270:1 Metal DC Geared-Down Motor 37Dx72.5L mm 6V/12V, with 64 CPR Encoder and Bracket. 6V-3W-20RPM-40 kg.cm(556 oz.in), 12V-6W-40RPM-70 kg.cm(972 oz.in), D-Shaped Output Shaft 16mm.

Perfect for our kitchen

Used to roll up a coolaroo sunshade. Works nice!

The media could not be loaded. I tested this using the sketch in the Wiki listed in the product description. The first few declarations are all smashed together so you have to do a little copy and paste to get it to run properly, but it does do what it says. It will give you a running output from the motor encoder to the Arduino serial monitor. You can unplug the motor (as I did in the screen shot) and see the changes in the encoder output as the motor slows down after losing power. In order to actually do something with this, you'll need a motor controller board. There is plenty of online tutorials to guide you through that if you are new to this. Be certain to heed the warning about keeping mounting screws to 3mm of penetration.Lots of power in a small package. Works as advertised-recommended.If this review was of use to you, please consider clicking on "helpful". Thanks.

I ordered this particular motor for a robotics project, because I needed a motor with more torque than my stepper motors could provide. CQRobot's wiki had the information on how to interface an Arduino to this motor, which made controlling it easy. Mounting flange and screws were provided.The motor does have a lot of inertia, and the wiki made it clear that the motor does not stop instantly when you remove power, but you can use your controller to watch the output of the encoder to see how much movement happens, and compensate within your controller software by either gradually reducing power or removing power a bit early, to get it to stop where you want it to.Hope this was helpful.

It's a hobby and purely experimental investment. That's what I told my wife after she opened it. I haven't discussed the ball screw.The electromotive sophistication at this price is stunning. There's more torque here than I expected at 12v. I'm thinking of applications. I have ideas. How much can it actually lift before stall? To be continued ...I've already got my money's worth in entertainment and quality thinking.

I’m going to try to make a high-power RC servo with this unit, because it includes the motor, gearbox and encoder. I’m going to use an Arduino for the processing.

Like all CQRobot products this one is well documented. Head over to their excellent wiki, search for its SKU "CQR37D", and you can find all sorts of information about it and some sample code to use with arduino.It's a really nice motor with a lot of torque. It runs really well and it's a lot better documented than most motors I've picked up in the past. Like most CQRobot products I'd recommend it in a heartbeat -- it's a good brand with solid parts.