Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
Mechanical Motion Parts for Better Fit, Drive, and Alignment
The Metal Gear Shaft 20T 0.5mm is a practical motion hardware from Circuitrocks for students, makers, and repair-friendly builds. It fits well in projects that need mechanical fit and mounting, while keeping setup straightforward for testing and prototype work.
Compared with generic parts, this product stands out through details such as Metal gear build, 0.5mm. That makes it a solid choice for Arduino, ESP32, Raspberry Pi, robotics, motion-control, and workshop projects where matching the right part from the start saves time.
Important: Always match the electrical rating, size, and control method of this part with the rest of your setup before full-power testing.
Why you'll love it
- Metal gear build: better wear resistance and more confidence in higher-load movement
- 0.5mm: gives you a quick spec reference before choosing the right part
- Mechanical fit and alignment: adds useful value when choosing parts for a build
- Useful for custom assemblies: adds useful value when choosing parts for a build
- Supports motion-system builds: adds useful value when choosing parts for a build
What you can build
This product is a good fit for linear motion systems, brackets, shaft support, pulleys, couplers, and custom mechanical assemblies. It works especially well in student projects, quick repairs, and prototype builds where part availability, straightforward hookup, and predictable results matter.
Starter bundles
This works best when matched with the correct motors, shafts, brackets, bearings, belts, or fasteners already planned for your build.
Recommended add-ons
Common add-ons include matching shafts, bearings, pulleys, belts, couplers, and motor mounts. You can also compare it with Aluminum Flex Shaft Coupler - 5mm to 5mm for Stepper Motors, Aluminum Flex Shaft Coupler - 5mm to 8mm for Stepper Motors.
Comparison table
| Compared Product | Best For | Key Difference | Direct Link |
|---|---|---|---|
| Aluminum Flex Shaft Coupler - 5mm to 5mm for Stepper Motors | mechanical fit and mounting | 5mm | View product |
| Aluminum Flex Shaft Coupler - 5mm to 8mm for Stepper Motors | mechanical fit and mounting | 5mm, 8mm | View product |
| Aluminum Flex Shaft Coupler - 5mm to 10mm for Stepper Motors | mechanical fit and mounting | 5mm, 10mm | View product |
Technical specifications
| Product | Metal Gear Shaft 20T 0.5mm |
|---|---|
| Brand | Circuitrocks |
| Product Type | Motion Hardware |
| Category | Electrical Motors |
| Primary SKU | AN730 |
| Key Specs | 0.5mm, 20 tooth, 11.0 mm, 5.0 mm |
| Product URL | https://circuit.rocks/products/metal-gear-shaft-20t-0-5mm |
Pinout & power notes
This is a passive mechanical part, so there are no electrical pins to wire. Focus on shaft size, thread pitch, mounting hole spacing, and alignment in the final assembly.
What’s in the box
1 × Metal Gear Shaft 20T 0.5mm
Frequently Asked Questions
Can this work with Arduino or similar boards?
Yes, as long as the voltage, control method, and wiring match your controller and power supply.
Does this need electrical wiring?
No. These are passive or mixed-use parts, so fit, size, mounting, and included components are the main checks before use.
Is this good for student and prototype builds?
Yes. It fits well in testing, learning, and proof-of-concept projects when matched with the right support parts.
How do I choose the right one?
Check the hole size, shaft fit, thread pitch, spacing, and overall dimensions before ordering.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →