Low Noise Coreless Precious Metal Brushed DC Motor Φ13×20mm BDCM1320 BODENMOTION

Overview of BDCM1320 Coreless Precious Metal Brushed DC Motor

The BDCM1320 coreless precious metal brushed DC motor is designed for OEM applications requiring compact dimensions, low noise operation, and smooth motion response. With a Φ13 × 20 mm body and a lightweight 13 g structure, it provides a balanced drive solution for portable equipment, precision instruments, and miniature electromechanical systems where installation space is limited.

Supporting 3.7V, 6V, 12V, and 24V configurations, the BDCM1320 delivers rated speeds from 7600 to 10400 rpm with rated torque from 0.9 to 1.5 mN·m. Its precious metal brush system enables smooth operation, low electrical noise, and reliable startup performance, making it suitable for lightweight motion systems and compact OEM drive assemblies.

Key Features of BDCM1320 Compact Coreless Motor

• Coreless Rotor Design – Reduces rotor inertia and improves acceleration response in miniature motion systems.
• Precious Metal Brush System – Supports smooth operation, low electrical noise, and stable performance in low-current applications.
• Compact Φ13 × 20 mm Structure – Provides a small installation footprint for space-constrained OEM equipment.
• Lightweight Construction – Only 13 g, helping reduce overall system weight in portable applications.
• Wide Voltage Compatibility – Available in 3.7V, 6V, 12V, and 24V configurations for different OEM power platforms.
• Low Noise Operation (≤38 dB) – Suitable for applications where acoustic performance is an important design factor.
• Optional Planetary Gearbox – Available for applications requiring increased output torque and lower operating speed.

Technical Specifications of BDCM1320 Coreless Precious Metal Brushed DC Motor

All values are nominal. Actual performance may vary depending on load, duty cycle, driver settings, and operating environment.

Motor Model	Unit	BDCM1320-01	BDCM1320-02	BDCM1320-03	BDCM1320-04
At Nominal
Nominal Voltage	V/DC	3.7	6	12	24
Nominal Speed	rpm	7600	8500	9500	10400
Nominal Current	A	0.45	0.35	0.18	0.10
Nominal Torque	mN·m	0.9	1.0	1.2	1.5
Free Load
No-load Speed	rpm	9500	10500	11500	13000
No-load Current	mA	35	25	15	10
At Max. Efficiency
Max. Efficiency	%	65.2	67.8	69.5	71.1
Speed	rpm	7200	8050	9000	9800
Current	A	0.35	0.28	0.14	0.08
Torque	mN·m	0.7	0.8	0.9	1.0
At Max. Output Power
Max. Output Power	W	1.2	1.4	1.6	1.9
Speed	rpm	4500	5000	5600	6200
Current	A	0.9	0.7	0.45	0.30
Torque	mN·m	2.5	2.7	2.8	2.9
At Stall
Stall Current	A	1.8	1.5	0.9	0.6
Stall Torque	mN·m	4.8	5.2	5.5	5.8
Motor Constants
Terminal Resistance	Ω	2.06	3.20	13.30	40.00
Terminal Inductance	mH	0.15	0.25	0.50	0.90
Torque Constant	mN·m/A	2.67	3.47	6.11	9.67
Speed Constant	rpm/V	2568	1750	958	542
Speed/Torque Constant	rpm/mN·m	1583	1635	1727	1793
Mechanical Time Constant	ms	5.2	5.0	4.8	4.5
Rotor Inertia	g·cm²	0.18	0.18	0.18	0.18
Number of Pole Pairs	—	1	1	1	1
Number of Phases	—	5	5	5	5
Weight	g	13	13	13	13
Typical Noise Level	dB	≤38	≤38	≤38	≤38

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

Motor Model Number Breakdown

Mechanical Design & Installation Notes

Proper installation helps maintain stable operation, reduce vibration, and maximize service life during OEM integration.

Compact Mechanical Structure
The BDCM1320 features a Φ13 × 20 mm cylindrical housing, providing a compact footprint for applications where radial and axial space are limited.

Bearing & Shaft Protection
Axial play is 0.05–0.15 mm, and radial play is ≤0.012 mm. Proper shaft alignment, controlled press-fit force, and suitable mechanical loading help reduce bearing stress and maintain stable operation.

Operating Environment
The recommended ambient temperature range is -20°C to +80°C, with relative humidity below 90% RH (25°C). Maximum rotor temperature should not exceed 85°C.

Optional Gearbox Integration
A planetary gearbox option is available for applications requiring lower output speed and higher torque transmission.

OEM Customization Options – BDCM1320 Miniature DC Motor

Customizable parameters are available to support OEM integration and application-specific performance requirements.

Customization Item	Available Options / Description
Voltage	Configurable according to system requirements
Speed Curve	Optimized for different load characteristics
Shaft Type	Straight shaft, D-cut shaft, or custom-machined shaft
Shaft Length	Customized according to installation requirements
Gearbox Option	Optional planetary gearbox
Wiring / Cable Length	Custom lead wire length and routing
Connector Type	Bare wire, JST, Molex, or customized connectors
Mounting Interface	Mechanical adaptation for OEM assemblies
Brush Configuration	Precious metal brush system optimized for low-noise operation
Output Terminal	Customized electrical connection solutions

Application Fields of BDCM1320 Low-Noise Coreless Motor

From an OEM perspective, the BDCM1320 is suitable for compact systems requiring lightweight construction, smooth operation, and low acoustic performance.

• Portable Medical Devices – Compact motion modules for handheld and battery-powered equipment.
• Precision Instruments – Smooth drive solutions for measurement and adjustment mechanisms.
• Laboratory Equipment – Reliable motion control in compact analytical systems.
• Smart Electronic Devices – Internal drive applications where size and noise are critical.
• Optical & Precision Equipment – Lightweight motor solutions for miniature positioning systems.

Why Choose BODENMOTION for Your Compact Coreless Motor Project

For compact OEM systems, selecting a motor requires balancing size, noise, startup behavior, and long-term reliability. BODENMOTION helps customers evaluate these factors based on actual application requirements.

• Low-Noise Application Evaluation – We help review mechanical structure, load conditions, and installation factors to maintain smooth and quiet operation.
• Compact System Matching – Motor size, voltage, speed, and torque are evaluated together to support space-limited designs.
• Cost-Effective Alternative to Premium Brands – We provide practical replacement options for internationally recognized micro motor platforms while helping reduce procurement and project costs.
• Mechanical Integration Support – Shafts, wiring, connectors, gearbox options, and mounting interfaces can be adapted for OEM assemblies.
• Prototype Validation Support – Samples can be evaluated during early development to confirm motor performance before mass production.
• Stable OEM Supply Capability – Consistent manufacturing supports reliable transition from prototype testing to long-term production.

Customer Feedback

Germany | Precision Instrument Manufacturer
Application: compact adjustment module
Feedback: Low noise operation and stable speed performance improved integration into a sensitive instrument.

Japan | Portable Equipment OEM
Application: handheld device
Feedback: Lightweight structure and smooth startup characteristics supported compact product design.

United States | Medical Equipment Developer
Application: miniature drive system
Feedback: The small footprint helped reduce overall equipment size during prototype development.

Downloads – Datasheet

[BDCM1320 Coreless Precious Metal Brushed DC Motor Specification PDF]

FAQ – BDCM1320 OEM Micro Motors

Q1: Why is the motor noise higher after being installed into the equipment?

A1: Motor noise can be affected by mechanical resonance, shaft alignment, mounting structure, and load conditions. Proper installation and vibration control are important for maintaining low-noise operation.

Q2: Is this motor suitable for battery-powered applications?

A2: Yes. The BDCM1320 supports a 3.7V configuration, making it suitable for compact battery-powered equipment where low voltage operation and lightweight design are required.

Q3: Why choose the BDCM1320 instead of a smaller coreless motor?

A3: The BDCM1320 provides a larger Φ13 structure and additional output capability while maintaining a compact size, making it suitable for applications requiring more performance margin without moving to a larger motor platform.

Q4: What is the warranty period for BODENMOTION motors?

A4: BODENMOTION provides a 1-year warranty for product quality issues under normal operating conditions. Damage caused by improper installation, misuse, or operation outside recommended conditions is not covered.

Q5: Is there a higher output alternative available?

A5: Yes. The BDCM1230 is recommended for applications requiring higher output capability. Compared with the BDCM1320, it provides increased power and torque while maintaining a compact coreless precious metal brushed motor structure.

Contact BODENMOTION – OEM Coreless Precious Metal Motor Solutions

If you are developing portable devices, precision instruments, compact automation equipment, or miniature motion systems, BODENMOTION provides engineering support from motor selection through OEM customization and long-term production.

What We Can Provide

• Application-Based Motor Selection – Recommend suitable motor configurations based on speed, torque, voltage, load, and installation requirements.
• Coreless Motor Customization – Support shaft, wiring, connector, gearbox, and mechanical interface customization.
• Engineering Evaluation Support – Assist with prototype testing, motor matching, and system integration optimization.
• Cost-Effective Replacement Solutions – Provide practical alternatives to internationally recognized motor brands while maintaining reliable performance.
• Flexible Sample & Production Supply – Support rapid evaluation and stable OEM manufacturing.
• Long-Term Technical Partnership – Work with engineering teams to improve integration efficiency and accelerate product development.

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