HKD DC Micro Motor 3.6VDC 25mm - Hobby Motor for Small Projects

Overview: HKD DC Micro Motor 3.6VDC 25mm

The HKD DC micro motor 3.6VDC 25mm is a small, low-voltage brushed motor commonly used in hobby electronics, small robots, micro gearboxes, and educational projects. With a nominal voltage of 3.6 VDC and a compact 25 mm body length (shaft and mounting variations differ by variant), this motor fits into tight spaces and pairs well with simple driver circuits, AA-battery packs or regulated bench supplies.

Why choose a 3.6V micro motor for hobby projects

• Easy to power from single-cell Li-ion/LiPo protection circuits or 3x AA (approx. 4.5 V) with simple current limiting.
• Suitable for small wheels, drive trains, micro pumps, and DIY gear reduction assemblies.
• Low cost and widely used in education and prototyping; replacement parts and shafts are commonly available.

Typical specifications (check product listing for exact variant)

Compatibility and common pairings

These motors are widely compatible with small H-bridge drivers (e.g., L293D, TB6612FNG), MOSFET-based motor drivers, and simple relay arrangements. For precise speed control, use PWM via a microcontroller (Arduino, ESP32). Popular accessory pairings include micro gearboxes, wheel hubs for 20-30 mm wheels, and pinion gears for small hobby gearboxes.

Selection Guidance: matching motor to your project

Start by defining the load: wheel diameter and desired speed, gearbox ratio (if any), and torque required to move your payload. Use these practical steps to choose the right variant of the HKD DC micro motor 3.6VDC 25mm.

Quick calculation examples

Example 1 - small wheeled robot: a 60 mm wheel at 0.5 m/s requires roughly 17 RPM per metre circumference. If wheel circumference is 0.188 m, target wheel RPM ~160 RPM. With a motor no-load speed of 12,000 RPM, a gearbox ratio of about 75:1 gives ~160 RPM output. Check gearbox torque vs. expected friction and incline loads.

Example 2 - simple pump: for continuous light-load use, ensure the motor runs below 70% of rated current at operating voltage to avoid overheating during extended runs.

Driver and power recommendations

• Use a motor driver that can handle at least 2x the expected stall current for short bursts.
• Add a flyback diode or choose an H-bridge with built-in suppression for brushed motors.
• For battery-powered builds, allow for voltage sag - a 3.6 V nominal motor will run faster from 4.2 V fully-charged LiPo; design speed/torque expectations accordingly.

Accessory bundles and compatibility notes

Useful bundles for hobbyists include motor + gearbox, motor + wheel adapter, and motor + driver PCB. Communica stocks compatible shafts, set-screw hubs, and small spur gears that match 2 mm shafts - verify shaft length and flat before ordering.

Local considerations - stock, pickup and invoicing

South African makers and students should check stock availability at the Samrand branch or other branches before project deadlines. Lead times can vary; for educational bulk purchases, request a quote to secure quantities and obtain a VAT invoice (Communica supports VAT invoicing for tertiary and business purchases). Branch collection is available where stock is listed as ready for pickup.

Troubleshooting and common issues

• Motor stalls or overheats: reduce duty cycle, add gearbox reduction, or increase driver current capacity.
• Excessive noise or vibration: check shaft runout, secure mounting, and balance attached wheels/gears.
• Intermittent operation: verify wiring, solder joints, and power supply stability; check brushes and commutator condition on older units.

Buy, Compare, or Request a Quote

Choose from single motors or kits with drivers and gearboxes. Shop Now to view current stock, Check Stock in Samrand for branch availability, Compare Specs to match speed/torque needs, or Request a Quote for bulk or educational orders.

Sources

• Communica Motors & Gearboxes category - Communica
• Branches & Trading Hours - Communica
• Brushed DC motor basics - Wikipedia