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Product description

The Bosch Rexroth MDD071B-N-030-N2M-095GL0 is a permanent-magnet digital AC servo motor for dynamic feed, positioning and handling axes in established Indramat drive systems. This exact version carries material number R911249788 and belongs to frame size MDD071 with motor length B. Its rated speed is 3,000 min⁻¹. With natural convection, the Bosch Rexroth project planning manual specifies 4.4 Nm continuous standstill torque and 7.3 A continuous current; with surface cooling, 6.6 Nm is documented. The theoretical maximum torque is 13.6 Nm and the maximum current is 32.8 A. Further data for controller and axis sizing include a rotor moment of inertia of 8.9 × 10⁻⁴ kgm², a torque constant of 0.60 Nm/A, 1.60 Ω winding resistance and 9.4 mH winding inductance. The thermal time constant without surface cooling is 45 minutes; motor mass without holding brake and blower is 8.8 kg. The N2M feature identifies digital servo feedback with an integrated multiturn absolute encoder. This encoder supplies position and motor data to the matching digital drive controller and supports reproducible axis assignment after power-up. This version has a plain shaft and no holding brake. IP65 protection and insulation class F support operation in industrial machinery environments. The permissible ambient temperature range is 0 to +45 °C; −20 to +80 °C is specified for storage and transport. For replacement, the complete type code, material number, rated speed, feedback version, centering diameter, shaft, connector orientation and brake version must match the installed axis exactly. Similar MDD071B variants with a different speed, encoder, keyed shaft or holding brake are not automatically interchangeable. Precise matching reduces commissioning risks and supports targeted spare-parts supply for legacy Rexroth and Indramat machines.

Bosch Rexroth MDD071B-N-030-N2M-095GL0

Specifications

Manufacturer Bosch Rexroth
Product series MDD Digital AC Servo Motors
Manufacturer / order / identification number MDD071B-N-030-N2M-095GL0
Material number R911249788
Device type Permanent-magnet digital AC servo motor
Rated speed 3,000 min⁻¹
Continuous standstill torque 4.4 Nm with natural convection
Continuous standstill current 7.3 A with natural convection
Theoretical maximum torque 13.6 Nm
Maximum current 32.8 A
Rotor moment of inertia 8.9 × 10⁻⁴ kgm²
Torque constant at 20 °C 0.60 Nm/A
Winding resistance at 20 °C 1.60 Ω
Winding inductance 9.4 mH
Thermal time constant 45 min without surface cooling
Motor mass 8.8 kg without holding brake and blower
Degree of protection IP65
Feedback Digital servo feedback with integrated multiturn absolute encoder
Output shaft Plain shaft
Holding brake Without
Control cabinet with PLC modules and automation components
Machine downtime in a production environment

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FAQ

Frequently asked questions

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What are the ratings of the Bosch Rexroth MDD071B-N-030-N2M-095GL0?

At 3,000 min⁻¹, the naturally convected motor reaches 4.4 Nm continuous standstill torque and 7.3 A continuous current; 13.6 Nm theoretical maximum torque and 32.8 A maximum current are documented.

What must match when replacing the MDD071B-N-030-N2M-095GL0?

The complete type code, material number R911249788, rated speed, multiturn feedback, centering, shaft, connector orientation and the version without a holding brake must match the installed axis exactly.

Is there a guarantee?

Yes, we provide a 14-day functional guarantee for used items. This means the component must be operational when received.

Please note that the guarantee only applies when the warranty seal is undamaged.

If a defect occurs within 14 calendar days, please contact us in writing. Subject to availability, we will provide a replacement or refund the full purchase price after return.

Further details are provided in the terms and conditions supplied with your quotation.

How quickly do you dispatch and which shipping options are available?

We generally dispatch immediately - in many cases on the same working day. For particularly urgent requirements or machine downtime, we find a suitable solution as quickly as possible and provide a specific delivery window on request.

Express shipping or collection from our premises is also possible, depending on the situation. State your requirements during the ordering process or contact us directly.

We ship worldwide and work with reliable shipping partners, from parcel services to freight forwarding. Freight shipments normally require some preparation so the goods arrive safely and undamaged.

Which payment methods are available?

Payment is normally made by bank transfer against invoice. Payment is due within 10 calendar days of receiving the goods.

As a rule, we offer purchase on account for all customers. In individual cases, such as new customers or particularly high-value components, we may agree advance payment. This decision is made individually and communicated transparently.

Can we return items if they were ordered incorrectly?

Because we sell exclusively to business customers (B2B), there is no general right of return and no consumer right of withdrawal.

Please note that returns of functioning goods are generally excluded. In justified exceptional cases, we can assess an individual solution, but this is not the standard procedure.

Is there a discount when ordering several items?

For larger order quantities or several items of one type, we can offer individual discounts.

Simply send us a quick enquiry - we check availability and will gladly prepare a tailored quotation with quantity pricing.

Do you also purchase industrial spare parts?

Yes, we also purchase automation components, such as frequency inverters, PLC assemblies, panels, servo motors and CPUs. Components from Siemens, Lenze, Schneider Electric, Control Techniques or Heidenhain are especially sought after, and other brands are also possible.

The process is straightforward: email us an inventory list or overview photos at info@reha-industriekomponenten.de. We calculate a market-based purchase price and send you an offer.

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