MDD021A-N-100-N2G-032FB0

MDD Synchronous Motors

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1 Year Warranty Included
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The MDD021A-N-100-N2G-032FB0 is a plain shaft motor with a centering diameter of 32 mm. Manufactured by Bosch Rexroth Indramat as part of the MDD Synchronous Motors series, the motor features resolver feedback. It delivers 0.15 Nm continuous torque at standstill and uses a connector side B connection.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

Centering Diameter
32 mm

Housing
Standard

Motor Feedback
Resolver feedback

Continuous Torque at Standstill
0.15 Nm

Motor Length Code
A

Motor Size
021

Nominal Speed
10000 min⁻¹

Shaft Seal
Without shaft seal

Shaft Type
Plain shaft

Connection Direction
Side B

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What does the “32 mm centering diameter” affect in mounting and coupling performance?

A 32 mm centering diameter means mating components—flanges or couplings—must precisely match to avoid misalignment; small diameter helps reduce moment of inertia at the connection, improving responsiveness. Poor fit or imbalance here increases vibration, reduces bearing life, and can degrade system accuracy.

How does resolver feedback impact control precision and what are its maintenance implications?

Resolver feedback offers absolute position information with high immunity to dust, oil, or electrical noise, making it reliable for harsh environments; however, it generally has lower resolution and slower responsiveness compared to high-end optical encoders. Regular calibration of the resolver’s excitation signal and checking sinusoidal signal integrity are needed to maintain accuracy.

What are the thermal management considerations for the MDD021A-N-100-N2G-032FB0 during continuous high-speed operation?

With high RPM (10,000 min⁻¹), losses (especially windage, friction, copper heating) increase, so ensuring good cooling (air circulation or mounting in ventilated housing) is essential to avoid overheating. Also, accurate current limiting and thermal protection in the drive controller are needed to prevent damage during sustained high load.

What are the implications of having a “plain shaft” without a shaft seal?

A plain shaft means simpler design and lower cost, but without a seal the shaft end is exposed to dust, moisture, or contaminants; this demands protective measures in the environment or external seals. Lack of shaft seal also means potential for shaft wear or corrosion unless materials and lubrication are compatible.

In robotics or automation applications, how does the motor’s torque-to-inertia ratio affect dynamic response?

A motor with lower rotor inertia relative to its torque can accelerate/decelerate quickly; given 0.15 Nm standstill torque and compact size, this motor likely has a favorable torque-to-inertia ratio for lighter loads. However, when driving larger cams or inertia loads, the motor may struggle to maintain trajectory unless assisted by gearing or mechanical reduction.

Common Misspellings

Internal Product Review

The Bosch Rexroth Indramat MDD021A-N-100-N2G-032FB0 motor offers a nominal speed of 10,000 min⁻¹ and continuous torque of 0.15 Nm. It comes with resolver feedback and a plain shaft, without a shaft seal. This motor is ideal for use in robotics, automation, and industrial machinery applications.