MRS162B-2N-0060-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS162B-2N-0060-NNNN is part of the MRS Synchronous IndraDyn H Motors series and features a 60 mm internal rotor diameter with a step interference fit bore. It delivers a rated power of 20.9 kW, rated torque of 50 Nm, and a rated speed of 4000 rpm with a rated current of 42 A. The motor has a protection code of IP00 and a maximum current of 110 A.
Internal Product Review
The MRS162B-2N-0060-NNNN is a Bosch Rexroth Indramat synchronous IndraDyn H motor built for high-output servo applications. Rated for 20.9 kW at 4000 rpm, the motor delivers efficient high-speed performance in demanding motion systems. A 50 Nm rated torque with 115 Nm maximum torque gives the design excellent overload capability, making peak torque a standout strength.
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Product Description:
The Bosch Rexroth Indramat MRS162B-2N-0060-NNNN is a frameless synchronous motor rotor delivered within the MRS Synchronous IndraDyn H Motors series. Intended for integration inside a matching stator, the unit forms the rotating element that turns electromagnetic energy into torque. Its step interference-fit bore allows rigid mounting on precision shafts, letting machine builders create compact direct-drive axes without couplings or belts. In automated tooling, packaging, and semiconductor positioning, the rotor supports high-speed motion while keeping backlash and maintenance to a minimum.
In continuous service, the paired motor generates 50 Nm at the shaft and maintains a constant 4000 rpm. This operating point corresponds to 20.9 kW of mechanical output drawn from a phase current of 42 A. The protection designation IP00 indicates that the assembly is supplied without an enclosure, so the surrounding machine frame or stator jacket must handle cooling and contamination control. Four pole pairs set the synchronous relationship between supply frequency and shaft speed, while a winding resistance of 0.24 Ω contributes to copper losses under steady load. A 60 mm internal rotor diameter and a 60 × 4 mm O-ring support sealed shaft interfaces where required.
Short-term overload capability reaches 115 Nm when the inverter supplies up to 110 A for acceleration or process transients. The laminated steel core presents a rotational inertia of 0.016 kg·m², balancing fast response with vibration damping in multi-axis gantries. A voltage constant of 90 V/1000 rpm indicates the back EMF the control electronics must overcome, allowing precise field-oriented regulation across the speed range. The 8.1 kg rotor mass and the step interference-fit bore help maintain concentricity during sustained high-speed duty cycles.
