17mm Hollow Cup Motor 6–24 V 9.8 mN·m DC Motor for Robotics | BDCB1740 BODENMOTION

Overview of BDCB1740 17mm Hollow Cup Motor

The BDCB1740 17mm hollow cup motor is built for robotic mechanisms that need stronger torque and power without moving to a substantially larger motor diameter. Its Ø17 × 40 mm graphite brushed platform provides a 10–30W power class, rated torque up to 9.8 mN·m, and a 48 g structure suitable for compact actuators, joints, and transmission assemblies.

The three winding versions support 6V, 12V, and 24V systems, allowing OEM engineers to balance supply voltage, operating current, speed, and torque according to the robot architecture. The 12V version reaches the highest rated speed at 18,590 rpm, while the 24V version provides the highest rated torque at 9.8 mN·m with a lower nominal current of 0.74 A.

Key Features of BDCB1740 High-Torque Coreless Motor

• High Rated Torque – Rated torque reaches 9.8 mN·m, providing useful mechanical margin for compact robotic joints, grippers, and actuator modules.
• Strong Output from a 17mm Frame – The Ø17 mm motor diameter combines compact radial packaging with a 40 mm body that supports a 10–30W power class.
• High Rotational Speed – Rated speed reaches 18,590 rpm, allowing the motor to support both direct high-speed mechanisms and geared actuator designs.
• Up to 80.4% Maximum Efficiency – The 24V winding reaches the highest measured efficiency, helping reduce unnecessary electrical loss near its optimized operating point.
• Graphite Brush Durability – The graphite brush system is suited to repeated operating cycles and longer service requirements than precious-metal brushed alternatives.
• Planetary Gearbox Compatibility – An optional planetary gearbox can reduce output speed and multiply torque for robotics and industrial actuation.

Technical Specifications of BDCB1740 Graphite Brush Motor

The suffixes identify separate winding configurations. Voltage, driver current capacity, target speed, torque demand, and duty cycle should be evaluated together before selecting the final motor version.

Motor Model	Unit	BDCB1740-01	BDCB1740-02	BDCB1740-03
At Nominal
Nominal Voltage	V/DC	6	12	24
Nominal Speed	rpm	11,408	18,590	13,520
Nominal Current	A	1.54	1.97	0.74
Nominal Torque	mN·m	6.0	9.5	9.8
Free Load
No-load Speed	rpm	13,500	22,000	16,000
No-load Current	mA	120	130	48
At Max. Efficiency
Maximum Efficiency	%	78.6	80.3	80.4
Speed	rpm	12,218	19,910	14,480
Current	A	0.99	1.26	0.47
Torque	mN·m	3.7	5.8	6.0
At Max. Output Power
Maximum Output Power	W	13.59	35.22	26.43
Speed	rpm	6,750	11,000	8,000
Current	A	4.71	6.07	2.27
Torque	mN·m	19.2	30.6	31.5
At Stall
Stall Current	A	9.30	12.00	4.50
Stall Torque	mN·m	38.5	61.2	63.1
Motor Constants
Terminal Resistance	Ω	0.65	1.00	5.33
Terminal Inductance	mH	0.028	0.075	0.290
Torque Constant	mN·m/A	4.19	5.15	14.17
Speed Constant	rpm/V	2,250.0	1,833.3	666.7
Speed/Torque Constant	rpm/mN·m	351.0	359.7	253.6
Mechanical Time Constant	ms	6.2	6.4	4.5
Rotor Inertia	g·cm²	1.69	1.69	1.69
Number of Pole Pairs	—	1	1	1
Number of Phases	—	5	5	5
Weight	g	48	48	48
Typical Noise Level	dB	≤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 BDCB1740 DC Motor for Robotics

The BDCB1740 provides higher torque and power than shorter 17 mm motors, but the final actuator design must still manage shaft loading, coupling alignment, current demand, and heat generation.

Radial and Axial Load Control
The bearing system supports a maximum dynamic axial load of 0.8 N and a maximum radial load of 8 N, measured 5 mm from the flange. External bearings or additional support should be considered when gears, belts, or offset loads create higher shaft forces.

Shaft Alignment
Axial play is specified at 0–0.1 mm, while radial play is limited to 0.015 mm. Accurate alignment between the motor, coupling, and gearbox helps reduce vibration, bearing stress, and uneven brush loading.

Driver and Supply Sizing
Nominal current ranges from 0.74 to 1.97 A, but stall current reaches 4.5–12 A. The driver and power supply should provide suitable acceleration current while using current limiting to protect the winding and brush system.

Thermal Validation
The permitted ambient temperature range is −20°C to +80°C, and rotor temperature should remain below 125°C. Temperature testing should use the actual enclosure, gearbox, operating cycle, and mechanical load.

Gearbox Integration
A planetary gearbox can convert the motor’s rotational speed into higher actuator torque. Gear ratio selection should account for required joint speed, transmission efficiency, startup load, and reflected inertia.

OEM Customization Options for BDCB1740 17mm Hollow Cup Motor

Customization should focus on the elements that directly affect robotic integration and actuator performance. Options beyond the standard specification remain subject to engineering confirmation.

Customization Item	Available Options / Description
Winding Version	Standard 6V, 12V, or 24V configuration
Operating Point	Selection based on target speed, torque, current, and duty cycle
Shaft Configuration	Shaft length and output geometry can be reviewed for the transmission
Gearbox Option	Planetary gearbox for reduced speed and increased output torque
Lead Wire Length	Cable length and routing reviewed according to actuator layout
Connector Type	Connector format matched to the controller and wiring harness
Mounting Interface	Mechanical adaptation reviewed for the robotic assembly
Terminal Arrangement	Electrical terminal configuration subject to project requirements
Prototype Configuration	Sample motor selected for load, temperature, and lifetime testing

The planetary gearbox is the optional component explicitly identified in the specification; other modifications should be confirmed according to technical feasibility and order requirements.

Application Fields for BDCB1740 Motor for Robotics

The BDCB1740 is suited to systems where compact diameter, relatively high torque, and a durable brushed motor platform are more important than minimizing motor length or weight.

• Robotic Joint Actuators – Drives compact rotary joints when combined with a suitable planetary gearbox.
• Robotic Grippers – Provides torque for finger closing, clamping, and gripping mechanisms with repeated motion cycles.
• End-Effector Modules – Powers tool-changing, adjustment, and rotary functions at the end of a robotic arm.
• Service Robot Mechanisms – Supports internal wheels, adjustment mechanisms, and compact auxiliary actuators.
• Industrial Automation Actuators – Drives indexing, positioning, valve, and linkage mechanisms requiring higher torque density.
• Powered Assistive Devices – Can be evaluated for compact adjustment mechanisms where predictable brushed motor control is preferred.

Final selection should be based on joint torque, gearbox ratio, movement cycle, holding requirements, available current, and expected maintenance interval.

Why Choose BODENMOTION for Your High-Torque Coreless Motor Project

A motor for robotics should not be selected from rated torque alone. Gear reduction, startup friction, reflected inertia, holding time, brush loading, and current limits all influence the usable output of the final actuator.

• Robotic Joint Torque Review – Motor torque, gearbox ratio, transmission efficiency, and required joint torque are evaluated together.
• Duty-Cycle and Brush-Life Assessment – Movement frequency, acceleration current, holding periods, and operating temperature are reviewed to reduce premature brush wear.
• Driver Current Matching – Nominal, acceleration, maximum-output, and stall currents are compared with the controller and power-supply limits.
• Gearbox Integration Support – Planetary gearbox ratio, output speed, torque reserve, backlash, and mechanical interface can be reviewed for the actuator.
• Cost-Effective Alternative to Premium Brands – BODENMOTION provides a practical graphite brushed motor platform for OEM teams seeking customized performance without premium-brand sourcing costs.
• Prototype Validation Before Production – Samples can be tested under the real robotic load, movement profile, controller settings, and enclosure conditions before volume production.

Customer Feedback

Germany | Robotics System Integrator
Application: compact rotary joint actuator
Feedback: The 24V winding provided the required torque with lower operating current, while the planetary gearbox helped meet the target joint speed.

Japan | End-Effector Manufacturer
Application: electric gripper mechanism
Feedback: The Ø17 mm motor frame provided useful torque within the available housing diameter and supported repeated gripping cycles during prototype testing.

United States | Automation Equipment Developer
Application: indexing actuator
Feedback: The 12V version supplied the required speed margin while maintaining a compact mechanical layout for the integrated transmission module.

Downloads – Datasheet

[BDCB1740 17mm Hollow Cup Graphite Brushed DC Motor Specification PDF]

FAQ – BDCB1740 Graphite Brush Motor

Q1: Why does the robotic joint produce less torque than the calculated gearbox output?

A1: Actual joint torque is reduced by gearbox efficiency, bearing friction, coupling losses, misalignment, and changes in supply voltage. The calculation should also include startup friction and the torque needed to accelerate the load inertia.

Q2: Can the 35.22W maximum-output value be used continuously?

A2: Not automatically. The 35.22W value applies to the 12V winding at a specific maximum-output test point, where current reaches 6.07 A and speed falls to 11,000 rpm. Continuous use should be confirmed through temperature, brush-wear, and duty-cycle testing.

Q3: Which winding is more suitable for a robotic actuator?

A3: The choice depends on the available voltage, current limit, target motor speed, and gearbox ratio. The 12V version provides the highest rated speed, while the 24V version provides the highest rated torque with lower nominal current.

Q4: Can customers visit the BODENMOTION factory?

A4: BODENMOTION is located in Shenzhen, China. Customer visits can be arranged by appointment so the relevant engineering, production, and project teams are available.

Q5: Is there a shorter 17mm graphite brushed alternative?

A5: Yes. The BDCB1725 uses a shorter Ø17 × 25 mm body, weighs 28 g, and provides rated torque of 3.28–3.81 mN·m. It is more suitable when axial space and weight are more important than the BDCB1740’s higher torque and power capability.

Contact BODENMOTION – 17mm Hollow Cup Motors for Robotics

For robotic joints, grippers, and compact automation actuators, BODENMOTION supports motor selection based on the complete load, gearbox, controller, and duty-cycle requirements.

What We Can Provide

• Joint Torque Evaluation – Review motor torque, reduction ratio, transmission efficiency, and required actuator output.
• Winding and Driver Matching – Compare the 6V, 12V, and 24V versions against the available voltage and current capacity.
• Duty-Cycle Review – Evaluate acceleration, run time, holding periods, rest time, and brush-life expectations.
• Gearbox and Shaft Integration – Coordinate gearbox ratio, output speed, shaft geometry, coupling, and mounting requirements.
• Prototype Actuator Testing – Verify current, torque, temperature, noise, speed, and repeatability under the real movement profile.
• OEM Production Support – Support samples, pilot builds, approved custom configurations, and stable long-term manufacturing.

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