Brushed motor RS-3665ST series

DC6 V18 V

Product Overview
RS-3665ST is a 36 mm brushed DC motor with an extended 65 mm can length from KWC Motor. It delivers higher torque and power than typical 555-size units, supports a wide voltage range (3–36 V), and is available in variants optimized for different nominal voltages, speeds and torque profiles.

Key Facts for Engineering Buyers

• Product category: Brushed DC motors
• Motor family: RS-3665ST series
• Brand / manufacturer: KWC Motor (Dongguan KWC Machinery Co., Ltd.)
• Typical applications: handheld drills, portable fans, pumps, automation equipment

Specification Signals

• Diameter: 36 mm
• Body length (can length): 65 mm
• Voltage range: 3 V – 36 V (model dependent)
• Maximum no-load speed (high-speed variant): up to 20,500 rpm

Target Applications & Solutions
RS-3665ST’s 65 mm can provides increased magnetic flux and torque reserve compared with standard 555-length motors, enabling higher stall torque for heavy-load handheld tools and high-airflow devices.

• Industrial-grade power tools: Suitable for drills, cordless screwdrivers and saws; higher torque at low speed and greater thermal mass for extended duty cycles.
• Portable high-airflow fans & pump applications: Suitable for portable high-output fans, inflators and vacuum devices; high-speed variant RS-36653ST-6431 reaches 20,500 rpm and can drive larger impellers.

Customization and Sourcing Notes
KWC supports OEM/ODM customization including voltage, speed, torque, shaft design, cable/connector options, gearbox integration, control requirements, brush type, shaft length and internal cooling fan options. Pricing and lead time are confirmed after specifying application, exact specs, quantity and customization requirements.

RS-3665ST Technical Specifications
Model | Operating Voltage (Range) | Nominal Voltage | No-load Speed | Speed @ Max. Efficiency | Output Power | Stall Torque
RS-36653ST-9012 | 3.0V – 9.0V | 6.0V | 17,000 rpm | 14,779 rpm | 49.49 W | 3864 g·cm
RS-36653ST-6431 | 12.0V – 18.0V | 18.0V | 20,500 rpm | 18,175 rpm | 45.59 W | 4100 g·cm
RS-366555T-3750 | 6.0V – 24.0V | 6.0V | 2,000 rpm | 1,621 rpm | 4.37 W | 1560 g·cm
RS-36655ST-23120 | 24.0V – 36.0V | 30.0V | 5,000 rpm | 4,330 rpm | 13.50 W | 2273 g·cm

Customization notes

• Shaft diameter: 3.175 mm (typical)
• Can length: 65.0 mm
• Options: brush type (carbon/metal), shaft length, internal cooling fan, front ball bearing, D-shaft and knurled shaft, pre-soldered leads, capacitors and connectors

Technical summary / Specifications

• Model / Series: RS-3665ST
• Diameter: 36 mm (approx. 35.8 mm referenced)
• Body / Can length: 65 mm
• Voltage range: 3 V – 36 V (variant dependent)
• Nominal voltages (examples): 6.0 V, 18.0 V, 30.0 V
• No-load speed examples: up to 20,500 rpm
• Output power examples: up to ~49.49 W (model dependent)
• Stall torque examples: up to ~4.1 kg·cm (4100 g·cm)
• Compliance: ROHS / REACH materials; durability and stall/lifetime testing for power-tool duty profiles