BELGITRANS the professional association for industrial drive technologies

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BELGITRANS
BECI Louizalaan 500
1050 Brussels
Tel: 02/640.84.32
info@belgitrans.be

Formulas

Moment of inertia and "GD²"

Up till now, the common concept of "GD²" in the technical system has not been included in the SI. To calculate the moment of inertia J, not only must the units be included, but the other definition as well.

m : Mass : kg
v : Speed : m/s
G : Mass : kgf
J : Moment of inertia : kgm²
n : Number of revolutions : tr/min
d_ext : External diameter : m
d_int : Internal diameter : m
r_ext : External radius : m
r_int : Internal radius : m
l : Length : m
G : Weight : kgf
d : Diameter : m
γ : Specific weight : kgf/dm³
r² : Radius : m
GD² : Moment of inertia : kgfm²
ρ : Density : kg/m³
v² : Speed : m₂
ω² : Angular velocity : rad/sec