MDD025A-N-100-N2G-040FF0
MDD Synchronous Motors
Technical Specifications
Balancing
Standard
Holding Brake
Without blocking brake
Centering Diameter
40 mm
Housing
Standard
Motor Feedback
Resolver feedback
Continuous Torque at Standstill
0.33 Nm
Motor Length Code
A
Motor Size
025
Nominal Speed
10000 min⁻¹
Shaft Seal
Without shaft seal
Shaft Type
Plain shaft
Connection Direction
Right
Connection Type
Connecting cable with coupling unit
Product Type
Motor for digital drive controllers
Shaft End
Standard (without side B shaft end)
Frequently Asked Questions
How does the standstill continuous torque (0.33 Nm) of this motor affect its ability to handle static loads or hold position in precision systems?
A continuous torque at zero speed lets the motor resist external forces without slipping even when stationary, so it can maintain position without drift under modest loads. But for heavier loads or vibration, additional mechanical locking/brakes or a higher torque safety margin are advisable.
Does the nominal speed of 10,000 min⁻¹ impose special cooling, bearing or lubrication requirements?
Yes — at 10,000 rpm, bearing quality, lubricant type, and shaft support are critical to avoid excessive wear or vibration; also thermal dissipation must be managed so windings and magnets do not overheat. Improper cooling can lead to demagnetization or reduced lifespan, especially under continuous high output.
How does motor size “025” and motor length code “A” affect dynamic response such as acceleration and inertia?
Generally, a smaller frame “025” and a short “A” length imply lower rotor inertia, allowing faster acceleration/deceleration and quicker response to control inputs. But it also limits maximum torque and heat dissipation capacity compared to larger motors.
What are the implications of having no holding brake (“without blocking brake”) when using this motor in vertical or safety-critical axes?
Without a brake, the motor must rely on its own torque to resist load when unpowered; vertical loads may lead to drift or drop if the drive is off. For safety or when holding load during power failure is needed, an external brake or mechanical locking is required.
How does resolver signal conversion (in this motor) influence overall loop latency and control bandwidth?
Resolver feedback requires a resolver-to-digital converter (RDC) which introduces some phase lag and limits bandwidth depending on conversion rate, excitation frequency, and signal filtering. For high bandwidth control loops (e.g. precision motion or vibration suppression), ensure the RDC and drive electronics are specified for sufficient response.
Common Misspellings
MDD-025A-N-100-N2G-040FF0
MDD025A N 100 N2G 040FF0
MDD025A-N-100-N2G-040-FF0
MDD025A-N-100-N2G-040-FFO
MDD025A-N-100-N2G-040FFO
MDD025AN100N2G040FF0
MDD25A-N-100-N2G-040FF0
MDDO25A-N-100-N2G-040FF0
MDDO25A-N-1OO-N2G-O4OFFO
Internal Product Review
The MDD025A-N-100-N2G-040FF0 motor from Bosch Rexroth delivers 0.33 Nm continuous torque at standstill and operates at a nominal speed of 10000 min⁻¹. It features resolver feedback, a plain shaft, and a standard housing with a 40 mm centering diameter. This motor is ideal for use in semiconductor equipment, medical automation, and precision laboratory systems.
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