Technical data

Rexroth IndraDyn H Notes Regarding Application 9-19
DOK-MOTOR*-MBS-H******-PR02-EN-P
The rotor consists of a steel sleeve with permanent magnets on the
inside. Depending on the rotor type, the spindle has several fitting
surfaces arranged next to each other; these have slightly graduated
diameter tolerances. The rotor and the spindle are frictionally engaged
by the fitting surfaces, which align the assembled rotor to the spindle.
Due to the lack of pressurized oil connection, the advantages of this
rotor design over the rotors with a step interference fit include:
• a more compact shape and
• an ability to convert a larger rotor internal diameter within the same
amount of space.
The rotor is attached by shrink-fitting it onto the spindle.
The spindle construction in the area of the rotor bore must correspond to
the information in the dimension sheets of the corresponding motor in
chapter 5.
In this model, the rotor cannot be removed from the spindle without
destroying it.
Note: When laying out the motor remember that the rotor with the
“1N” design (smooth bore) cannot be removed from the
spindle without destroying it after it has been shrink-fitted.
Due to the required interference fit, the rotor sleeve must be heated up
to 135°C – max. 145°C before assembly.
CAUTION
Damage of the magnets within the rotor due to
temperatures above 145°C!
⇒ Heating of the rotor sleeve must be monitored.
⇒ Heating the rotor sleeve above 145°C is not
permitted.
Due to the material expansion, the fittings of the rotor bore expand.
At the same time, the spindle must be cooled to –20°C.
The rotor and spindle can then be joined in this state without force.
Note: Disassembly of the rotor with “1N” design (smooth shaft) is
not possible!
After assembly, the rotor is balanced to the necessary vibration severity
grade (EN 60034-14:2004). To achieve equilibrium of the rotor, threaded
pins are radial screwed into the circumference of the balancing ring and
secured using glue.
Assembly
Dismantling
Balancing