Maintenance and repair
INTORQ | BA 14.0217 | 09/2019
72
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 for wear must be taken into account. (Refer to the
table Causes for wear, Page 71). 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 maintenance work in the plant.
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 mainten-
ance operations listed in the table below must be followed. The maintenance operations must be carried
out as described in the detailed descriptions.
9.2.1
Maintenance intervals
Versions
Operating brakes
Holding brakes with emer-
gency stop
BFK458-□□ E / N
BFK458-□□ L
¾
according to the service life
calculation
¾
at least every 2 years
¾
or else every six months
¾
after 1 million cycles at the
latest*
¾
after 4000 operating hours at
the latest
¾
plan shorter intervals for fre-
quent emergency stops
* NOTICE: 10 million cycles for the L design type
9.3
Maintenance
Notice
Brakes with defective armature plates, springs or flanges 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.
¾
After replacing the rotor, the original braking torque will not be reached until the run-in op-
eration for the friction surfaces has been completed. After replacing the rotor, the run-in
armature plates and the flanges have an increased initial rate of wear.
