STEPPERONLINE Stepper Motor Nema 17 Bipolar 40mm 64oz.in(45Ncm) 2A 4 Lead 3D Printer Hobby CNC

I bought this motor is replace the weak extruder motor on my Wanhao Duplicator i3 v2 that I recently changed to a RAMPS 1.4 board. I've been using it all weekend, and so far everything is working out pretty good. I haven't gotten around to reinstalling my Flexion extruder kit back on after changing back to the stock block with the all-metal upgrades, but this thing can definitely power that. Not that noisy (although nothing is that noisy when sitting next to the fans that came on the Wanhao), and haven't had any clogs or skipped steps yet. I know the stock motor is 34mm, but a 6mm difference is negligible for me, and the tradeoff in torque gain was worth it. One note though, I had to remove some metal from the heatsink to make it fit, since the shaft is a bit longer than stock as well. Also, be sure to adjust your voltage, because the stock motors run at a pretty significantly lower voltage than these.

Great stepper for the RoBo 3D I built a clone and these motors work great with the RAMPS and default drivers. The wires are plenty long enough, and although I would have loved a connector at the motor itself, I can always add one myself. No issues with drift or double-stepping. Plenty strong enough for all 5 motors of my machine.

I use a lot of stepper motors and I've never had an issue with these. They work well with every driver I've used them with and the threading and dimensions are always very accurate for installation in a variety of projects.

This product was good at first but it didn't fit my need of precision. It will miss steps in both directions and the momentum of a rotation can cause it to "bounce" back and forth before it completely stops. No other problems and it worked as expected.

These motors appeared fine for a short time on a DIY Arduino project. Then they began to vibrate and the spindle would only go back and forth. As this motor does not have a removable connector wire harness I cannot change out the wires. I would look at NEMA motors that have plug in connectors on the side of the motor.