FLENDER ZAPEX - 5.3 Aligning the Coupling

Assembly
5.2 Mounting the coupling
M3560-02en Edition 09/2022 33
5.2.3 Assembling the coupling5.2 Mounting the coupling
Procedure
1. Smear the gear of the coupling part 1(1) and 2(2) with a lubricant coating (e.g. Castrol
Opticoating N) to minimise running-in wear.
2. Oil the sealing surfaces on the hub circumference of coupling parts 1 (1) and 2 (2).
3. For ZNNV and ZNZV types, screw the thrust element (34) into the lower machine shaft.
4. Push the flanged sleeves (5) onto the gear of coupling parts 1 (1) and 2 (2). Hold the
flanged sleeves (5) or support them.
5. For the ZNNA type, position the axial backlash limitation (51) in the flanged sleeve (5).
6. For ZNNV and ZNZV types, place the support ring (33) in the flanged sleeve (5) and on
the thrust element (34).
7. Move the machines to be coupled close to one another. Observe the clearance S (see
Clearance S (Page66) )
8. Align the coupling (see chapter Aligning the coupling (Page33)).
9. Smear the sealing surfaces of the flanged sleeve (5) and, if fitted, of the spacer (4), with
liquid plastic (50).
10.Align the fitting holes of the flanges. Observe any markings that might be provided.
11.Insert the fitting bolts (8) and tighten the nuts (9) to the specified tightening torque T
A
(see chapter Tightening torques and widths A/F (Page68)).
5.3 Aligning the coupling5.3 Aligning the coupling
5.3.1 Purpose of alignment5.3 Aligning the coupling
The shafts that are joined by the coupling are never on an ideal precise axis but have a cer-
tain amount of misalignment.
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
• Reduced restoring forces
• Misalignment reserves for operation of the coupling
To achieve the longest possible coupling service life, Flender recommends running the coup-
ling with 20% of the possible misalignments during operation (see Possible misalignment
(Page34)).