Product introduction

The Closed Spur Gearhead N20 DC Gear Motor (IND-14GMN20) is a compact, high‑torque micro DC geared motor designed for applications that need stable speed reduction in a small footprint. By combining an N20 brushed DC motor with a closed straight‑cut spur gearhead, this unit helps protect the gear train from dust and handling damage while maintaining efficient power transmission. As part of our Spur Gear Motor series, it’s ideal for space‑limited designs such as smart locks, printers, robots, optical equipment, monitors, and precision instruments.

The gearhead supports a broad reduction ratio range from 5:1 to 380:1, allowing you to tune output speed and torque to match your mechanism. Need something special? This gear motor can be customized for your project, including shaft length/shape, operating voltage (2–14V DC), target RPM, output torque, lead wires or connectors, adding a gear/pinion on the shaft, and optional encoder integration. Whether you are building a low‑speed high‑torque drive or a faster micro gearbox solution, this closed spur gearmotor offers a practical balance of size, durability, and flexible configuration for OEM and prototyping needs.

Outline drawing

Customizable items: 1. Length and shape of shaft; 2. Voltage, output speed, torque, etc. ; 3. Adding connectors, lead wires; 4. Adding gears to shaft; 5. Adding encoder.

The basic parameters are for reference

Notes: These specs are samples. Please contact us to customize your parameters.

Gearbox sheet

FAQ for Closed Spur Gearhead N20 DC Gear Motor

Q1. What gear ratios are available for this N20 spur gear motor?

Standard ratios cover 5:1 to 380:1 (e.g., 5:1, 10:1, 20:1, 30:1, 50:1, 63:1, 100:1, 110:1, 150:1, 210:1, 250:1, 298:1, 380:1). Custom ratios can also be discussed for OEM projects.
Meta description: N20 spur gear motor gear ratio options from 5:1 to 380:1, including 50:1, 100:1, 150:1, 298:1 and 380:1. Custom ratios available.

Q2. Can you customize the N20 DC gear motor (shaft, connector, encoder)?

Yes. We support customization including shaft length/shape (D-shaft, round, long shaft), lead wires or connectors, adding a pinion gear on the output shaft, and optional encoder integration.
Meta description: Custom N20 DC gear motor available with shaft options, lead wires/connectors, pinion gear, and optional encoder for speed feedback and positioning.

Q3. What voltage does the closed spur gearhead motor support?

Typical operating voltage is 2–14V DC. Rated voltage is selected based on your required speed (RPM), torque, and duty cycle.
Meta description: Closed spur gearhead N20 DC gear motor supports 2–14V DC. Voltage can be matched to your target RPM, torque and application requirements.

Q4. What is the advantage of a “closed” spur gearhead?

A closed spur gearbox helps protect gears from dust and debris, improves handling reliability, and is well-suited for compact assemblies like smart locks, robotics, printers, and precision instruments.
Meta description: Closed spur gearhead design helps reduce dust contamination and improves durability for compact N20 gear motors used in smart locks, robots and printers.

Q5. How do I choose the best reduction ratio (e.g., 50:1 vs 150:1 vs 380:1)?

In general, higher ratios = lower output speed and higher output torque. For example, 50:1 is used for higher RPM applications, while 150:1–380:1 is chosen for lower speed, higher torque loads. Send your load, target RPM, voltage, and available space—we’ll recommend the best ratio.
Meta description: Choose N20 gear motor ratio by speed and torque needs: 50:1 for higher RPM, 150:1–380:1 for higher torque and lower speed. OEM support available.