Check the operating point together
Torque and speed must be considered at the same duty point. No-load speed is not the speed available at rated continuous torque.
10mm micro BLDC motor selection
Compare torque, speed, and supply voltage with a cited 10mm motor reference. Check cooling, drive, and package limits before committing to the design.
Compare a continuous operating point with the published maxon EC 10 reference winding at its nominal voltage. This is a screening estimate, not a rating for every 10mm motor.
Torque and speed must be considered at the same duty point. No-load speed is not the speed available at rated continuous torque.
The EC 10 example lists 39.8 K/W housing-to-ambient thermal resistance. Mounting, ambient temperature, and duty cycle affect the usable continuous load.
Published figures are tied to a voltage variant. Confirm the winding, controller, feedback, current limit, and startup behavior as one drive system.
These are manufacturer figures for one 10mm brushless motor family, not guaranteed limits for the whole 10mm size class. Use the voltage row matching the reference winding and confirm current availability and specifications before sourcing.
| Nominal voltage | No-load speed | Nominal speed | Max continuous torque | Speed/torque gradient |
|---|---|---|---|---|
| 6 V | 49,200 RPM | 41,700 RPM | 1.74 mNm | 4,180 RPM/mNm |
| 9 V | 52,500 RPM | 45,600 RPM | 1.63 mNm | 4,110 RPM/mNm |
| 12 V | 53,200 RPM | 46,600 RPM | 1.62 mNm | 3,940 RPM/mNm |
| 18 V | 57,100 RPM | 50,900 RPM | 1.61 mNm | 3,700 RPM/mNm |
Additional manufacturer limits for this EC 10 reference: 65,000 RPM maximum speed, 39.8 K/W housing-to-ambient thermal resistance, and 125°C maximum winding temperature. The catalog labels these values nominal and subject to change.
The selected voltage loads that EC 10 variant’s no-load speed, nominal speed, nominal continuous torque, and speed/torque gradient from the manufacturer catalog. The screening curve starts at the nominal speed and torque, extends using the published gradient, and is capped at the listed no-load speed.
The displayed mechanical output first converts the entered torque from mNm to N·m, then uses P [W] = T [N·m] × 2π × n [RPM] / 60. It is a calculated shaft-power value, not electrical input, efficiency, or proof that the motor can continuously dissipate the resulting losses.
A result within the reference curve is a first-pass comparison. It does not check the custom motor’s winding, phase current, cooling, bearing life, vibration, controller commutation, startup load, or mechanical drawing.
| Direction | Potential benefit | Verify before choosing |
|---|---|---|
| Larger motor envelope | More room for magnetic and thermal design | Actual continuous torque, added diameter, length, and mass |
| Add a gearhead | Trades output speed for higher output torque | Ratio, efficiency, length, backlash, noise, and output-shaft load |
| Change winding or drive | Can better match the available supply and speed target | Current, thermal limits, startup, feedback, and controller compatibility |
The voltage-variant figures and thermal limits above come from maxon’s EC 10 catalog sheet (March 2021 edition). The manufacturer marks the data as subject to change. Its current6V part listingsays that part can no longer be ordered. Reviewed on 6 October 2026. Confirm current availability and the exact configuration before making a purchase decision.
The checker uses the catalog’s nominal point and speed/torque gradient as a simplified screen. Public data for a single motor cannot establish the performance of an unspecified custom 10mm design; ask the intended supplier for its drawing, full operating curve, and thermal conditions.
No. It compares the requested operating point with one published maxon EC 10 reference winding. Other 10mm motors can use different magnetic designs, windings, bearings, thermal paths, and drive electronics. Ask the supplier to confirm the exact motor and installation.
No. Stall torque is a zero-speed condition and can demand high current. For continuous operation, use the manufacturer’s continuous torque or operating range for the selected voltage, cooling, and duty cycle.
Some specialized designs may differ, but the EC 10 reference used here lists a 65,000 RPM maximum speed and 49,200–57,100 RPM no-load speeds across its four voltage variants. Confirm maximum mechanical speed and bearing life on the exact motor datasheet.
The calculator does not extrapolate between reference windings. Send the actual supply voltage, controller limits, and operating point for supplier review; a different winding or drive may be required.
No. Check the complete drawing, including body length, flange, shaft, cable exit, connector, mounting features, runout, and any gearbox. Reserve tolerance for the housing and assembly process.
Include the available diameter and length, shaft and mounting drawing, supply and controller, torque-speed duty points, start-stop or stall events, ambient temperature, cooling and mounting material, lifetime target, quantity, and any noise or feedback requirements.
Send the operating point and package limits with your duty cycle, cooling conditions, and controller details. Engineering can review the actual motor configuration and identify missing data.
Inquiry Email
Include torque, RPM, voltage, duty cycle, ambient, mounting, drawing, and quantity.
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