment of inertia J [Kg · M 2 calculation formula]
Formula for the inertia J[kg・m2]
    Calculate the Moment of Inertia
    Inertia of a Cylinder
    Inertia of a Hollow Cylinder
    Inertia on Off-Center Axis
    Inertia of a Rectangular Pillar
    Inertia of an Object in Linear Motion
    Conversion formula for the moment of load inertia of the motor shaft when using a deceleration gear
Formula for the relation between J and GD2

    Density

    Stainless steel (SUS304)

    ρ=8.0×103[kg/m3

    Iron

    ρ=7.9×103[kg/m3

    Aluminium

    ρ=2.8×103[kg/m3

    Brass

    ρ=8.5×103[kg/m3

    Nylon

    ρ=1.1×103[kg/m3

    Jx

    : : Inertia on x-axis [kg·m2

    Jy

    :: Inertia on y-axis [kg·m2

    Jx0

    : : Inertia on x0-axis (axis passing through center of gravity )[kg·m2

    m

    : : Mass[kg]

    D1

    : : Outer diameter[m]

    D2

    : : Inner diameter [m]

    ρ

    : : Density[kg/m3

    L

    : : Length[m]