Maintenance and repair
Kendrion INTORQ | BA 14.0223 | 04/2022
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8.2
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 42 in the chapter Verschleiß von Federkraftbremsen, Page 42. 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.
Failures, production losses or damage to the system may occur when the brakes are not serviced. There-
fore, a maintenance strategy that is adapted to the particular operating conditions and brake loads must
be defined for every application. For the spring-applied brakes, the maintenance intervals and mainte-
nance operations listed in the table below must be followed. The maintenance operations must be carried
out as described in the detailed descriptions.
8.2.1
Maintenance intervals
WARNING
In safety-relevant applications that have periodic torque surges (e.g. due to dynamic brak-
ing processes), the rotors must always be replaced after 2 million cycles or 10 years at the
latest.
Versions
Holding brakes with emergency stop
BFK557
¾
at least every 2 years
¾
after 1 million cycles of holding brake operations, at the latest
¾
The brake must be replaced after 10,000 emergency stops at the latest; depend-
ing on your particular load conditions, the wear limit may be reached much earlier.
8.3
Maintenance
Notice
Brakes that have defective armature plates, springs, flanges or defective or worn rotors must
be completely replaced.
Observe the following for inspections and maintenance works:
¾
Contamination by oils and greases should be removed using brake cleaner, or the brake
should be replaced after determining the cause. Dirt and particles in the air gap between
the stator and the armature plate endanger the function and should be removed.
