7. Tighten up the set screw or the screw to attach the end plate to the specified tightening
torque T
A
(for the set screw please see section Machining an axial locking mechanism
(Page 26)).
8. If you have removed the flexible elements (12), reinstall them.
9. Tighten the bolts in the coupling part 2 (2) and 3 (3) to the specified torque T
A
(see section
Tightening torques and widths A/F (Page 63)).
5.3 Aligning the coupling
5.3.1 Purpose of alignment
The shafts that are joined by the coupling are never on an ideal precise axis but have a certain
amount of misalignment.
Misalignment in the coupling leads to restoring forces that can stress adjacent machine parts
(e.g. the bearings) to an unacceptable extent.
The misalignment values in operation result from the following:
● Misalignment due to assembly
Incorrect position due to a lack of precision when aligning
● Misalignment due to operation
Example: Load-related deformation, thermal expansion
You can minimise misalignment by aligning after assembly. A lower misalignment in the
coupling has the following advantages:
● Reduced wear of the elastomer components
● Reduced restoring forces
● Misalignment reserves for operation of the coupling
You can find the maximum permitted shaft misalignment values during operation in section
Shaft misalignment values during operation (Page 62).
Assembly
5.3 Aligning the coupling
N-EUPEX / N-EUPEX DS 3100en
Operating Instructions 10/2017 31
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