R911325108 (MSK101D-0300-FN-S2-LG2-RNNN)

How should the holding brake be integrated in a CNC axis when power fails?

The electrically released brake supplies 70 Nm holding torque, so you must command it to engage before drive power is removed and accommodate its disconnection delay (milliseconds) to prevent unwanted motion. Also, ensure the brake’s inertia and torque are included in the control model.

What positional accuracy can you expect from the singleturn EnDat 2.1 encoder with 2048 signal periods?

You get ≈ 0.18° resolution (360°/2048) per revolution, but absolute accuracy depends on encoder interpolation, system latency, and mechanical play—so real-world repeatability is typically tighter than raw counts.

What fluid properties and circuit limits must be respected in the coolant loop?

The motor datasheet mandates coolant pH 6–8, maximum inlet pressure ~3.0 bar, and dew point margin (coolant temperature must be ~5 °C below ambient to avoid condensation)

How does the plain shaft design influence coupling and alignment choices?

The plain shaft requires a suitable coupling (e.g. flexible, jaw, or bellows type) and precise alignment to minimize runout or bearing loads; misalignment adds parasitic torque and reduces system stiffness. Also consider thermal expansion compensation.

What limitation does the maximum current (137.7 A) place on drive sizing for transient loads?

The drive must deliver high peak current during acceleration without voltage collapse or converter DC bus drops; choose a servo amplifier and power supply that can reliably deliver 137.7 A pulses plus margin for voltage drop and cabling losses.

MSK101D0300FNS2LG2RNNN

MSK101D 0300 FN S2 LG2 RNNN

MSK-101D-0300-FN-S2-LG2-RNNN

The MSK101D-0300-FN-S2-LG2-RNNN servomotor from Bosch Rexroth is used in CNC machines, robotics, and packaging systems. It includes a 70 Nm electrically released holding brake and delivers 57.0 Nm continuous torque. The motor features liquid cooling and a singleturn optical encoder with 2048 signal periods.