R911311217 (MSK101D-0300-FN-M2-BG0-RNNN)

What should the coolant parameters (pressure, pH, temperature) be to preserve motor reliability?

The system must maintain coolant pH between 6 and 8, pressure under 3.0 bar, and inlet temperature not lower than ~5 °C below ambient to avoid condensation.

During fast acceleration, how close to the 160 Nm peak torque can the motor reliably operate?

The 160 Nm is a dynamic peak, typically permissible for short bursts of seconds without overheating rotor or windings. For repeated cycles, duty factors and thermal limits must be evaluated, else the motor may trigger overcurrent or thermal protection.

What drive voltage or current headroom is generally required given the 34.9 A continuous and 137.7 A peak ratings?

The drive should provide current capacity well above 137.7 A margin plus voltage margin to overcome inductive drop; a drive with ~1.5×–2× peak current rating is often safer. Also, supply voltage should be high enough to push current through the 0.19 Ω winding resistance during transients.

What does “increased concentricity” imply for mounting and coupling?

Higher concentricity tolerance reduces vibration, backlash, and bearing loads when directly coupling to precision gearboxes or spindles. It allows tighter tolerances in mechanical alignment, improving lifetime and performance.

How many pole pairs does this motor use, and what is the resulting synchronous speed?

The MSK101D-0300 uses 4 pole pairs (8 poles), giving synchronous speed around 4,600 rpm at 50 Hz for this winding code.

MSK101D0300FNM2BG0RNNN

MSK101D 0300 FN M2 BG0 RNNN

MSK-101D-0300-FN-M2-BG0-RNNN

The MSK101D-0300-FN-M2-BG0-RNNN servomotor from Bosch Rexroth is a liquid-cooled IndraDyn S model with a plain shaft and no holding brake. It features a multiturn absolute optical encoder (EnDat2.1) with 2048 signal periods, delivering 57.0 Nm continuous and 160.0 Nm maximum torque. This motor is well-suited for CNC machines, robotics, and packaging automation.