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Motor on gear unit
8.2
Clamping hub
8.2.1
Tightening torques
8.2.1.1
Clamping hub inter-
nal diameter [mm]
8
9
11
14
16
19
24
28
32
38
Version: 2.0
If a motor is included in the scope of delivery:
Motors included in the scope of delivery are pre-mounted.
For optimum performance data, we recommend attachment to
Beckhoff AM8xxx synchronous servomotor.
Requirements for the attachment of a motor to the gear unit:
• Design B5
• Concentricity and axial run-out tolerance according to EN 50347
• Smooth shaft
• Motor attachment if possible in a vertical position
The following table provides a description of the clamping hub:
Infographic
• Clamping screw according to ISO 4762
8.2.1.1
The value for the tightening torque [1] of the clamping screw is
punched into the clamping hub from above.
Information on the screw sizes and tightening torques can be found
in the table below:
Quality of clamping hub bolt = strength class 12.9
Clamping screw H
Width across flats
M3
M3
M4
M5
M6
M6
M8
M6
M10
M10
Mechanical installation
Posi-
Name
tion
H
Clamping bolt
I
Clamping ring
J
Spacer sleeve
K
Grooved motor shaft
L
Smooth motor shaft
Tightening torque
[mm]
[Nm]
2.5
2
2.5
2
3
4.1
4
9.5
5
14
5
14
6
35
5
14
8
79
8
79
AG2250
Maximum axial
force [N]
70
70
70
70
150
150
220
220
300
300
───
77
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