MKD112D-027-GP0-BN

MKD Synchronous Motors

Rated 4.3 stars (8 total reviews)

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The MKD112D-027-GP0-BN servo motor is manufactured by Bosch Rexroth Indramat and belongs to the MKD Synchronous Motors series. Intended for closed-loop automation, the unit converts drive-amplifier current into precise rotary motion for machine tools, handling axes, and packaging stations. Its resolver-based commutation and high torque density enable the drive system to maintain commanded velocity even under varying mechanical load, making the motor suitable for coordinated multi-axis movement in industrial cells.

Mechanically, the motor delivers a continuous standstill torque of 48.0 Nm, giving the axis reserve to hold process loads without auxiliary brakes. It centers to the mounting plate with a 130 mm pilot diameter and bolts to a square flange that measures 192 mm across, dimensions that align with MKD gearbox adapters. The feedback system is a resolver feedback (RSF) device, supplying analog sine-cosine signals to the controller for commutation and position loops. Power, feedback, and brake leads emerge on Side B, allowing cabinet builders to orient the housing so cables exit away from adjacent mechanics. The designation “D” identifies the motor length, and the size code 112 defines stator diameter and laminated core depth.

Electrical energy routes through an output connector, allowing wiring to disconnect without opening the terminal box. The model ships without a holding brake, so load retention must come from the drive or external clamps. A keyed shaft, specified as a shaft with keyway, transmits torque to pulleys or couplings while preventing slip under acceleration. The winding identifier 027 links the stator to a specific voltage and current pairing, and relative position detection is managed by the control electronics. A shaft seal is present to limit lubricant loss and block dust ingress, and the feedback channel reports only incremental data, fitting the motor for systems that already include an absolute measuring device.

Technical Specifications

Centering diameter
130 mm

Connection Direction
Side B

Connection Type
Output connector

Continuous Torque at Standstill
48.0 Nm

Cooling
Natural cooling

Current
35 A

Efficiency
High efficiency

Encoder Type
Resolver feedback (RSF)

Feedback
Resolver feedback

Flange size
192 mm

Frequency
50/60 Hz

Holding Brake
Without holding brake

Motor Length
D

Motor Size
112

Mounting
Flange mounting

Position Detection
Relative

Power
15 kW

Product type
Servo Motor

Protection Class
IP65

Shaft Design
Shaft with keyway

Shaft Seal
Yes

Speed
3000 RPM

Voltage
400 V AC

Weight
45 kg

Winding Code
027

Frequently Asked Questions

What are the mechanical implications of the keyed shaft per DIN 6885 and shaft seal on the MKD112D-027-GP0-BN for backlash control and ingress resistance in servo gearhead couplings?

The parallel key transmits torque without clamp slippage, maintaining torsional stiffness for precision indexing. The sealing ring reduces lubricant washout and particulates ingress at the bearing journal, extending life in dusty or spray-prone stations.

Under natural convection, what thermal constants and duty assumptions govern the MKD112D-027-GP0-BN’s 48 Nm continuous standstill torque at 35 A, and how do surface cooling or overtemperature allowances shift continuous ratings?

Rexroth characterizes continuous torque with specified housing overtemperature and time constants; MKD112D shows ~90/40-minute thermal constants (natural/surface). Increased cooling or permitted ΔT elevates continuous torque while maintaining insulation limits and resolver stability.

How do the 130 mm centering diameter, 112 frame, and flange mounting of MKD112D-027-GP0-BN influence concentricity, shaft runout, and repeatable alignment when swapping motors on precision fixtures?

The pilot diameter locates the stator concentrically to the machine housing, controlling coaxiality independent of bolt clearance. That geometry stabilizes runout and simplifies repeatable replacement without re-boring adapter plates.

Is the MKD112D-027-GP0-BN’s IP65 protection and ~45 kg mass adequate for washdown-adjacent packaging lines without compromising bearing preload or connector sealing on Side-B terminations?

IP65 withstands dust and water jets, not immersion or caustic washdown; use shields in alkaline foams. Mass and Side-B connectors suit rigid conduit routing; maintain gasket integrity and torque values to preserve enclosure rating.

What cabling and EMC practices are recommended for MKD112D-027-GP0-BN resolver and power leads to minimize conducted emissions and angle noise in high-dI/dt cabinets?

Rexroth supplies pre-qualified cable sets with braided shields grounded 360° at entry to segregate motor/power from encoder routing and maintains minimum bending radii. Its ferrites and cabinet bonding reduce common-mode voltages near drives.

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Internal Product Review

Bosch Rexroth Indramat produces MKD112D-027-GP0-BN as a servo motor with a 112 frame (length D). It provides 48 Nm standstill torque and 100 Nm of peak at up to 3000 rpm. This motor uses RSF resolver feedback and a keyed, sealed DIN-6885 shaft to ensure precise commutation. It is suits machine tools, packaging lines and printing presses.