maxon RE 50 Brushed DC Motors Review: Specs, Price and Applications
Updated: 4 days ago
maxon RE 50 is a graphite-brush DC motor family with an ironless rotor. It is a brushed motor, despite an incorrect brushless label in some supplier listings. Selection must account for winding, commutator service and the lifecycle status of the exact part number.
Quick Verdict
RE 50 can be useful when its brushed DC architecture and mechanical package fit an existing machine. For new development, check the precise part status before committing: the manufacturer marks the 24 V example 578296 as not recommended for new designs. Do not transfer that status automatically to every other RE 50 ordering code.
maxon RE 50 Brushed DC Motors at a Glance
Specification | Details |
Commutation | Graphite brushes; mechanically commutated DC motor |
Family size | 50 mm diameter; 200 W type-power designation |
Example identity | 578296, nominal 24 V |
Example nominal operating point | 405 mNm at 5,680 rpm; 10.8 A nominal current |
Example no-load speed | 5,950 rpm; distinct from nominal loaded speed |
Example mechanical speed limit | 9,500 rpm; not the nominal operating point |
Example lifecycle status | 578296 is NRND; manufacturer advises alternatives for new designs |
System scope | External compatible brushed-motor controller and any required feedback |
Design and Engineering Assessment
The first engineering correction is the motor type. A brushed motor uses its commutator to switch rotor current, while a brushless motor needs an electronic commutation scheme. That difference affects controller selection, wiring, electrical noise and service planning, so the supplier listing label cannot be treated as a harmless naming variation.
An ironless rotor can reduce cogging associated with a slotted iron armature, but complete-axis smoothness still depends on current control, commutation, bearings and the attached mechanics. Evaluate the required low-speed behavior with the actual load rather than deriving it solely from rotor construction.
Nominal, no-load and limiting speed describe different conditions. A motor that spins rapidly without load may not provide the required torque at that speed. Use the selected winding curve and thermal operating range to establish the application point.
The lifecycle notice is a purchasing constraint, not a statement that an installed motor has stopped functioning. An existing design may need controlled spares and a migration plan; a new design should compare a currently recommended alternative before absorbing the cost of qualification.
Controller, Current and Braking
Select a drive designed for the motor type and the required current and voltage. If the application needs controlled positioning, specify the feedback path and controller architecture separately; the bare motor does not establish closed-loop positioning performance.
Check startup and reversal demand without treating theoretical stall current as an acceptable operating command. Coordinate current limiting with the motor thermal duty, power supply and mechanism. Verify how the drive handles returned energy during deceleration.
Brush Service and Installation
Plan for the actual maintenance environment. Brush wear depends on duty and operating conditions, and should be considered alongside bearings, contamination and access. A motor buried behind other equipment can turn a routine service issue into substantial downtime.
Check shaft loading, coupling alignment and vibration in the installed mechanism. Low rotor inertia does not remove the bearing loads imposed by belts, gears or a misaligned coupling.
Replacement and Acceptance
Record the full part number and winding rather than only the RE 50 family name. A similar-looking replacement can have a different torque constant, current requirement and speed characteristic. Update the approved drive limits if an alternative is adopted.
Test the loaded cycle after thermal stabilization, including low-speed regulation, reversals and stopping. Maintain an acceptance baseline so that a lifecycle replacement is qualified against machine behavior rather than package dimensions alone.
Applications and Selection
Existing machine axes and battery-powered mechanisms where the selected brushed motor and its lifecycle and maintenance requirements are acceptable.
For maxon RE 50 Brushed DC Motors, define the actual machine duty before selecting an ordering configuration. Include the required operating point, available installation space, environment and control interfaces. The specification table describes the product or family; the surrounding machine determines which of those features matters for the intended job.
Price and Value
Price: Request a quote for the exact configuration. Compare the product, compatible control equipment, required mechanical parts, cabling and commissioning as one installed system. A component price alone does not represent the cost of a working automation axis.
Evaluate an alternative against the same duty and acceptance criteria. Match the continuous operating requirement first, then compare transient capability, feedback, mechanical fit and support. This avoids choosing between superficially similar products whose ratings describe different operating conditions.
As a configuration-specific manufacturer price example checked on 16 October 2026, maxon lists RE 50 part 578296 at EUR 614.40 per unit for quantities 1–4, excluding VAT and shipping. This is not an ATC selling offer or a price for every RE 50 winding; confirm current terms and the NRND selection with the supplier.
Pros and Cons
Advantages
Ironless rotor supports a low-inertia brushed motor architecture
Simple motor commutation can suit an appropriate DC-drive system
Exact manufacturer data and lifecycle status support informed legacy selection
Limitations
Brush commutation introduces maintenance and controller considerations
Identified 578296 example is not recommended for new designs
Family name does not define winding or continuous operating envelope
Who Should Consider maxon RE 50 Brushed DC Motors?
Consider maxon RE 50 Brushed DC Motors for existing machine axes and battery-powered mechanisms where the selected brushed motor and its lifecycle and maintenance requirements are acceptable. Establish the required operating point and installation interfaces before choosing the configuration, and use a representative loaded cycle as the acceptance basis.
maxon RE 50 Brushed DC Motors FAQ
Is RE 50 brushless?
No. The reviewed RE 50 family uses graphite brushes. A brushless label in a supplier listing is incorrect.
Does the motor include a servo drive?
No. Select a compatible external brushed DC controller and any required position feedback.
Does NRND mean the motor is unavailable?
No. The manufacturer describes NRND as available but not recommended for new projects. Verify the status of the exact ordering code.
Does one part number define every RE 50 winding?
No. Preserve the exact part and winding identity when comparing performance or replacing a motor.
Can no-load speed be used as the loaded design speed?
No. Use the selected torque-speed curve and thermal operating range at the required load.
What maintenance question matters?
Assess brush service, bearings, contamination and access under the actual duty. Do not infer a maintenance interval from the family name alone.
What is the price?
A dated, quantity-specific manufacturer example appears in the Price and Value section. Request current terms for the actual part, quantity and destination.
How should a replacement be qualified?
Compare torque constant, operating curve, current demand, feedback, mechanical interfaces and the loaded machine acceptance cycle.
Prices are indicative and may change. Confirm the final configuration, commercial terms and delivery schedule before ordering.
