R911294649 (MHD112C-035-PG3-BN)

MHD Synchronous Motors

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The R911294649 (MHD112C-035-PG3-BN) is a Bosch Rexroth synchronous AC servo motor from the MHD class 112 series. It is designed for dynamic automation systems, integrating electronic commutation and a favorable torque to inertia mass ratio for precise start-stop operations. The unit supports both natural and surface cooling methods, offering compatibility with radial and axial blowers. Technical features include a 70 Nm holding brake, plain shaft with seal, digital servo feedback with absolute position detection exceeding 4096 revolutions, and liquid-cooled housing. The motor provides 38.0 Nm continuous torque at standstill, has a centering diameter of 130 mm, flange size of 192 mm, and weighs 45 kg. It operates at temperatures up to 45 °C and achieves IP65 protection. The power connection is directed to side B, utilizing an output connector. Compatible flange and connector types are INS0680 and INS0481.

Technical Specifications

Class
MHD class 112

Pole Pairs
4

Torque Constant at 20 degrees Celsius
119.1 V/1000 min⁻¹

Voltage Constant
1.37 Nm/A

Installation Position
Any

Torque to Inertia Mass Ratio
Favorable

Commutation
Electronic

Cooling Type
Natural convection, surface cooling

Housing Design
Compatible with radial or axial blowers

Housing Coat
Black prime coat

Flange Socket
INS0680

Connector
INS0481

Output Shaft
With keyway

Holding Brake
70 Nm

Servo Feedback
Digital with integrated multiturn absolute encoder

Weight
45 kg

Operating Temperature
45° C or less

Protection Degree
IP 65

Frequently Asked Questions

Why specify a sealed plain shaft, and which coupling practices minimize fretting and contamination risk?

The plain shaft with an integrated seal limits coolant or dust ingress into the front bearing cavity for protecting lubricant and bearings. It is important to use balanced, clamp-style couplings with proper alignment and preload to avoid micro-movement and fretting under reversing torsion.

How do the 192 mm flange and 130 mm centering diameter affect mounting accuracy for MHD112C-035-PG3-BN?

The standardized flange and pilot interface provide kinematic repeatability and concentricity for simplifying alignment with precision gearheads or belt pulleys. Its larger pilot engagement raises bending stiffness for reducing runout-induced vibration on high-speed positioning axes.

ow is the 70 Nm holding brake on MHD112C-035-PG3-BN applied for vertical axes or safety stops?

The brake secures a stationary load during power-off or drive disable, while it is not a dynamic emergency-stop device. It is important to size the brake to static loads and back-driving risk, as it rely on the drive for controlled deceleration.

What is the function of the side-B power-connector orientation on MHD112C-035-PG3-BN regarding cabinet layout and cable strain relief?

Its side-B routing keeps the power lead clear of encoder/feedback cabling and machine structures for easing harness dressing. It also facilitates shorter, protected cable runs to moving axes for reducing bending stress and improving EMC performance.

How does the torque-to-inertia character of the MHD112C architecture influence motion profiles in packaging or pick-and-place service?

Its favorable ratio lets the drive command higher accelerations without overshoot to improvesettle times and registration accuracy. It benefits start-stop indexing, electronic gearing and multi-axis synchronization where tight repeatability is critical.

Common Misspellings

Internal Product Review

Bosch develops the servo motor MHD112C-035-PG3-BN in a 112-frame size and it has an integrated liquid-cooling system in the housing. It possesses a sealed plain shaft for secure rotational operations and it offers 38 Nm stall torque. This motor is equipped with a 70 Nm brake and an absolute digital feedback system to enable precise positioning. It has 192 mm flange/130 mm pilot and side-B power connector to suit CNC, packaging and web-printing lines.

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.