R911288241 (MHD112C-058-PG3-AN)

MHD Synchronous Motors

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The R911288241 (MHD112C-058-PG3-AN) is a Bosch Rexroth synchronous servo motor equipped with a spindle motor, brake chopper, and drive controller. It features a dual cooling system that supports natural and liquid cooling modes, achieving a torque of up to 148 Nm with a maximum current of 239 A. The thermal time constant ranges from 90 to 40 depending on the cooling type. The motor incorporates a digital multiturn absolute encoder with position detection accuracy greater than 4096 revolutions. It has a holding brake rated at 70 Nm, a continuous standstill torque of 38 Nm, and supports power outputs up to 8 kW at 3500 rpm (100 K temperature, natural cooling). The plain shaft features a shaft seal and connects via an output connector oriented to side A. The unit is designed for operation at ambient temperatures from 0 to +40°C and transport between -20 and +80°C. Major dimensions include a flange size of 192 mm, centering diameter of 130 mm, and motor size 112, with motor length specified as C. Winding code is 058.

Technical Specifications

Theoretical Torque
148 Nm

Maximum Current
239 A

Weight-to-performance ratio
High

Thermal Time Constant
90 or 40 depending on cooling method

Continuous Torque (at 60/100 K temperature)
57 Nm

Rated Rotational Speed (at 60/100 K temperature)
3500 rpm

Rated Frequency (at 60/100 K temperature)
233 Hz

Cooling Method
Natural and Liquid

Rated Power (in natural cooling)
8 kW

Rated Torque (in natural cooling)
16.9 Nm

Rated Speed (in natural cooling)
3500 rpm

Defined Ambient Conditions
0 to +40 degree Celsius

Storage and Transportation Conditions
-20 to +80 degree Celsius

Torque Constant
0.8 Nm/A

Winding Resistance
0.12 ohms

Weight
45 kilos

Encoder
Integrated Multiturn Absolute

Output Shaft
Plain

Holding Brake
3.8 kg, 70 Nm

Frequently Asked Questions

How does digital servo feedback with absolute (>4096 rev) detection benefit commissioning and uptime?

The absolute multi-turn feedback provides deterministic position on power-up for eliminating routine homing cycles after outages. It also enhances closed-loop stiffness and reduces cumulative index errors during frequent start/stop sequences.

What role does the 70 Nm holding brake play in safety and positioning for MHD112C-058-PG3-AN?

The integrated holding brake delivers 70 Nm static torque to secure axes at rest or during E-stop without relying on external clamps. It minimizes drift on vertical or offset loads and shortens restart homing procedures.

How does the liquid-cooled housing on MHD112C-058-PG3-AN improve servo performance during prolonged duty?

Its liquid cooling draws heat away from the stator/lamination stack for maintaining winding resistance within design limits and keeping torque linearity stable. It sustains repeatable positioning under extended cycles and reduces thermal derating in dense machine layouts.

What installation advantages come from the power connection directed to side A on MHD112C-058-PG3-AN?

The side-A routing shortens cable runs in cabinets laid out for left-hand exits for improving EMC by minimizing loop area. It also eases dress-pack design on gantries where bend radii and service loops are constrained.

How does the plain shaft with integrated seal on MHD112C-058-PG3-AN affect longevity in harsh environments?

The plain-shaft geometry offers flexible coupling choices while the seal limits ingress of fines and emulsions. Its reduced contamination of front bearings preserves preload and lowers lubricant breakdown across washdown-adjacent stations.

Common Misspellings

Internal Product Review

The Indramat’s MHD112C-058-PG3-AN servo motor features a digital servo feedback that offers absolute multi-turn detection. It is equipped with a 70 Nm holding brake and its winding designation allows 38 Nm of continuous standstill torque to support precise stops. This motor possesses a plain-shaft with seal and 192 mm flange/130 mm pilot, as well as side-A connector for simplifying mounting in different industrial setups.

1620 Old Apex Road
Cary, NC 27513, USA

Toll Free: 1-888-551-3082
International: 1-919-443-0207

Fax: 1-919-867-6204

[email protected]

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North Carolina Office

Indramat USA
1620 Old Apex Road
Cary, NC 27513
USA

Phone

Toll Free: 1-888-551-3082
International: 1-919-443-0207

Indramat USA sells factory new and pre-owned surplus products and maintains channels to procure supply. Indramat USA is not affiliated with nor an authorized distributor or representative of any manufacturers, brands or products listed. Designated trademarks, brand names, and brands appearing herein are the property of their respective owners.