Bearings; Connection Cables; Holding Brake-Commissioning And Maintenance Instructions - Bosch Rexroth IndraDrive Mi Project Planning Manual

140/152 Bosch Rexroth AG | Electric Drives
Commissioning, Operation, Diagnoses, Service and Maintenance

Bearings

Connection Cables

WARNING
Holding Brake–Commissioning and Maintenance Instructions
Before initial commissioning
During operation
and Controls
The nominal service life of the bearings is L10h > 30000 h according to
DIN ISO 281, ed. 1990, if the permissible radial and axial forces are not ex‐
ceeded.
The motor bearings should be replaced, if
● the nominal bearing service life has been reached
● running noise can be heard
We recommend that you have the bearings replaced by the Bosch
Rexroth service.
Check connection cables for damage in regular intervals and replace them, if
necessary.
Check any optionally present cable drag chains (flexible cable tracks) for dam‐
age.
Risk of injury by electric shock. Live parts with more than 50 V!
Do not repair any connection lines provisionally. If the slightest damage is de‐
tected in the cable sheath, the installation must be put out of operation imme‐
diately. Then the cable must be replaced.
Check the connection of equipment grounding conductor for proper status and
tight fit in regular intervals.
In order to ensure proper functioning of the holding brake, it must be checked
before the motors are installed.
Measure the holding torque (M4) of the holding brake. If necessary, grind in the
holding brake.
Measure the holding torque (M4) of the holding brake
1. De-energize the motor and secure it against re-energization.
2. Measure the transferable holding torque (M4) of the holding brake with a
torque wrench. Holding torque (M4) see "Technical Data".
● If the holding torque (M4) indicated is achieved, the motor is ready
for the assembly.
● If the holding torque (M4) indicated is not achieved, the subsequent
grinding process can be used to reconstitute the holding torque.
Grinding in the holding brake
1. At closed holding brake, turn the output shaft by hand, e.g. with the help
of a torque wrench, by about 5 revolutions.
2. Measure the holding torque (M4).
● If the holding torque (M4) indicated is achieved, the motor is ready
for the assembly.
● If the specified holding torque (M4) is not attained after several grind‐
ing-in processes, the holding brake is not operable. Please consult
Rexroth Service.
A missing holding torque of holding brakes caused by tear and corrosion can
lead to operational disturbances in machines and plants. For this case, Indra‐
Rexroth IndraDrive Mi | Project Planning Manual