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11
2026
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08
Comprehensive Performance Specifications of the Standard 370 Motor
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Explore comprehensive performance specifications of the 370 motor, including electrical parameters, dimensions, and expert selection criteria for your design.
Author:
KESHUO
Typical Performance Characteristics of the 370 Motor Series
1. Introduction to the 370 Motor Series
Selecting a miniature DC actuator remains a fundamental design challenge for engineers developing battery‑operated mechanisms, automated locking devices, and precision hobby platforms. When continuous rotation within a compact envelope is required, the 370 motor (commonly referred to as a 370 motor brushed motor) serves as a popular power source across many engineering disciplines. However, the designation "370" does not define a single fixed specification; rather, it describes a family of motors that share similar frame dimensions (≈24 mm diameter, ≈30 mm body length) but exhibit widely different electrical and mechanical characteristics depending on winding configurations, magnet materials, and brush types. This guide outlines the typical operational parameters, physical attributes, and dynamic behaviour of common 370‑series units, helping design engineers and procurement teams evaluate which variant best suits their particular electromechanical integration.
2. Core Electrical and Mechanical Parameters
370‑series motors are typically rated for operation between 6 V and 12 V DC, though some variants can handle higher or lower voltages. At a given voltage, the no‑load speed, current draw, torque capability, and efficiency vary significantly between models. For example, a high‑speed winding may deliver over 15 000 RPM at 12 V, while a torque‑optimised winding might only reach 3 000–5 000 RPM. Similarly, no‑load current at 12 V commonly falls in the range of 0.02 A to 0.12 A, but some specialised units can draw more.
The table below gives typical ranges observed for common 370‑series variants. These values are not universal; they serve as a starting point for preliminary selection. Always consult the specific manufacturer's datasheet for accurate figures.
| Parameter | Typical Range (6 V DC) | Typical Range (12 V DC) |
|---|---|---|
| No‑Load Speed | 6 000 – 10 000 RPM | 10 000 – 15 000 RPM |
| No‑Load Current | 0.02 – 0.08 A | 0.04 – 0.12 A |
| Stall Current | 0.5 – 3 A (model‑dependent) | 1 – 6 A (model‑dependent) |
| Peak Efficiency | 55% – 65% | 55% – 65% |
*Rated torque and stall torque are highly winding‑dependent and are therefore omitted from the general table; they can range from a few mN·m to over 20 mN·m in extreme designs.
Peak efficiency often occurs at around one‑third of the stall‑torque point in many DC motors, but this relationship is not guaranteed for every 370 variant. Engineers should always verify the load profile and efficiency curves from the datasheet of the chosen model to avoid excessive heating and premature brush wear.
KS-370 – 5V–12V DC 370 Brushed Motor
Model: KS-370 • Φ24.4mm × 30.8mm
High-speed brushed motor delivering up to 16,000 RPM at 12V. Ideal for RC cars, vending machines, and hobby projects. Nickel-plated shell available for enhanced corrosion resistance.
- 5V–12V DC
- 16,000 RPM max
- Φ24.4mm
- Nickel-plating option
3. Physical Dimensions and Design Characteristics
Spatial integration requires strict adherence to the housing dimensions and mounting interfaces. Most 370‑series motors use a cylindrical steel can with an outer diameter of 24.4 mm and a body length (excluding the output shaft) of 30.8 mm. The front face typically provides two M2 threaded mounting holes, although their spacing may vary slightly between manufacturers. The output shaft is commonly 2.0 mm in diameter (some versions offer 2.5 mm) and is made of hardened steel or stainless steel to withstand radial loads from gears or pulleys.
Internally, the motor employs a carbon‑metal composite brush system sliding on a multi‑segment copper commutator, ensuring stable electrical contact and reduced sparking at high speeds. The total mass is approximately 50 grams, making these motors attractive for weight‑sensitive designs. Heat dissipation relies mainly on natural convection through the steel shell; prolonged high‑current operation may require forced airflow or an external heat sink.
4. Dynamic Performance in Application
When used in remote‑controlled vehicles, servo mechanisms, or other actuation systems, the 370 motor rc motor experiences rapid acceleration, deceleration, and frequent direction reversals. Speed regulation under varying loads is governed by the internal armature resistance; as the mechanical load increases, the output speed drops proportionally. To maintain precise speed control, engineers often employ Pulse‑Width Modulation (PWM) drive circuits with switching frequencies between 10 kHz and 20 kHz. This frequency range helps minimise audible whine and provides smooth torque delivery. Dynamic balancing of the rotor during manufacturing keeps vibration and acoustic noise within acceptable limits for consumer‑facing equipment.
5. Selection Criteria and Engineering Considerations
Choosing the right 370‑series motor for a given application demands careful evaluation of electrical, mechanical, and environmental constraints. First, determine the worst‑case continuous current draw to prevent thermal overload and insulation breakdown. Next, compare the speed‑torque curves of candidate models against your load requirements. For high‑efficiency operation, select a winding that places your typical load near the peak‑efficiency region.
When sourcing 370 motors, verify dimensional tolerances, brush material, and winding resistance to ensure batch‑to‑batch consistency. Prototype testing under simulated duty cycles is essential to confirm that the chosen unit meets the expected service life before mass production. Ultimately, the best 370 motor brushed motor for your design is the one that matches your voltage, speed, torque, and current constraints while fitting within the available space and thermal budget.
KS-GM25-370 – High Torque 370 Brushed Gear Motor
Model: KS-GM25-370 • 25mm Series • Metal Gearbox
Precision-engineered high torque motor with durable metal gearbox. Flexible voltage options (6V / 12V / 24V) and gear ratios from 1:10 to 1:500. Encoder ready with OEM customization available.
- 6V / 12V / 24V DC
- Up to 15 kg.cm torque
- 1:10 – 1:500 gear ratio
- D-shaft / round shaft
- Encoder ready
6. Frequently Asked Questions
Can this motor be operated outside its recommended voltage rating?
Exceeding the maximum rated voltage accelerates brush wear and increases thermal stress on the armature windings, leading to premature failure. Operating below the minimum rated voltage may result in insufficient torque to overcome internal friction and load inertia.
How does PWM frequency affect motor performance?
Very low PWM frequencies can produce audible whining and uneven heating in the windings. Higher switching frequencies (e.g., 10–20 kHz) ensure smoother current flow, reduced electrical noise, and more consistent torque delivery across a wide speed range.
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