Bosch Rexroth IndraDyn S - MKE Project Planning Manual

88/131 Bosch Rexroth AG | Electric Drivesand ControlsRexroth MKE Synchronous Motors | Project Planning ManualOperating Conditions and Application NotesGearbox mounting on motors●●couplingspinionsit is imperative that the following notes are observed.If gearboxes are mounted on motors, the thermal coupling of the motors onmachines or constructions changes.Depending on the gearbox type, the heat development on the gearbox is different.In any case, the heat dissipation of the motor via the flange is reducedwhen gearboxes are mounted. This must be observed in project planning.A reduction of the given performance data is necessary, to prevent overloadingof the motors when using gearboxes.Fig.9-19:S1 characteristic curve of gearboxesThe indicated torques in the characteristic curves of the motor haveto be reduced by 10-20 % when mounting gearboxes.Redundant bearingsPlease, heed all further notes and specifications within this documentation forthe used gearboxes.If drive elements are mounted, a redundant bearing must be avoided. The tolerancesinevitably present in such cases will lead to additional forces acting onthe bearing of the motor shaft and, should the occasion arise, to a distinctlyreduced service life of the bearing.If redundant attachment cannot be avoided, it is necessary to consultBosch Rexroth.CouplingsThe machine construction and the drive elements used must be carefully adaptedto the motor type so that the loading limits of the shaft and the bearing arenot exceeded.When connecting extremely stiff couplings, the radial force whichconstantly changes the angular position may cause an impermissiblyhigh load on the shaft and bearing.Ball bearing pinion or helical teethdrive pinionsOwing to thermal effects, the flange-sided end of the output shaft may shift by0.6 mm in relation to the motor housing. If skew bevel driving pinions or bevelgear pinions directly attached to the output shaft are used, this change in positionwill lead to