Maintenance and repair
Kendrion INTORQ | BA 14.0217 | 07/2021
70
Component
Cause
Effect
Influencing factors
Rotor
Service braking
Wear of the friction lining
Friction work
Emergency stops
Overlapping wear during start and stop
of drive
Active braking via the drive motor with
support of brake (quick stop)
Start-up wear in case of motor mounting
position with vertical shaft, even when
the brake is not applied
Number of start/stop cy-
cles
Armature plate and
counter friction sur-
face
Rubbing and friction of the brake lining
Run-in of armature plate
and counter friction sur-
face
Friction work
Gear teeth of brake
rotor
Relative movements and shocks be-
tween brake rotor and brake shaft
Wear of gear teeth (pri-
marily on the rotor side)
Number of start/stop cy-
cles
Armature plate sup-
port
Load reversals and jerks in the backlash
between armature plate, adjustment
tubes and guide/cylinder pins
Breaking of armature
plate, sleeve bolts and
bolts or cylinder pins
Number of start/stop cy-
cles, braking torque
Springs
Axial load cycle and shear stress of
springs through radial backlash on re-
versal of armature plate
Reduced spring force or
fatigue failure
Number of switching op-
erations of brake
Tab. 17:
Causes for wear
9.2
Inspections
To ensure safe and trouble-free operations, the spring-applied brakes must be checked at regular intervals
and, if necessary, replaced. Servicing at the facility will be easier if the brakes are made accessible. This
must be considered when installing the drives in the plant.
Primarily, the required maintenance intervals for industrial brakes result from their load during operation.
When calculating the maintenance interval, all causes of wear must be taken into account. Refer to the ta-
ble Causes for wear, Page 70 in the chapter Verschleiß von Federkraftbremsen, Page 69. For brakes
with low loads (such as holding brakes with emergency stop function), we recommend a regular inspection
at a fixed time interval. To reduce costs, the inspection can be carried out along with other regular mainte-
nance work in the facility.
When there is low friction work for each switching operation, the brake's mechanical components may also
limit the service life. The rotor-hub connection, the springs, the armature plate and the sleeves are particu-
larly subject to operational wear.
