MCD (e)
Service speed: 80000 rpm
Weight: 700 grams
Balance quality: G0.4
MCD (e)
m = 9549 G/n
MCD (e)
m = 9549 x 0.4
80000 = 0.048
m
So Permissible Unbalance (U per ) = 0.048
m x 0.7 kg
So Permissible Unbalance (U per ) = 0. 034 gmm TOTAL
Permissible Unbalance ( Uper ) at C of G = 0. 034 gmm TOTAL
For Symmetrical Rotor = 0. 017 gmm Per Plane
But this is NOT a Symmetrical Roto
e
35% 65%
Left plane radius: 15 mm
Right plane radius: 9.5 mm
Permissible Unbalance ( Uper ) = 0.034 gmm TOTAL
Uper Left = 0.034 x 65% = 0.022 gmm = 0 .0015 g @ 15 mm
Uper Right = 0.034 x 35% = 0.012 gmm = 0. 0013 g @ 9. 5 mm
Applying ISO 1940 on Aerostatics Spindle @ G1
Service speed: 80000 rpm
Weight: 700 grams
Balance quality: G1
MCD (e)
m = 9549 G/n
MCD (e)
m = 9549 x 1
80000 = 0.12
m
So Permissible Unbalance (U per ) = 0.12
m x 0.7 kg
So Permissible Unbalance (U per ) = 0. 084 gmm TOTAL
Permissible Unbalance ( Uper ) at C of G = 0. 084 gmm TOTAL
For Symmetrical Rotor = 0. 042 gmm Per Plane
But this is NOT a Symmetrical Roto
Left plane radius: 15 mm
Right plane radius: 9.5 mm
Permissible Unbalance ( Uper ) = 0.084 gmm TOTAL
Uper Left = 0.084 x 65% = 0.055 gmm = 0 .0036 g @ 15 mm
Uper Right = 0.084 x 35% = 0.03 gmm = 0. 003 g @ 9. 5 mm
21
Applying ISO 1940 on Aerostatics Spindle @ G0.4
C of G
C of G
