DC motor RS-3640ST series

direct currentbrushed6 V

Product Overview
RS-3640ST is a 36 mm diameter, 40 mm body length brushed DC motor from KWC Motor. It operates across a wide voltage range (typical configurations 6V–36V) and offers stall torque up to approximately 700 g·cm, making it suitable for applications requiring compact size with elevated low-speed torque.

Key Facts for Engineering Buyers

• Product category: Brushed DC Motors
• Motor family: Brushed DC Motor
• Brand / manufacturer: KWC Motor
• Typical applications: vending machine dispensing mechanisms, diaphragm air pumps, compact power tools

Specification Signals

• Diameter: 36 mm
• Body length: 40 mm
• Operating voltage range: 6V – 36V (variant dependent)

Target Applications & Solutions
The RS-3640ST is a standard 36 mm-class brushed DC motor that delivers higher torque and smoother low-speed performance compared with 28 mm series motors. Its compact 40 mm body suits installations with limited axial space while providing torque suitable for dispensing, pumping and small drive systems.

Vending Machines & Commercial Equipment
Designed for spiral or channel dispensing mechanisms and small commercial appliances (for example coffee machines). When combined with a gearbox, the RS-3640ST provides stable low-speed, high-torque output for accurate dispensing and long service intervals.

Air Pumps & Power Tools
Suitable for diaphragm and precision air pumps, medical and industrial small compressors, and compact handheld tools. Wide voltage capability and variant-specific output power (approx. 3.9–7.2 W) support continuous or intermittent operation depending on thermal and duty-cycle constraints.

Technical Specifications (examples)
Model | Operating Voltage | Nominal Voltage | No-load Speed | Speed @ Max. Efficiency | Output Power | Stall Torque
RS-36403ST-151805 | 6.0V – 36.0V | 24.0V | 5,700 rpm | 4,613 rpm | 5.59 W | 688 g·cm
RS-36403ST-2480 | 6.0V – 36.0V | 12.0V | 6,450 rpm | 5,131 rpm | 7.15 W | 727 g·cm
RS-36403ST-15245 | 12.0V – 36.0V | 24.0V | 4,000 rpm | 3,305 rpm | 3.93 W | 666 g·cm
RS-36403ST-22125 | 6.0V – 24.0V | 12.0V | 4,000 rpm | 3,226 rpm | 4.20 W | 704 g·cm

Customization Notes
Shaft diameter is typically 3.175 mm (1/8"), body length 40 mm. Windings, brush materials, shaft length and geometry, EMC/EMI suppression components, connector/cable options and gearbox integration can be customized. Final specifications and pricing depend on confirmed application, quantities and chosen options.

Purchasing FAQ (selected)

• Q: Is this a 540 motor?
  A: Not exactly. The RS-3640ST has a 36 mm diameter (similar to 540-class), but a shorter body length (40 mm vs. ~50 mm for a typical 540), making it better for space-constrained assemblies while retaining high-torque characteristics.
• Q: Is it suitable for 24V vending machines?
  A: Yes. The RS-36403ST-15245 variant is designed for 24V systems and, when paired with an appropriate gearbox, provides suitable dispensing speed and torque.

Characteristics / Technical summary

• Model: RS-3640ST (variants available)
• Diameter: 36 mm
• Body length: 40 mm
• Operating voltage range: 6.0V – 36.0V (variant dependent)
• Typical stall torque: up to ~700 g·cm (varies by variant)
• Typical output power: ~3.93 W – 7.15 W (depending on variant)
• No-load speeds (examples): 4,000 – 6,450 rpm (depending on variant)
• Shaft diameter (standard): 3.175 mm (1/8")
• Customizable: windings, shaft, brush material, EMC components, gear integration, connectors