Technical data

Rexroth IndraDyn T Appendix for Motor Sizes 530G and 530L 15-5

DOK-MOTOR*-MBT********-PR03-EN-P

15.3 Shaft End Dimensioning

Due to installation tolerances on the system, it may not be possible to

install the rotor co-axially in the stator. As a result, radial forces may occur

in the motor during operation, also affecting the shaft end to which the

rotor is attached.

To ensure sufficient rigidity of the drive system,

• the required minimum air gap after assembling the rotor and stator,

and

• the resulting radial forces in operation (Fig. 15-4)

must be taken into account when dimensioning the required shaft

diameter.

Therefore, the shaft diameter must be dimensioned in such a manner that

the required air gap S2 (see dimension sheet in Fig. 15-9) after

assembling the rotor and stator – taking into acount the bowing of the

shaft – is not less than the minimum value anywhere.

Rotor size MRT.... Rotor and stator, assembled

min. air gap s

(see dim. sheet, Fig.15-9)

radial_operation

[N]

530G 4,560

530L

0.35mm

6,840

Fig. 15-4: Radial forces acting in operation

Note: Dimension the shaft diameter in which the spacer sleeve for

the rotor is to be inserted sufficiently to limit bowing.

Also heed the information regarding radial forces that can

occur during assembly (Chapter 11.3 “Mechanical

Installation”).