DESCRIPTION
The ChiHai CHR-K370WD is a high-performance 370 brushed DC motor designed for RC toys, robotics, DIY upgrades, and high-speed motion applications. Featuring a compact 24.4mm motor body, dual ball bearing support, and NdFeB magnetic structure, this motor delivers strong torque output, stable high-speed performance, and improved durability.
This series includes multiple performance versions, including high torque mid-speed and high-speed variants in black and gold finishes. Some versions are pre-installed with MP9 small pinion gears for direct replacement and simplified installation.
The motor adopts a D-shaped shaft structure for secure gear installation and reduced slipping. The housing includes cooling ventilation openings to improve heat dissipation during high-load operation.
A customized spring connector wire pair is included to reduce wiring damage caused by soldering errors or prolonged soldering heat exposure.
KEY FEATURES
- High-performance 370 brushed DC motor
- Dual ball bearing structure
- NdFeB magnet motor design
- High torque and high-speed output
- D-shaped output shaft
- Metal pinion gear versions available
- Cooling ventilation housing
- Dynamic rotor balancing treatment
- Compact lightweight structure
- Suitable for RC upgrades and DIY projects
- Available in black and gold shell versions
APPLICATIONS
- RC toy upgrades
- DIY motor projects
- Robotics
- Mechanical devices
- High-speed drive systems
- Small electric equipment
- Model vehicles
- Experimental motion systems
- Related Collections→
SPECIFICATIONS
| Parameter | Specification |
|---|---|
| Brand | ChiHai Motor |
| Model | CHR-K370WD |
| Motor Type | Brushed DC Motor |
| Motor Size | 24.4 × 31mm |
| Shaft Length | 9.5mm |
| Shaft Type | D-shaped Shaft |
| D Shaft Flat Thickness | 1.5mm |
| D Shaft Flat Length | 6.5mm |
| Voltage | DC 11.1V |
| Weight | Approx. 52g |
| Bearing Type | Dual Ball Bearings |
| Magnet Type | NdFeB Magnet |
| Housing Type | Ventilated Metal Housing |
| Connector | Spring Connector Wire Pair Included |
MOTOR PERFORMANCE TABLE
| Parameter | Specification |
|---|---|
| Test Voltage | DC 11.1V |
| No-load Speed | 61000 RPM |
| No-load Current | 2.9A |
| Maximum Efficiency Power | 147W |
| Max Efficiency Speed | 52800 RPM |
| Max Efficiency Load | 270 g.cm |
| Max Efficiency Current | 18.7A |
| Maximum Power Output | 317W |
| Max Power Speed | 32000 RPM |
| Max Power Load | 1010 g.cm |
| Max Power Current | 58.55A |
| Stall Torque | 2020 g.cm |
| Stall Current | 120A |
AVAILABLE VERSIONS
| Version | Description |
|---|---|
| MP9 High Torque Mid-Speed Black | DC 11.1V 28000RPM / DC 7.4V 18000RPM |
| MP9 High Speed Gold | DC 11.1V 50000RPM / DC 7.4V 33000RPM |
| MP9 Black Version | DC 11.1V 33000RPM / DC 7.4V 22000RPM |
| 370 Torque Motor Black Gold | 11.1V 28000RPM |
| 370 Torque & Speed Gold | 11.1V 52000RPM / 7.4V 34000RPM |
STRUCTURE FEATURES
| Feature | Details |
|---|---|
| Magnet Material | Sintered NdFeB Magnet |
| Bearing Structure | Dual Ball Bearings |
| Rotor Treatment | Dynamic Rotor Balancing |
| Housing | Cooling Ventilation Metal Shell |
| Brush Type | High Wear-resistant Carbon Brush |
| Pinion Gear | Powder Metallurgy Metal Gear |
DIMENSIONS
| Parameter | Value |
|---|---|
| Motor Diameter | 24.4mm |
| Motor Length | 31mm |
| Shaft Length | 9.5mm |
| Shaft Diameter | 2.3mm Approx. |
| Mounting Hole | M3 |
PACKAGE CONTENTS
| Package Type | Included Items |
|---|---|
| Standard Motor | CHR-K370WD Motor |
| MP9 Gear Version | Motor with Pre-installed MP9 Pinion Gear |
| Wired Version | Motor with Spring Connector Wires |
IMPORTANT NOTES
| Note | Details |
|---|---|
| Soldering Recommendation | Use included spring connector wires to avoid motor damage |
| High-Speed Use | High-speed versions generate more heat during operation |
| Installation Note | Avoid excessive force when removing connectors |
| Gear Notice | Some versions include pre-installed MP9 gears |
| Usage Suggestion | Mid-speed versions provide higher torque and improved durability |
