DC servo motor
maxon EC flat / ECX FLAT DC servo motor
Short outer-rotor brushless pancake motors for tight axial spaces, including ECX FLAT versions with integrated electronics.
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Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Outer diameter | 22–90 mm |
|---|---|
| Continuous torque (max) | 0.464 Nm |
| Speed (max) | 6,000 rpm |
| Voltage | 12-60 V windings |
Summarised in our own words from maxon group (maxon motor ag)'s published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2 · Source 3
Notes on this data
2026/27 catalogue lists EC 60 flat, EC 90 flat and ECX FLAT 22/32/42 (with and without IE). EC 60 flat 100 W, ~301 mNm, 6,000 rpm; EC 90 flat page read shows 160 W, ~464 mNm nominal, 5,000 rpm. Conflict: other maxon listings describe an EC 90 flat at 600 W, so power_W_max left out. Table text garbled in source.
Specify Motion is not affiliated with maxon group (maxon motor ag). maxon and EC flat / ECX FLAT are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
maxon EC flat / ECX FLAT replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original maxon part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
Leadshine low-voltage PMSM servo motors from a 25 mm 33 W unit up to a 130 mm 2 kW unit, wound for 24-60 V DC buses. Fully published data covers torque to 6.4 Nm rated / 16 Nm peak, 17-bit absolute or 2500 ppr incremental encoders and IP65. Designed for ELD2, 2ELD2 and ELD3 drives.
| Published maximum | EC flat / ECX FLAT | ELVM Series Low-Voltage DC Servo Motors |
|---|---|---|
| Rated torque | — | 6.4 Nm |
| Peak torque | — | 16 Nm |
| Speed | 6,000 rpm | 6,000 rpm meets or exceeds |
| Power | — | 2,000 W |
Kinco's current-generation AC servo motor line, matched to the JD2 and FD5P PRO drives. Small-inertia 40-80 mm frames run at 3000 rpm on 220 V; large-inertia 130 and 180 mm frames are 1500 rpm machines reaching 47.8 Nm rated and 7.5 kW, with 23-bit multi-turn absolute encoders as standard.
| Published maximum | EC flat / ECX FLAT | SMK Series AC Servo Motors (SMK40S/60S… |
|---|---|---|
| Rated torque | — | 47.8 Nm |
| Peak torque | — | 119.5 Nm |
| Speed | 6,000 rpm | 6,000 rpm meets or exceeds |
| Power | — | 7,500 W |
Low-voltage (24-48 VDC) brushless servo motors with a 12-slot/10-pole low-cogging design, IP65 and a choice of optical or magnetic, incremental or absolute encoders. Matched to Kinco FD1 and OD drives for battery-powered and mobile machines.
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Typical applications
What a DC servo motor is
A DC servo motor, in current usage, is usually a low-voltage brushless permanent-magnet motor designed to run from a DC bus, typically 24 to 96 V, under closed-loop servo control. Electronically it works like an AC servo, with a three-phase stator commutated by the drive and encoder or Hall feedback on the shaft. The lower voltage means higher current for the same power, but suits battery-powered and safety-extra-low-voltage machines. Small precision brushless servomotors also fall into this group.
When engineers choose a DC servo motor
Choose a low-voltage DC servo for mobile robots, AGVs, battery equipment, medical devices and compact machines where mains voltage is impractical or unsafe. It allows simple power distribution and safe access. The trade-offs are current and power range: high current means thicker cables and higher losses, so power is typically limited to a few kilowatts. For mains-powered machines above that, an AC servo is usually simpler.
How to specify the maxon EC flat / ECX FLAT
Send these with your enquiry and an engineer can confirm the right EC flat / ECX FLAT variant or an equivalent:
- Bus voltage (V DC) and battery range
- Continuous and peak torque (Nm)
- Rated and maximum speed (rpm)
- Continuous and peak current (A)
- Feedback type and resolution
- Brake, IP code and frame size (mm)
- Drive and network interface
Common mistakes to avoid
- Sizing at nominal battery voltage without checking the low-charge end
- Undersizing cables for the higher current
- Ignoring regenerative energy into a battery or supply
- Mixing motor and drive feedback types that are not compatible
maxon EC flat / ECX FLAT: frequently asked questions
Can you help replace maxon EC flat / ECX FLAT or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the maxon EC flat / ECX FLAT?
Short outer-rotor brushless pancake motors for tight axial spaces, including ECX FLAT versions with integrated electronics. Published series figures include outer diameter 22 mm, outer diameter 90 mm, continuous torque 0.464 Nm, speed 6,000 rpm. It is made by maxon group (maxon motor ag); Specify Motion can help source it or propose an equivalent.
Who makes the maxon EC flat / ECX FLAT?
The maxon EC flat / ECX FLAT is made by maxon (maxon group (maxon motor ag)) and is listed here for engineers comparing options. Specify Motion is not affiliated with maxon group (maxon motor ag); brand names are used only to identify the product.
What is the outer diameter of the maxon EC flat / ECX FLAT?
The published series minimum outer diameter is 22 mm. Individual models and sizes in the EC flat / ECX FLAT range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the maxon EC flat / ECX FLAT?
We can assess suitable replacement options. On published figures, Leadshine ELVM Series Low-Voltage DC Servo Motors and Kinco SMK Series AC Servo Motors (SMK40S/60S/80S, SMK130G, SMK180G) are options to assess from our supply network. An engineer confirms the fit against your application before recommending anything.
What is the difference between an AC servo and a DC servo motor?
Both are typically brushless permanent-magnet motors under closed-loop control. The main difference is the supply: AC servos are wound for drives fed from mains voltage, while DC servos are wound for low-voltage DC buses. DC servos suit battery and low-voltage machines; AC servos suit higher-power mains machines.
How does battery voltage affect a DC servo motor?
Motor speed is roughly proportional to available voltage, so as a battery discharges the top speed falls. Size the motor at the lowest working battery voltage. Also allow for regenerative energy during braking, which raises bus voltage and must be absorbed by the battery or a braking circuit.
Further reading: How to select a servo motor · How to select a dc motor · Servo and stepper motors
Other dc servo motor series
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Tell us how you use the maxon EC flat / ECX FLAT: the load, speed, duty and environment. Our engineers will confirm whether it is still the right part, find it for you, or propose an alternative that fits better.
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From enquiry to delivery
Send a part number or describe the application. Our engineers take it from there: the right product, a clear quotation, and delivery and support arranged.
- 01Tell us what you needSend a part number, or configure the application, quantities and timing.
- 02An engineer reviews itWe check the specification and find the original part, a checked equivalent or a complete axis.
- 03Receive your quotationProducts, pricing, lead time and compatibility notes in one reply.
- 04Order and deliveryWhen you are happy, the order is placed and delivery and after-sales support are arranged.