Coreless Mini Motor Ø16×18 mm Micro Brushless DC Motor 1–2 W | BDCL1618 BODENMOTION

Overview of BDCL1618 Coreless Mini Motor

The BDCL1618 coreless mini motor is built around an unusually short Ø16 × 18 mm body, making axial space the defining consideration for this platform. At only 18 g, the motor provides a compact brushless drive option for embedded mechanisms where a larger or longer BLDC motor would complicate the mechanical layout.
Four winding versions support 9V, 12V, 18V, and 24V, with rated speeds from 8,624 to 11,935 rpm and rated torque from 0.90 to 1.13 mN·m. The platform also supports sensorless or Hall-sensored wiring, while a magnetoelectric encoder is available as an optional component when additional motion feedback is required.

Key Features of BDCL1618 Ultra-Compact Coreless Motor

• Ultra-Short Ø16 × 18 mm Body – The short axial envelope helps fit the motor into compact mechanisms where motor length is more restrictive than diameter.
• Low Rotor Inertia – Rotor inertia of only 0.11 g·cm² supports fast acceleration and responsive changes in rotational speed.
• Four Voltage Configurations – 9V, 12V, 18V, and 24V windings allow the same mechanical platform to be matched to different OEM power architectures.
• Up to 11,935 rpm Rated Speed – Provides moderate high-speed capability for miniature rotating, positioning, and airflow-related mechanisms.
• Brushless Commutation – Eliminates mechanical brush wear and supports longer operating life compared with brushed coreless motor platforms.
• Sensorless or Hall-Sensored Control – The motor can be configured with a basic three-phase interface or Hall feedback depending on startup and control requirements.
• Optional Magnetoelectric Encoder – Encoder feedback can be added when the application requires additional speed or position information; it is not part of the standard motor configuration.
• Planetary Gearbox Option – A gearbox can be added where lower output speed and higher transmitted torque are required.

Technical Specifications of BDCL1618 Micro Brushless DC Motor

Each suffix represents a different winding configuration. The selected voltage should be matched with the available driver, allowable current, target speed, and real mechanical load rather than treated as an interchangeable supply setting.

Motor Model	Unit	BDCL1618-01	BDCL1618-02	BDCL1618-03	BDCL1618-04
At Nominal
Nominal Voltage	V/DC	9	12	18	24
Nominal Speed	rpm	11,550	8,624	11,935	11,165
Nominal Current	A	0.28	0.12	0.14	0.10
Nominal Torque	mN·m	1.11	0.90	1.13	1.10
Free Load
No-load Speed	rpm	15,000	11,200	15,500	14,500
No-load Current	mA	70	30	30	25
At Max. Efficiency
Maximum Efficiency	%	53.7	54.6	57.0	53.7
Speed	rpm	11,850	8,904	12,478	11,455
Current	A	0.261	0.114	0.122	0.093
Torque	mN·m	1.00	0.80	0.96	1.00
At Max. Output Power
Maximum Output Power	W	1.9	1.1	2.0	1.8
Speed	rpm	7,500	5,600	7,750	7,250
Current	A	0.5	0.2	0.3	0.2
Torque	mN·m	2.40	1.95	2.45	2.38
At Stall
Stall Current	A	0.98	0.44	0.50	0.35
Stall Torque	mN·m	4.80	3.91	4.90	4.77
Motor Constants
Terminal Resistance	Ω	9.18	27.27	36.00	68.57
Terminal Inductance	mH	0.019	0.045	0.076	0.145
Torque Constant	mN·m/A	5.32	9.53	10.42	14.68
Speed Constant	rpm/V	1,666.7	933.3	861.1	604.2
Speed/Torque Constant	rpm/mN·m	3,098	2,865	3,164	3,040
Mechanical Time Constant	ms	3.67	3.40	3.75	3.60
Rotor Inertia	g·cm²	0.11	0.11	0.11	0.11
Number of Pole Pairs	—	1	1	1	1
Number of Phases	—	3	3	3	3
Weight	g	18	18	18	18
Typical Noise Level	dB	≤50	≤50	≤50	≤50

Not sure how to interpret model differences? See the model code breakdown below ↓

Motor Model Number Breakdown

Mechanical Design & Installation Notes for BDCL1618 Coreless Mini Motor

The short motor body reduces installation length, but the complete rotating assembly still needs accurate alignment and controlled shaft loading to preserve bearing performance and operating stability.

Shaft Load Limits
Maximum dynamic axial load is 0.8 N, while maximum radial load is 8 N when measured 5 mm from the flange. Driven components should be positioned to avoid unnecessary overhung loading.

Bearing Selection
Both ball-bearing and sleeve-bearing options are available. Bearing choice can be evaluated around radial loading, operating speed, acoustic target, expected duty cycle, and project cost.

Mechanical Clearance
Axial play is specified at 0.05–0.15 mm, and radial play is limited to 0.015 mm. Coupling alignment and shaft concentricity should be controlled during assembly.

Press-Fit Protection
The maximum static press-fit force is 10 N. Assembly force should not be transferred improperly through the output shaft or bearing structure.

Thermal Environment
The motor is specified for ambient temperatures from −20°C to +80°C, with relative humidity below 90% RH at 25°C and a maximum rotor temperature of 85°C.

Controller Integration
The motor is three-phase brushless and therefore requires a compatible electronic driver. Startup behavior, phase current, current limiting, and feedback configuration should be checked with the actual mechanical load.

OEM Customization Options for BDCL1618 Brushless Motor with Optional Encoder

The BDCL1618 can be configured around the available controller, required feedback method, installation space, and final transmission design.

Customization Item	Available Options / Description
Winding Version	Standard 9V, 12V, 18V, or 24V configuration
Feedback Configuration	Sensorless or Hall-sensored motor configuration
Encoder Option	Optional magnetoelectric encoder for additional motion feedback
Bearing Type	Ball bearing or sleeve bearing
Planetary Gearbox	Optional gearbox for reduced speed and increased output torque
Cable Length	Lead length can be adapted to the equipment layout
Connector Type	Connector can be reviewed according to the controller interface
Pinout	Cable, connector, and pin sequence can be customized
Shaft Interface	Shaft requirements can be reviewed for the driven mechanism
Prototype Configuration	Motor, sensor, encoder, or gearbox combination can be validated before production

For Hall-sensored configurations, the Hall supply range is 3.5–25 VDC. The standard sensorless interface uses three motor phases, while the Hall version adds Hall A, B, C, supply, and ground connections.

Application Fields of BDCL1618 Micro Brushless DC Motor

The BDCL1618 is most useful when short motor length and low moving mass are more important than maximum torque or power.

• Miniature Positioning Modules – Provides compact rotary motion for embedded adjustment and positioning mechanisms.
• Portable Instruments – Fits lightweight internal drives where enclosure depth is tightly controlled.
• Optical & Inspection Equipment – Supports small scanning, adjustment, and focusing mechanisms requiring responsive motion.
• Micro Pump and Airflow Modules – Drives compact impellers and rotating pump components with moderate power demand.
• Compact Automation Devices – Powers indexing, adjustment, and internal motion functions in small electromechanical assemblies.
• Encoder-Based Motion Modules – Can be paired with the optional magnetoelectric encoder when additional speed or position feedback is required.

Final configuration should be selected according to available space, driver architecture, load inertia, target speed, operating time, and feedback requirements.

Why Choose BODENMOTION for Your Ultra-Compact Brushless Motor Project

In an 18 mm-long motor platform, packaging decisions can become just as important as electrical performance. Driver location, cable routing, bearing choice, feedback hardware, and gearbox length can significantly change the final assembly dimensions.

• Axial Space Evaluation – We help determine whether the Ø16 × 18 mm motor platform leaves enough room for the coupling, sensor, encoder, or gearbox required by the complete system.
• Sensorless vs Hall Selection – Startup load, minimum operating speed, wiring complexity, and controller architecture can be reviewed before selecting the feedback configuration.
• Optional Encoder Integration – Encoder feedback is added only when the application benefits from additional speed or position information, avoiding unnecessary hardware in simpler systems.
• Low-Inertia Drive Matching – Motor response, load inertia, acceleration requirements, and controller current settings can be evaluated together.
• Cost-Effective Alternative to Premium Brands – BODENMOTION provides an adaptable miniature brushless motor platform for OEM projects requiring compact dimensions and flexible configuration.
• Prototype Configuration Validation – Different winding, bearing, sensor, encoder, and gearbox combinations can be evaluated before final production approval.

Customer Feedback

Germany | Optical Equipment Manufacturer
Application: compact adjustment module
Feedback: The 18 mm motor length reduced the depth of the motion assembly while maintaining the speed required for repeated adjustment cycles.

Japan | Portable Instrument OEM
Application: miniature internal drive
Feedback: The low motor weight and short body simplified the mechanical layout in a handheld device where internal space was tightly constrained.

United States | Automation Module Developer
Application: encoder-assisted positioning mechanism
Feedback: The optional feedback configuration allowed additional motion monitoring while retaining the same compact brushless motor platform for the actuator design.

Downloads – Datasheet

[BDCL1618 Coreless Mini Brushless DC Motor Specification PDF]

FAQ – BDCL1618 Coreless Mini Motor

Q1: Is the magnetoelectric encoder included with the standard BDCL1618?

A1: No. The magnetoelectric encoder is an optional component. The required encoder configuration should be specified when defining the final motor assembly.

Q2: What is the difference between the Hall-sensored version and adding an encoder?

A2: Hall sensors provide rotor-position information primarily for brushless commutation and startup control, while an encoder can provide additional motion feedback for applications requiring more detailed speed or position information. The two should therefore be selected according to different control requirements.

Q3: Why does the 18V version have the highest rated speed and torque?

A3: Each voltage version uses a different winding design. The 18V version is rated at 11,935 rpm and 1.13 mN·m, while the other windings provide different combinations of voltage, current, speed, and torque. The correct version depends on the complete system operating point.

Q4: What payment methods does BODENMOTION accept?

A4: BODENMOTION supports PayPal, credit card, and T/T. Final payment arrangements can be confirmed according to order quantity, customization requirements, and project stage.

Q5: Is there a higher-power coreless brushless alternative?

A5: Yes. The BDCL1525 uses a Ø15 × 25 mm body and belongs to the 25–65W power class, with rated speeds reaching 60,450 rpm. It is more suitable where considerably higher speed and output power are required and the additional axial length can be accommodated.

Contact BODENMOTION – Micro Brushless DC Motor Integration

For OEM projects where motor length, controller architecture, and feedback options all compete for limited installation space, BODENMOTION can support selection from the complete mechanism rather than treating the motor as an isolated component.

What We Can Provide

• Compact Packaging Review – Evaluate motor length, coupling, wiring, controller, encoder, and gearbox space together.
• Winding Selection – Compare 9V, 12V, 18V, and 24V versions according to available voltage, current, speed, and torque.
• Feedback Architecture Matching – Review sensorless, Hall-sensored, and optional encoder configurations according to control requirements.
• Bearing and Shaft Integration – Assess bearing type, shaft loading, alignment, and driven-component interface.
• Prototype Motion Testing – Validate startup, current, speed, temperature, feedback behavior, and load response in the actual assembly.
• OEM Production Support – Support samples, pilot builds, customized configurations, and stable long-term production.

📧 Email: info@bodenmotion.com
🌐 Website: https://bodenmotion.com