Brushless motor RB-4118-C8 series

BLDC6 V12 V

Product Overview
RB-4118-C8 is a Brushless DC Motor (BLDC) from KWC Motor (Dongguan KWC Machinery Co., Ltd.) designed for space-constrained medical devices. The motor features a 41 mm diameter with an 18 mm body profile in an outer-rotor configuration, intended for applications that require compact integration, stable low-speed airflow and low acoustic signature.

Key Facts for Engineering Buyers

• Product category: Brushless DC Motors
• Motor family: Brushless DC Motor (BLDC)
• Brand / manufacturer: KWC Motor (Dongguan KWC Machinery Co., Ltd.)
• Typical applications: portable ventilators, oxygen concentrators, precision pumps, laboratory instruments

Specification Signals

• Diameter: 41 mm
• Body Length (profile): 18 mm

Customization and Sourcing Notes

• OEM/ODM customization supported for voltage, speed, torque, shaft design, cable/connector requirements, gearbox integration, encoder options, control board and EMC/noise targets.
• Shaft length, shaft type (D-shaft / threaded), mounting hole patterns and performance parameters are adjustable per requirement. Final pricing follows confirmation of application, specifications, quantity and customization scope.
• Sampling: standard samples typically available in 7–14 days depending on options.

Target Applications & Solutions

• Portable Ventilators & Oxygen Concentrators: Outer-rotor design increases rotor inertia, supporting stable airflow at low speeds and reduced audible noise — suitable for CPAP/BiPAP units and portable oxygen systems.
• Precision Medical Pumps & Instruments: Low 18 mm profile enables lighter, slimmer device designs; BLDC architecture supports long maintenance-free operation for extended service life.

Technical Specifications (model variants)
RB-4118-C8-N-01 | Operating Voltage Range: 9.0V – 16.0V | Nominal Voltage: 12.0V | No-Load Speed: 3400 rpm | Speed @ Max Efficiency: 2800 rpm | Torque @ Max Efficiency: 1265 g·cm | Output Power: 36.0 W
RB-4118-C8-N-02 | Operating Voltage Range: 9.0V – 16.0V | Nominal Voltage: 13.0V | No-Load Speed: 3700 rpm | Speed @ Max Efficiency: 3070 rpm | Torque @ Max Efficiency: 1346 g·cm | Output Power: 42.0 W
RB-4118-C8-N-03 | Operating Voltage Range: 6.0V – 26.0V | Nominal Voltage: 24.0V | No-Load Speed: 3400 rpm | Speed @ Max Efficiency: 2800 rpm | Torque @ Max Efficiency: 1265 g·cm | Output Power: 36.0 W
RB-4118-C8-N-04 | Operating Voltage Range: 6.0V – 26.0V | Nominal Voltage: 18.0V | No-Load Speed: 3400 rpm | Speed @ Max Efficiency: 2800 rpm | Torque @ Max Efficiency: 1265 g·cm | Output Power: 36.0 W

Additional Product Notes

• Maximum output power up to 42.0 W depending on variant; start-up/blocking torque indicated at ~9000 g·cm class in product documentation.
• Outer-rotor configuration contributes to higher inertia, aiding low-speed stability and lower acoustic emissions.
• Quality controls include noise and current testing; RoHS / REACH compliance is noted; packaging: industrial blister tray with reinforced cartons; palletized export packing available.
• MOQ guidance: samples 1–5 pcs; pilot orders 100–500 pcs; mass production recommendation ~1,000 pcs.

Characteristics / Technical specifications

• Model (commercial denomination): RB-4118-C8
• Brand: KWC Motor (Dongguan KWC Machinery Co., Ltd.)
• Motor type: Brushless DC Motor (BLDC), outer-rotor, low-profile (medical grade)
• Diameter: 41 mm
• Body length (profile): 18 mm
• Maximum output power: up to 42.0 W (depends on variant)
• Start-up/blocking torque: approx. 9000 g·cm class (documented reference)
• Typical applications: portable ventilators, oxygen concentrators, precision pumps, laboratory instruments
• Customization options: voltage, speed, torque tuning; shaft length/type; mounting patterns; optional gears, worm shafts, encoders, wire harness/terminals; EMC/noise countermeasures