Brushless motor RB-3650-68 series

BLDC12 V24 V

Product overview
RB-3650-68 is an outer-rotor Brushless DC Motor (BLDC) in the 36 mm class manufactured by KWC Motor, Dongguan KWC Machinery Co., Ltd. The series includes a 50 mm body-length flagship option and is specified for applications requiring elevated torque and variable voltage ranges (typical 8.0–26.0V depending on model).

Key facts for engineering buyers

• Product category: Brushless DC Motors (BLDC)
• Motor family: Outer-rotor BLDC, 36 mm class
• Brand / manufacturer: KWC Motor, Dongguan KWC Machinery Co., Ltd.
• Typical applications: surgical tools, centrifuges, fans, pumps, blowers, power tools

Specification signals

• Outer diameter: 36 mm
• Body length (flagship): 50 mm
• Peak / max-efficiency torque: up to 341.5 g·cm (model dependent)
• Voltage range (examples): 8.0V–26.0V

Customization and sourcing notes
KWC Motor supports OEM/ODM customization including operating voltage, speed, torque tuning, shaft length and form (D-shaft / threaded), mounting hole pattern, gearbox or encoder preassembly, lead wire/connector options and EMC/noise targets. Pricing and lead times are provided after application, specification and quantity are confirmed.

Target applications & solutions

• Medical & laboratory equipment: Suitable for surgical power tools, centrifuges and medical micro-pumps. The outer-rotor design provides increased inertia to help maintain speed stability at high RPMs.
• Industrial fluid handling & air-moving: Applicable to high-power blowers, air/water pumps, mixers and fans. High power density (example up to 31.8 W) enables driving higher-resistance loads.

Technical specifications (datasheet summary)
Data source: KWC RB-3650-68 datasheet. Deep customization available for voltage, speed and shaft length.
Model | Operating Voltage Range | Nominal Voltage | No-Load Speed | Max Efficiency Speed | Max Efficiency Torque | Output (at Max Efficiency)
RB-3650-68-N-01 | 9.0V - 14.0V | 12.0V | 5300 rpm | 4302 rpm | 341.5 g·cm | 15.1 W
RB-3650-68-N-02 | 19.0V - 26.0V | 24.0V | 13800 rpm | 11680 rpm | 265.3 g·cm | 31.8 W
RB-3650-68-N-03 | 8.0V - 26.0V | 12.0V | 5400 rpm | 4100 rpm | 255.0 g·cm | 10.76 W
RB-3650-68-N-04 | 8.0V - 26.0V | 24.0V | 12000 rpm | 9000 rpm | 306.0 g·cm | 28.34 W

Comparison highlights

• Torque smoothness: Outer-rotor inertia improves torque consistency vs. standard inrunner designs.
• Torque output: Max example 341.5 g·cm (variant dependent).
• Power density: Example up to 31.8 W in higher-voltage variants.

Purchasing FAQ (summary)

• MOQ: Flexible; samples available (1–5 pcs). Pilot runs typically 100–500 pcs; 1,000+ pcs recommended for mass production.
• Datasheet / drawings: Detailed datasheet and mechanical drawings available on request.
• Packaging: Industrial blister trays + reinforced cartons; palletized export packing available.

Characteristics / technical specifications

• Model / series: RB-3650-68
• Motor type: Outer-rotor Brushless DC Motor (BLDC)
• Outer rotor diameter: 36 mm
• Flagship body length: 50 mm (ultra-long body option)
• Available models: RB-3650-68-N-01 / N-02 / N-03 / N-04
• Operating voltage ranges: 8.0V–26.0V (varies by model)
• No-load speed range: up to 13,800 rpm (model dependent)
• Max efficiency torque: up to 341.5 g·cm
• Output (at max efficiency): up to 31.8 W
• Typical applications: surgical tools, centrifuges, fans, blowers, pumps, power tools, mixers
• Customization options: voltage, speed, torque, shaft length/type, mounting pattern, gearbox/encoder, lead wires/connectors, EMC/noise measures
• Quality: 100% noise and current testing; RoHS/REACH compliance noted