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R911285765 (MKD112C-024-KP3-AN)

MKD Synchronous Motors

Rated 4.6 stars (7 total reviews)
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1 Year Warranty Included
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Expedited Lead Times on Select Parts
1 Year Warranty Included
Free Ground Shipping

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5 Minutes 11 Seconds

The Bosch Rexroth R911285765 (MKD112C-024-KP3-AN) is a synchronous servo motor featuring electronic commutation and a flange designed according to DIN 42948. It incorporates a data-memory enabled encoder providing resolver feedback with absolute position detection over more than 4096 revolutions. The unit offers a continuous torque at standstill of 38.0 Nm and utilizes natural convection for cooling. The rated current is 8.2 A at a rated voltage of 372 V, the peak current reaches 65 A, and the rotor inertia is 0.0933 kg·m². The holding brake supplies 70 Nm of torque. The motor is protected to class IP65, has a thermal time constant of 90 minutes, winding resistance of 0.44 Ω at 20°C, and weighs 48 kg. Standard construction is resistant to diluted acids, lyes, chalking, and discoloration. Storage and transport temperatures are specified from -20°C to 80°C. Proper grounding and application within intended industrial environments are required.

Technical Specifications

Peak Torque Usage
Wide speed range

Attachement Specifications
Flange designed according to DIN 42948

Encoder
Comprises data memory for quick startup

Thermal Time Constant
90 minutes

Storage and Transport Temperature
-20°C and 80°C

Rotor Inertia
273 x 10-4 kgm2

Winding Resistance
0.44 Ohms at 20°C

Rated Current
8.2A

Rated Voltage
372V at 60K, natural convection cooling

Torque Reduction
15% to 20% when unpainted for food industry use

Brake
Electrically-releasing 70Nm holding brake

How does the resolver feedback with integrated absolute (>4096 rev) detection enhance commissioning repeatability on MKD112C-024-KP3-AN?

The resolver provides rugged sinusoidal position tracking while the integrated absolute encoder preserves multi-turn position across cycles to minimize homing time and cumulative indexing error. Its combination accelerates start-ups and improves synchronous axis alignment in multi-axis packaging or press applications.

Why specify a 70 Nm holding brake on MKD112C-024-KP3-AN for vertical or interrupted-motion axes?

The brake supplies static torque to prevent back-driving under gravity or shock for protecting tooling and fixtures during E-stops. It also stabilizes fixture position during metrology moves to reduce servo dither and thermomechanical drift.

What is the implication of the torque constant (kt ≈ 1.05 Nm/A) for drive sizing and thermal headroom?

The higher kt yields commanded torque at lower phase current for easing inverter RMS demand and copper losses. It simplifies current-loop tuning while preserving thermal margin under natural-convection cooling at mid-band speeds.

What role does the keyed shaft and shaft seal play in driveline integrity for MKD112C-024-KP3-AN?

The keyed interface transmits torque without fretting typical of purely frictional hubs to improve phase accuracy in cyclic loads. Its seal mitigates ingress of aerosols and fines for maintaining lubrication and encoder cleanliness in packaging and printing environments.

How does absolute multi-turn referencing on MKD112C-024-KP3-AN reduce cumulative registration error in multi-station lines?

The absolute position persists across power cycles, each station reacquires exact angular phase without homing traversals. It preserves print/register alignment and cut-to-mark accuracy over repeated starts.

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Internal Product Review

The Rexroth Indramat’s MKD112C-024-KP3-AN servo motor comes with a keyed design of shaft that has a sealing ring as well. It is equipped with a 70 Nm holding brake and it possess a resolver/absolute multi-turn feedback. This AC motor uses natural-convection surface cooling. It delivers a rated torque of 24 Nm and consumes 7.3 kW of power. Due to its precise position retention and reliable stall torque, it suits packaging lines, machine tools and printing/textile equipment.

Warranty

1-year-warranty
Indramat USA 1 Year Warranty

Repair

product repair We offer a repair service for the MKD112C-024-KP3-AN.
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