Brushless motor RB-3657-68 series

BLDC24 V12 V

Product Overview
RB-3657-68 is an outer-rotor Brushless DC Motor (BLDC) with a 36 mm diameter and an extended 57 mm body length. Available in multiple electrical variants, the series delivers up to 77.12 W in the highest-power SKU and a maximum no-load speed of 27,000 rpm, making it suitable as a brushless upgrade for devices that formerly used universal motors.

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: high-speed blenders, centrifuges, commercial coffee machines, handheld power tools, pumps, fans

Specification Signals

• Diameter: 36 mm
• Body length (extended): 57 mm
• Maximum no-load speed: 27,000 rpm
• Peak output power: up to 77.12 W (RB-3657-68-N-04)

Customization and Sourcing Notes
KWC Motor supports OEM/ODM customization for operating voltage, nominal voltage, speed, torque, shaft design (D-shaft or threaded), mounting patterns, gearbox integration, encoders, cable/connector options and EMC/noise targets. Electrical parameters, shaft length/type and EMC countermeasures are tailored per application. Final pricing is quoted after confirmation of specifications, quantity and customization requirements.

Target Applications & Solutions
Premium Kitchen Appliances & Centrifugal Equipment
Suitable for high-speed blenders/mixers, centrifuges and commercial coffee machines. The outer-rotor design provides higher rotational inertia and stable operation at elevated speeds when processing dense or hard materials.

Power Tools & Fluid Handling Equipment
Applicable to handheld power tools, high-pressure air/water pumps and fans. With power density up to 77 W, select variants support continuous high-load operation.

Technical Specifications
Model | Operating Voltage | Nominal Voltage | No-Load Speed | Speed @ Max Efficiency | Torque @ Max Efficiency | Output Power
RB-3657-68-N-01 | 9.0V – 16.0V | 12.0V | 3000 rpm | 2595 rpm | 270.0 g·cm | 7.20 W
RB-3657-68-N-02 | 12.0V – 26.0V | 24.0V | 5000 rpm | 4752 rpm | 485.0 g·cm | 23.60 W
RB-3657-68-N-03 | 8.0V – 26.0V | 24.0V | 6900 rpm | 5200 rpm | 428.4 g·cm | 22.92 W
RB-3657-68-N-04 | 8.0V – 26.0V | 24.0V | 27000 rpm | 21000 rpm | 357.0 g·cm | 77.12 W

Purchasing & Production Notes
No MOQ for samples (1–5 pcs). Pilot orders: 100–500 pcs. Mass production recommended from 1,000 pcs. Standard sample lead time: 7–14 days. 100% inspection; RoHS / REACH compliant.

Characteristics / Technical specifications

• Model: RB-3657-68 series
• Motor type: Outer-rotor Brushless DC Motor (BLDC)
• Diameter: 36 mm
• Extended body length: 57 mm (allows higher-power windings)
• Output power (max model RB-3657-68-N-04): 77.12 W
• No-load speed (max): 27,000 rpm
• Typical operating voltage ranges: 8.0V–26.0V (varies by SKU)
• Available nominal voltages: 12.0V, 24.0V (varies by SKU)
• Torque examples: up to 485.0 g·cm (RB-3657-68-N-02)
• Customization options: voltage, speed, torque, shaft length/type (D-shaft / threaded), mounting patterns, gears, encoders, wire harnesses, EMC/noise measures
• Applications: high-speed blenders/mixers, centrifuges, commercial coffee machines, handheld power tools, pumps, fans