MDD090A-N-030-N2L-110GL2

MDD Synchronous Motors

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The MDD090A-N-030-N2L-110GL2 motor from Bosch Rexroth Indramat's MDD Synchronous Motors series offers precise digital servo feedback and a robust standard housing. It features standard balancing, a motor size of 090, a motor length code of A, and a nominal speed of 3000 min⁻¹. The motor includes a blocking brake with 11.0 Nm torque and provides 3.7 Nm continuous standby torque. Its centering diameter is 110 mm and it uses a plain shaft.

Technical Specifications

Balancing
Standard

Holding Brake
With blocking brake

Holding Brake Torque
11.0 Nm

Centering Diameter
110 mm

Housing
Standard

Motor Feedback
Digital servo feedback (DSF)

Continuous Torque at Standstill
3.7 Nm

Motor Length Code
A

Motor Size
090

Nominal Speed
3000 min⁻¹

Shaft Seal
With shaft seal

Shaft Type
Plain shaft

Connection Direction
Left

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What are the electrical-drive implications of using the Bosch Rexroth MDD090A-N-030-N2L-110GL2 motor in a closed-loop CNC axis?

Use a digital drive that supports high-resolution digital servo feedback (DSF) and ensure the drive’s current/torque limits match the motor’s continuous standstill torque for accurate low-speed holding and contouring; inadequate matching increases torque ripple and heat. Proper tuning (flux, inertia, and velocity loops) and a drive capable of the motor’s encoder resolution are essential for smooth CNC motion.

How does a plain shaft with a shaft seal affect coupling and maintenance choices in robotics and packaging machines?

A plain shaft simplifies direct-fit couplings (shrink disc, clamp hubs) but requires attention to axial positioning and sealing surfaces; the shaft seal reduces ingress but still needs correct sealing faces and lubricant/shaft-protection practices to avoid premature wear. Choose a coupling that accommodates the motor’s centering diameter and check runout tolerances during installation.

How should the 11.0 Nm blocking (holding) brake change my machine’s safety and homing strategy?

The strong holding brake can be used for safe-positioning and mechanical locking during power loss, reducing reliance on drive torque for static holds; however, coordinate brake control with the drive to avoid motor/gear backlash when engaging under load. Implement brake release timing and interlocks in the control sequence to prevent collisions during automatic homing.

What installation clearance and mounting checks matter given the 110 mm centering diameter?

The 110 mm centering diameter dictates hub and flange sizing — ensure your machine flange/housing provides matching concentric support and that bolt patterns are stress-relieved to avoid eccentric loading. Verify access for connector direction (left) and leave clearance for service and brake wiring.

Can I retrofit this MDD motor into an existing system originally designed for a keyed shaft motor?

Yes, but you must adapt the coupling interface (plain-shaft-to-keyway adapter or new hub) and confirm axial/runout limits; also confirm the drive’s encoder/feedback compatibility if the original system used a different encoder type. Mechanical adapters and re-tuning of motion loops are normally required for reliable performance.

Common Misspellings

Internal Product Review

The MDD090A-N-030-N2L-110GL2 motor by Bosch Rexroth is designed for use in CNC machines, robotics, and packaging equipment. It features a plain shaft with seal, digital servo feedback, and an 11.0 Nm holding brake. The motor delivers 3.7 Nm continuous torque at standstill and runs at 3000 min⁻¹ nominal speed.