R911279045 (MKD112C-058-GG3-AN)

MKD Synchronous Motors

Rated 4.3 stars (11 total reviews)

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The Bosch Rexroth R911279045 (MKD112C-058-GG3-AN) servo motor is engineered for dynamic applications requiring rapid acceleration and deceleration, utilizing electronic commutation and a low inertia design. It features a closed-loop control with RSF resolver feedback for relative position detection and includes an integrated thermal sensor. The motor has a DIN 42948 compliant 192 mm flange, centering diameter of 130 mm, and a plain shaft with shaft seal. It includes a 70 Nm holding brake and a C-length housing of 660 mm. Rated performance is 3.9 kW power output, 15.3 Nm torque, 38.0 Nm continuous standstill torque, and a maximum speed of 3000 rpm. The unit operates at 400 V, has a peak current of 239 A, and a winding resistance of 0.12 ohm. Protection level is IP65. Moment of inertia is 7.63 kg·cm², and connection is made via output connector.

Technical Specifications

Product Type
Servo Motor

Continuous Torque During Standstill
38 Nm

Continuous Current During Standstill
53.2 A

Top Speed
4000 rpm

Peak Current
239 A

Winding Resistance
0.12 ohm

Rated Power
3.9 kW

Rated Torque
15.3 Nm

Overload Capacity
High

Design
Maintenance free, brushless

Flange
DIN 42948 compliant

Protection
IP 65 standard

Continuous Stand-Stop Applications
Applicable

Temperature Monitoring
Yes

Service Life
Long

Frequently Asked Questions

What thermal behavior should be expected from MKD112C-058-GG3-AN under natural-convection cooling and Class-F insulation at 35.6 kW/400 V?

The forced airflow, enclosure temperature and mounting orientation materially affect permissible continuous torque. Its class-F materials tolerate higher winding temperatures but monitoring via the drive’s thermal model remains essential for lifetime.

How does the 70 Nm holding brake interact with the motor’s rated/standstill torques on MKD112C-058-GG3-AN for vertical axes?

The brake is sized for static holding, not for dynamic stopping, while the emergency-stop energy must be handled by the drive and mechanics. Its release current and response times (≈1.29 A, ~97 ms on 112C/058 variants) inform safe-torque-off timing.

What are the servo-tuning implications of the listed 7.63 kg·cm² rotor inertia for load matching and bandwidth?

The low rotor inertia supports higher control bandwidth but increases sensitivity to load-inertia ratio and coupling compliance. Its autoset with frequency-response checks and aims for conservative inertia ratios when compliant transmissions or variable loads are present.

How do the 192 mm flange and 130 mm centering diameter of the MKD112C-058-GG3-AN affect retrofits and IM B5 face mounting?

The DIN-aligned envelope simplifies replacement on legacy frames, its pilot accuracy governs concentricity and vibration to preserve bearing life and alignment.

Does the plain-shaft with seal on MKD112C-058-GG3-AN maintain IP65 when coupled, and what coupling choices are preferred?

The dimensioned sealed coupling and cover is used to preserve the listed IP65 ingress protection. Its backlash-free, torsionally stiff couplings are typically selected to preserve servo stiffness and positioning fidelity.

Common Misspellings

Internal Product Review

The Bosch Rexroth Indramat’s MKD112C-058-GG3-AN motor operates on a rated power of 35.6 kW from a 400 V supply source. It uses natural-convection cooling and it possess class-F insulation. This unit has a plain-shaft with seal, resolver-based relative feedback and 70 Nm brake to suit axes in machine tools and semiconductor handling. It offers 38 Nm standstill torque that aids in precise positioning and performance.

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.