Greartisan DC 12V 200RPM Gear Motor High Torque Electric Micro Speed Reduction Geared Motor Centric Output Shaft 37mm Diameter Gearbox

This is a good quality motor with gear drive that was recommended for my 3d filament spool winder. It works perfect.

I am using this for a Halloween prop where it hoists a spider (one of those 4 foot spiders you can buy at the Halloween stores) up to an overhanging branch on our front yard tree. The spider weighs about 13 oz and there is some friction in the system but the motor hoists the spider quite handily at about 0.5 m/s. It doesn't sound like it's struggling and stays cool. I'm controlling it through a Pololu motor driver and Arduino Nano and it seems to work fine with this setup. The motor makes a little noise but you can barely hear it out on the sidewalk. All in all very happy with this motor.

Well. So far. So good. I'm using this motor for a signaling Cannon I just finished putting together. It is raising and lowering the barrel. I wanted a motor with low RPM's and torque. This seems to be doing the job well at this point. If issues arise. I shall inform all who read.

as described by seller

Works perfectly! Much more powerful than I expected.

This is the third gear motor that I purchased for my projects. The two previous units worked well and were very quiet. This last purchase 20 RPM gear motor seems to be very noisy. It makes a grinding sound when the gearbox in unloaded. It appears to work properly except for the noise level.

This little guy is super tiny, yet an absolute BEAST. Manages to keep the 2.5 rpm (5rpm motor geared down to 2.5) while rotating the huge 26" diameter and over 30" long horn on my siren. 1/2 Scale ACA Hurricane MKII. $15 motor, comes to my door in like 2 days. Absolutely worth the money, great little motor. Uses M3 machine screws to mount it. With no load, it's pretty much silent. With a large load, it makes some noise but is still pretty quiet in general terms. When it's on the pole rotating the head, i can barely hear the motor at all. With the chopper running, it's literally impossible to hear this motor.

Just received the PEMENOL Motor Speed Controller. Hooked it up to a 30V 10 A DC power supply to check it out. Powered up fine when I got the power supply hooked up. The LED display is easy to read. The unit output is switched by the control knob by pushing it in. There's an LED above the knob to indicate on or off. The knob has smooth indents as you turn it, indicating the PW percentage on the LED display. It goes from 0 to 100. Don't know what the PWM frequency is. I didn't hook it up to my oscilloscope. I ultimately wanted to use the controller for a 24V gear motor, but I tried it on several other DC motors first. I tried a regular 6V DC motor it was able to control the motor very smoothly up to 100% modulation, except at really low pulse widths. Probably just too short of a voltage on time for DC motor dynamics, not a problem with the controller itself. Next I hooked up my 24V DC gear motor that runs nominally at 1000 rpm and 24VDC. The motor controller was able to again control the speed smoothly from about 15 to 100% modulation. Looks like it will work great for adding speed control between a fixed DC power supply and a lot of DC motors. Very useful and easy to connect.