22mm Coreless Gear Motor 6–24 V Compact DC Motor 6.24 mN·m | BDCB2225 BODENMOTION

Overview of BDCB2225 22mm Coreless Gear Motor

The BDCB2225 22mm coreless gear motor platform combines a Ø22 × 25 mm graphite brushed motor with relatively strong torque capability in a short mechanical package. Rated torque reaches 6.24 mN·m, while four winding versions cover 6V through 24V systems, giving OEM engineers room to balance available voltage, current demand, speed, and load requirements.
A planetary gearbox can be added when the mechanism requires lower output speed and higher transmitted torque, while photoelectric or magnetoelectric encoders are optional for projects requiring speed or position feedback. This allows the same motor platform to serve both simple two-wire brushed drives and more controlled actuator architectures without treating the encoder as a standard configuration.

Key Features of BDCB2225 22mm Coreless Gear Motor

• High Torque in a Short 22mm Frame – Rated torque reaches 6.24 mN·m within a Ø22 × 25 mm motor body, supporting compact mechanisms where axial installation space is restricted.
• 4–10W Motor Platform – Provides a useful middle-power range for compact actuators, automation modules, and geared motion systems.
• Four DC Winding Options – 6V, 12V, 18V, and 24V configurations allow the motor to be matched to different power architectures rather than forcing one voltage solution across all projects.
• Graphite Brush Construction – Suits applications where repeated operation and longer brush service requirements are more important than the ultra-low-current characteristics of precious-metal brush designs.
• Optional Encoder Feedback – Photoelectric or magnetoelectric encoders can be added when speed monitoring, closed-loop control, or position-related feedback is required.
• Planetary Gearbox Compatibility – An optional planetary gearbox converts the motor’s higher rotational speed into lower-speed, higher-torque actuator output.
• Strong Shaft Load Capacity – The bearing system supports up to 2 N dynamic axial load and 15 N radial load, giving the Ø22 mm platform useful mechanical robustness for compact transmissions.

Technical Specifications of BDCB2225 Compact DC Motor

The four suffixes represent separate winding designs. Their operating current, speed constant, torque constant, and resistance differ, so the correct model should be selected according to the complete power supply and load profile.

Motor Model	Unit	BDCB2225-01	BDCB2225-02	BDCB2225-03	BDCB2225-04
At Nominal
Nominal Voltage	V/DC	6	12	18	24
Nominal Speed	rpm	11,340	13,272	9,676	9,960
Nominal Current	A	0.98	0.81	0.50	0.34
Nominal Torque	mN·m	3.67	5.13	6.24	5.56
Free Load
No-load Speed	rpm	13,500	15,800	11,800	12,000
No-load Current	mA	100	90	60	45
At Max. Efficiency
Maximum Efficiency	%	75.1	74.0	71.4	70.9
Speed	rpm	11,880	13,825	10,207	10,380
Current	A	0.760	0.654	0.389	0.282
Torque	mN·m	2.8	4.0	4.7	4.4
At Max. Output Power
Maximum Output Power	W	8.1	13.3	10.7	10.3
Speed	rpm	6,750	7,900	5,900	6,000
Current	A	2.9	2.3	1.3	0.9
Torque	mN·m	11.5	16.0	17.3	16.3
At Stall
Stall Current	A	5.60	4.60	2.50	1.80
Stall Torque	mN·m	22.9	32.1	34.7	32.7
Motor Constants
Terminal Resistance	Ω	1.07	2.61	7.20	13.33
Terminal Inductance	mH	0.025	0.090	0.265	0.550
Torque Constant	mN·m/A	4.17	7.11	14.22	18.62
Speed Constant	rpm/V	2,250.0	1,316.7	655.6	500.0
Speed/Torque Constant	rpm/mN·m	588.9	492.7	340.2	367.2
Mechanical Time Constant	ms	18.07	15.12	10.44	11.27
Rotor Inertia	g·cm²	2.93	2.93	2.97	2.93
Number of Pole Pairs	—	1	1	1	1
Number of Phases	—	5	5	5	5
Weight	g	48	48	48	48
Typical Noise Level	dB	≤42	≤42	≤42	≤42

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

Motor Model Number Breakdown

Mechanical Design & Installation Notes for BDCB2225 Long-Life Graphite Brush Motor

The larger Ø22 mm frame gives the BDCB2225 more shaft-load capability than many smaller coreless motors, but correct alignment and transmission design remain important for controlling bearing load, vibration, and brush wear.

Higher Shaft Load Capacity
The sintered metal bearing supports a maximum dynamic axial load of 2 N and a maximum radial load of 15 N, measured 5 mm from the flange. These values should still be treated as motor-bearing limits rather than target continuous loads.

Bearing Clearance
Axial play is specified at 0–0.1 mm. Sintered metal bearing radial play is limited to 0.03 mm, while ball-bearing radial play is limited to 0.015 mm.

Gearbox Alignment
When a planetary gearbox is fitted, shaft concentricity and coupling alignment should be controlled carefully to avoid transferring additional radial or axial force back into the motor.

Encoder Integration
A photoelectric or magnetoelectric encoder is optional rather than part of the standard motor configuration. Encoder selection should be based on the required feedback resolution, controller interface, installation length, and environmental conditions.

Temperature Limits
The specified ambient temperature range is −20°C to +80°C, relative humidity should remain below 90% RH at 25°C, and rotor temperature should not exceed 125°C.

Load and Brush-Life Balance
Repeated high-current acceleration, frequent reversing, or extended operation close to the maximum-output region can increase brush and thermal stress. Actual duty cycle should therefore be validated in the complete actuator.

OEM Customization Options for BDCB2225 DC Motor with Optional Encoder

The BDCB2225 can be configured around the required power platform, mechanical transmission, and feedback architecture. Encoder and gearbox options should be selected only when the application needs them.

Customization Item	Available Options / Description
Winding Version	Standard 6V, 12V, 18V, or 24V configuration
Planetary Gearbox	Optional transmission for lower speed and higher output torque
Encoder Option	Photoelectric or magnetoelectric encoder available as an optional feedback component
Shaft Configuration	Shaft geometry and length can be reviewed for the transmission interface
Bearing Configuration	Bearing arrangement can be evaluated according to load and precision requirements
Wiring / Cable Length	Lead arrangement can be adapted according to the OEM installation
Connector Type	Connector selection can be reviewed for the controller interface
Mounting Interface	Mechanical adaptation can be evaluated for the final actuator structure
Prototype Configuration	Motor, gearbox, and encoder combination can be validated before production

Application Fields of BDCB2225 Compact DC Motor

The BDCB2225 is particularly useful where a compact brushed motor must provide enough torque for a mechanical transmission while leaving the option to add gearing or feedback when the application becomes more demanding.

• Compact Robotic Actuators – Combines with a gearbox and optional encoder for controlled rotary or linear motion modules.
• Industrial Automation Mechanisms – Drives indexing, adjustment, clamping, and small positioning assemblies.
• Valve and Damper Actuators – Supports geared opening and closing mechanisms requiring repeatable low-speed motion.
• Medical & Laboratory Equipment – Provides compact motion for sample handling, adjustment, and internal mechanical functions.
• Smart Equipment Drives – Fits embedded mechanisms where simple brushed control is preferred but encoder feedback may be added when needed.
• Precision Geared Modules – Offers a motor platform for applications requiring higher transmitted torque from a relatively short motor body.

Why Choose BODENMOTION for Your 22mm Coreless Gear Motor Project

For a geared brushed actuator, motor selection should start with the required output-side speed and torque, then work backward through gearbox ratio, transmission efficiency, motor current, and feedback requirements. This is especially important when an encoder is optional rather than built into every standard motor.

• Motor and Gearbox Ratio Matching – We help relate motor speed and torque to the required actuator output after considering transmission efficiency.
• Optional Encoder Selection – Photoelectric and magnetoelectric feedback can be evaluated according to speed sensing, position control, controller interface, and available installation space.
• Graphite Brush Duty-Cycle Review – Start-stop frequency, reversing, current peaks, and operating duration can be assessed against expected brush service requirements.
• Shaft and Load Evaluation – Radial load, axial load, coupling arrangement, and gearbox alignment are considered before final mechanical integration.
• Cost-Effective Alternative to Premium Brands – BODENMOTION provides a practical coreless motor and gearbox platform for OEM projects seeking flexible configuration without premium-brand sourcing costs.
• Prototype Configuration Validation – Motor-only, geared, or geared-with-encoder samples can be evaluated under the actual controller and load before volume production.

Customer Feedback

Germany | Automation Equipment Manufacturer
Application: compact valve actuator
Feedback: The Ø22 × 25 mm motor provided enough torque margin for the geared mechanism while keeping the actuator housing shorter than the previous drive platform.

Japan | Precision Equipment OEM
Application: positioning and adjustment module
Feedback: Adding encoder feedback to the geared configuration made it easier to monitor movement without changing the basic motor platform used during early prototype testing.

United States | Robotics Developer
Application: compact rotary actuator
Feedback: The graphite brushed motor and planetary gearbox combination provided the lower output speed required by the mechanism while maintaining a straightforward DC control architecture.

Downloads – Datasheet

[BDCB2225 22mm Coreless Graphite Brushed DC Motor Specification PDF]

FAQ – BDCB2225 22mm Coreless Motor

Q1: Is the encoder included with every BDCB2225 motor?

A1: No. The standard BDCB2225 is a brushed DC motor, while photoelectric and magnetoelectric encoders are optional components. The required feedback configuration should be specified when defining the final motor assembly.

Q2: When should the planetary gearbox be added?

A2: A gearbox is useful when the mechanism requires lower output speed and higher torque than the direct motor shaft can provide. Gear ratio selection should consider required actuator speed, load torque, gearbox efficiency, and startup margin.

Q3: Why does the 18V version have the highest rated torque but not the highest rated speed?

A3: Each voltage version uses a different winding. The 18V model is rated at 6.24 mN·m and 9,676 rpm, while the 12V version reaches 13,272 rpm with 5.13 mN·m rated torque. Selection therefore depends on the required operating point rather than choosing the version with the highest voltage.

Q4: Does BODENMOTION offer international shipping?

A4: Yes. Samples can normally be shipped by FedEx or DHL, while bulk orders can be arranged by air or sea according to order size and destination.

Q5: Is there a smaller graphite brushed alternative?

A5: Yes. The BDCB1740 uses a smaller Ø17 × 40 mm graphite brushed platform and provides rated torque up to 9.8 mN·m. It is worth considering when radial installation diameter is more restricted, although its longer motor body creates a different packaging tradeoff.

Contact BODENMOTION – 22mm Coreless Gear Motor and Encoder Solutions

For compact actuator projects requiring a brushed coreless motor, planetary transmission, or optional feedback, BODENMOTION supports configuration selection around the complete mechanical and control architecture.

What We Can Provide

• Motor and Gearbox Matching – Compare motor operating speed, gearbox ratio, efficiency, and required actuator torque.
• Optional Encoder Integration – Evaluate photoelectric or magnetoelectric feedback according to the controller and sensing requirements.
• Winding Selection – Match 6V, 12V, 18V, or 24V configurations to the available power supply and allowable current.
• Mechanical Load Review – Assess shaft loading, coupling alignment, gearbox mounting, and available installation space.
• Prototype Actuator Testing – Validate motor current, output speed, torque, temperature, and feedback behavior in the actual mechanism.
• OEM Production Support – Support samples, pilot builds, customized configurations, and stable long-term supply.

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