Brushless motor RB-4240-C8 series

BLDC12 V18 V

Product Overview
RB-4240-C8 is a 42 mm Brushless DC Motor (BLDC) from KWC Motor. It delivers up to 140 W rated power in high-power variants and provides high torque suited to lawnmowers, service robots, food processors and centrifuges. Multiple nominal voltage options and a high-density winding design support heavy-load applications.

Key Facts for Engineering Buyers

• Product category: Brushless DC Motors (BLDC)
• Motor family: RB-4240-C8 series
• Brand / manufacturer: KWC Motor (Dongguan KWC Machinery Co., Ltd.)
• Typical applications: robot lawnmowers, commercial cleaning/service robots, high-end food processors, centrifuges

Specification Signals

• Diameter: 42 mm (square / NEMA 17 form factor)
• Output Power: up to 140 W (variant-dependent)

Customization and Sourcing Notes
KWC Motor supports OEM/ODM customization for voltage, speed, torque, shaft design, cable or connector requirements, gearbox integration, control options and EMC/noise targets. Shaft length and type (D-shaft / threaded), mounting patterns, optional gears, worm shafts, encoders and wire harness/terminals can be specified. Final pricing is provided after confirmation of application, specifications, quantity and customization scope.

Target Applications & Solutions

• Robotics & Outdoor Power: Suitable for robot lawnmowers, commercial cleaning robots and service robots where high torque and reliable traction are required.
• Premium Kitchen Appliances & Centrifugal Equipment: Applicable to high-end food processors, blenders and high-speed centrifuges requiring sustained output up to 140 W.

Technical Specifications (table)
Model | Operating Voltage | Nominal Voltage | No-Load Speed | Speed @ Max Efficiency | Torque @ Max Efficiency | Output Power
RB-4240-C8-N-01 | 9.0V – 26.0V | 24.0V | 7000 rpm | 6000 rpm | 1428 g·cm | 140 W
RB-4240-C8-N-02 | 9.0V – 26.0V | 12.0V | 3500 rpm | 3000 rpm | 836 g·cm | 82 W
RB-4240-C8-N-03 | 9.0V – 26.0V | 12.0V | 7000 rpm | 6000 rpm | 1428 g·cm | 140 W
RB-4240-C8-N-04 | 9.0V – 26.0V | 18.0V | 7000 rpm | 6000 rpm | 1428 g·cm | 140 W

Quality, Production and Delivery Notes
Factory-direct manufacturing with tooling workshop and automated assembly lines. 100% inspection including noise and current testing before shipment. RoHS / REACH compliant. Standard sample lead time typically 7–14 days; pilot and mass-production capacities available with recommended MOQs for large orders.

Characteristics / technical specifications

• Model / series: RB-4240-C8
• Motor type: Brushless DC Motor (BLDC)
• Outer diameter: 42 mm (square / NEMA 17 form factor)
• Rated output power: up to 140 W (variant-dependent)
• Stall torque (example): approx. 1.4 N·m (14,400 g·cm) — check variant datasheet
• Operating voltage range: 9.0 V – 26.0 V (variant-dependent)
• Nominal voltages available: 12 V, 18 V, 24 V (variant-dependent)
• No-load and efficiency speeds: up to 7000 rpm; speeds at max efficiency typically 3000–6000 rpm
• Customization options: voltage, speed, torque, shaft length/type, mounting patterns, gearbox/encoder integration, cable/connectors, EMC/noise countermeasures
• Compliance / testing: RoHS / REACH; noise and current testing before shipment