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0.005
0.004
0.003
0.002
0.001
0
0
RIGIDITY
Table I-6 Geometrical Moment Inertia of Guide Rails
I-9
By utilizing four-point contact structure, the BG type provides extremely high rigidity. Figure I-6 shows deflection
of each size of long block against radial load. Table I-6. shows the geometrical moment inertia of guide rails.
Figure I-6 Block Deflection against Radial Load
block defelection (mm)
BG20A BG26A BG33A
200 400 600 800 1000
load (N)
BG26A
BG55A
geometrical moment
inertia ( mm 4 part )
mass
number IX(X Axis) IY(Y Axis) (kg/100mm)
BG20 6.50 10 3
6.00 10 4
0.25
BG26 1.69 10 4
BG33 5.11 10 4
BG46 2.42 10 5
BG55 2.29 10 5
1.47 10 5
3.42 10 5
1.49 10 6
2.28 10 6
0.38
0.60
1.24
1.50
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