FLENDER COUPLINGS N-EUPEX 3103en, Assembly And Operating Instructions Manual, Page: 42 / 64

8.2 Maximum permissible torsional backlash
In order to calculate the torsional backlash, rotate one coupling part without applying torque up
to the stop. Mark both of the coupling halves in the way shown in the diagram below. Turn the
coupling part in the opposite direction up to the stop. The markings on both halves will then
move apart. The distance between the markings corresponds to the torsional backlash.
ෙ6
9
Figure 8-1 Markings for calculating the torsional backlash
Table 8-2 Maximum permissible torsional backlash for the types O and P
Size 125 140 160 180 200 225 250 280 315 350
Maximum permissible
torsional backlash ∆S
V
[mm]
8.0 8.0 8.0 8.0 8.5 9.0 10.0 11.5 10.5 11.5
8.3 Replacing wearing parts
DANGER
Danger due to bursting of the coupling
If you do not observe the information stipulated here regarding replacement of wearing parts,
this can lead to bursting of the coupling during operation. There is a risk of fatal injury from
flying fragments. Bursting of the coupling can lead to an explosion in potentially explosive
atmospheres.
• Please observe all the stipulations concerning the replacement of wearing parts.
Replace the flexible elements (12) if the maximum permissible torsional backlash has been
reached. The method used to replace the flexible elements (12) varies according to the coupling
type.
Servicing
8.3 Replacing wearing parts
Assembly and operating instructions 3103en
42
Edition 10/2020