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Chapter 1 Overview of the FHA-C series
4
2
A
B
A4
3 B
3 B
1
A
(2)
(1)
(4)
(3)
(3)
(4)
1-6 Mechanical accuracy of FHA actuators
The machining accuracy of the output flange and the mounting flange are indicated in the table below.
Machined accuracy of the output flange unit: mm
Machined parts FHA-17C FHA-25C FHA-32C FHA-40C
1. Axial run-out of output flange 0.010 0.012 0.012 0.014
2. Radial run-out of output flange 0.010 0.012 0.012 0.014
3. Parallelism between output flange and mounting flange 0.040 0.050 0.050 0.060
4. Concentricity between output flange to fitting face 0.040 0.050 0.050 0.060
Note: All values are T.I.R (Total Indicator Reading).
The measuring for the values are as follows:
• Axial run-out of output flange
The indicator (1) on a fixed portion measures the axial run-out
(T.I.R.) of perimeter of output flange for one revolution.
• Radial run-out of output flange
The indicator (2) on a fixed portion measures the radial run-out
(T.I.R.) of perimeter of output flange for one revolution.
• Parallelism between output flange and mounting flange
The indicator (3) on the output flange measures the axial run-out
(T.I.R.) of each perimeter of both sides of the fixing flange
for one revolution.
• Concentricity between output flange to fitting face
The indicator (4) on the output flange measures the radial run-out
(T.I.R.) of each surface of both fitting face (drive-end side
and opposite side) for one revolution.
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