Maintenance/repair
Installation of a spring−applied brake
Rotor replacement
8
45
Lenze ¯ BA 33.0005 ¯ 5.0
8.3.8 Rotor replacement
Danger!
The brake must be free of residual torque.
1. Loosen the connecting cable.
2. Evenly release the screws and remove them completely.
3. Completely remove the stator from the end shield. Observe the connecting cables.
4. Completely remove the rotor from the hub.
5. Check the toothed part of the hub.
6. In case of wear, replace the hub, too.
7. Check the friction surface of the end shield. If the flange / friction plate is severely
gouged, it must be replaced. If the end shield is severely gouged, the friction
surface must be reprocessed.
8. Measure the rotor thickness (new rotor) and the height of head of the sleeve bolts
using a caliper gauge.
9. The distance between the stator and the armature plate is calculated as follows:
Distance = rotor thickness + s
Lrated
− height of head
"s
Lrated
" ( 45)
10.Evenly remove the sleeve bolts until the calculated distance is reached between
the stator and the armature plate.
11.Mount and set new complete rotor and stator, ( 46).
12.Connect the connecting cable again.
8.4 Installation of a spring−applied brake
8.4.1 Brake characteristics
Brake size s
LN
+0.1 mm
−0.05 mm
s
Lmax.
service brake
s
Lmax.
holding brake
Max. adjustment,
permissible wear
path
Rotor thickness Tightening torque
of the fixing
screws
[mm] [mm] [mm] [mm] min.
1)
[mm] max. [mm] [Nm]
06
0.2 0.5 0.3 1.5
4.5 6.0 3.0
08 5.5 7.0 5.9
10 7.5 9.0 10.1
12
0.3 0.75 0.45
2.0 8.0 10.0 10.1
14 2.5 7.5 10.0 24.6
16 3.5 8.0 11.5 24.6
18
0.4 1.0 0.6
3.0 10.0 13.0 24.6
20 4.0 12.0 16.0 48.0
25 0.5 1.25 0.75 4.5 15.5 20.0 48.0
Tab. 3 Characteristics of the spring−applied brake
1) The dimension of the friction lining allows for adjustment of the brake for at least five
times.
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