DC 12V Reversible High Reduction Electric Motor 15-200RPM Outer Diameter 20MM(200RPM)

I ran it a a range of Voltages from 2.3v to 12v. No problems (yet). I plan to use it at 2.5v to 5v direct power though, I may do PWM from an Arduino. If I don't do PWM, I'll use a Switching Relay controlled from Arduino. I could Not hold the Shaft from turning at 2.3v...

I ordered a 30rpm, and a 100rpm motor. I hooked the 30rpm motor up to my variable DC power supply, set to 12V, and it worked great in either direction. It had quite a bit of torque too, and will be perfect for future projects. I did the same with the 100rpm, and it seems to be DOA. Started a return, and I am getting a replacement sent to me. Otherwise they seem like great compact motors. The 30rpm motor also ran very well at 9V which is great, because I plan on using a 9v battery to power it. Replacement was sent in 2 days, and it works fine, but it still sucks I had to go out of my way for a the return, but it happens.

half decent motors, good for the price but no useful for much in real life

I used this motor on two models; a Ferris wheel and a midway swing. They both worked very well probably more power than needed.

Motor was defective.

The shaft size is 4mm with a flat side. I am powering mine with 9 volts. It's a bit noisy but works great.

Fits and works in a golden key machine

After trying to get a 6v “high torque” micro motor to lift up my hamster elevator, I realized it would not pull the weight. I found this beauty running at 50 rpm and 12v the perfect solution and can handle the 400 grams I needed.

Worked great for me

Has terrific torque, but the vibration and sound from that is unbearable for my project

This is a beautiful little motor, excellent quality, a little loud at 12V (no more than others). It I never intended to run it full speed, it runs all the way down to 1 volt, at 2 volts it does 15rpm and I can barely stop it with my fingers, at 2.5 volts I can’t stop it, at 3.7 volts it runs at 31rpm, at 5 volts - 45 rpm, 12volts the full 100rpm, near silent below 6 volts

Not the quietest motor but it works. I used it to build an record cleaning jig for my ultrasonic cleaner. Turns 12 LPs without issue.

Fantastic little motor, strong gear box. Shipping is fast and on-time.