Coreless DC motor
maxon DCX coreless DC motor
Configurable ironless-winding brushed DC motors with precious-metal or graphite brushes, ordered online in custom combinations with gearheads and encoders.
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Need maxon parts, a replacement or another suitable option? Send your part number or describe the application. We’ll review the requirement and help with product selection, sourcing, pricing and lead times.
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Key specifications
| Outer diameter | 6–35 mm |
|---|---|
| Continuous torque (max) | 0.138 Nm |
| Speed (max) | 18,000 rpm |
| Power (max) | 80 W |
| Voltage | 12-60 V (DCX 35) |
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
Notes on this data
DCX range 6-35 mm, 0.3-80 W, up to 138 mNm nominal, up to 18,000 rpm (programme page). DCX 35 L catalogue page shows '80/120 W' key data and 12,300 rpm max.
Specify Motion is not affiliated with maxon group (maxon motor ag). maxon and DCX are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Engineer support
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Our experienced engineers are on hand, ready to help with your project. Whether you need the maxon DCX itself, help sourcing it, or a modified or custom design built around your load, speed and space, tell us what the machine has to do and we'll come back with the right option.
- Help sourcing DCX and spares for installed machines
- Modified and custom designs when a catalogue part doesn't fit
- Complete axis: motor, drive, gearing and feedback matched together
Typical applications
What a coreless DC motor is
A coreless DC motor has a self-supporting rotor winding with no iron core, typically arranged as a skewed or rhombic basket that spins around a fixed magnet. Without iron in the rotor, there is no cogging, inertia is very low and inductance is small, giving fast acceleration, smooth low-speed running and high efficiency. Coreless designs exist in brushed form, with precious-metal or graphite commutation, and in brushless form. They are usually small, from a few millimetres to tens of millimetres across.
When engineers choose a coreless DC motor
Choose a coreless motor for compact, high-efficiency, highly dynamic drives such as medical devices, surgical tools, laboratory instruments, optics and robotics. Low inertia and no cogging suit smooth precise motion. The trade-offs are thermal capacity and cost: the light winding heats quickly under overload, and coreless motors cost more than iron-core brushed motors. For high continuous torque in a larger size, an iron-core or brushless motor may be more economical.
How to specify the maxon DCX
Send these with your enquiry and an engineer can confirm the right DCX variant or an equivalent:
- Diameter and length (mm)
- Supply voltage (V)
- Continuous and stall torque (mNm)
- Speed range (rpm)
- Commutation: precious metal, graphite or brushless
- Gearhead and encoder options
- Life and duty cycle
Common mistakes to avoid
- Overloading briefly and overheating the low thermal mass winding
- Choosing precious-metal brushes for high-current start-stop duty
- Ignoring gearhead efficiency and life
- Running without current limiting
maxon DCX: frequently asked questions
Can you help replace maxon DCX 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 Motion Control Products options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the maxon DCX?
Configurable ironless-winding brushed DC motors with precious-metal or graphite brushes, ordered online in custom combinations with gearheads and encoders. Published series figures include outer diameter 6 mm, outer diameter 35 mm, continuous torque 0.138 Nm, speed 18,000 rpm. It is made by maxon group (maxon motor ag); Specify Motion can help source it or propose an equivalent.
Who makes the maxon DCX?
The maxon DCX 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 DCX?
The published series minimum outer diameter is 6 mm. Individual models and sizes in the DCX 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 DCX?
We can assess suitable replacement options. Our engineers can review the original model and propose options for your load, speed and environment. An engineer confirms the fit against your application before recommending anything.
What are the advantages of a coreless DC motor?
With no iron in the rotor, coreless motors have no cogging, very low rotor inertia and low inductance. This gives smooth running, fast acceleration and high efficiency. They suit compact, battery-powered and precise applications. The trade-off is limited thermal mass, so overloads must be controlled.
Should I choose precious-metal or graphite brushes?
Precious-metal brushes give low friction and low electrical noise, which suits low current, continuous running and battery devices. Graphite brushes handle higher currents and frequent start-stop duty better. Choose by current level and duty cycle, or move to a brushless coreless design for longer life.
Further reading: How to select a dc motor · Servo and stepper motors
Other coreless dc motor series
Engineer support
Our engineers are ready to help with your project
Tell us about your project and how you use the maxon DCX: the load, speed, duty and environment. An experienced engineer will review it and reply, normally within one working day.
- Reviewed by an engineer, not an autoresponder
- Like-for-like and better-fit alternatives
- Standard, modified and custom options
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