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.

Needed a cheap stepper motor to test a new driver IC eval board. It's working with no issues

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.

As others have stated, they pull a ton of current. I'm safely using L298 units to drive this stepper with regulated voltage and current. When I tried with unregulated power, my poor H-bridge almost got toasted. The motors work as intended now.

Perfect

This motor is a beast. Using it on my Wanhao DI3. With a Flexion HT extruder. With the torque that this motor provides, i am able to tighten the jam nut much tighter than what i would before. Print quality and torque are very noticeable. Had to adjust stepper driver for 1.44v. The motor is a beast.

I ordered two of these to replace my Z motors on a RepRapGuru I3 machine. Only one motor was bad, but figured it would be best to replace as a matched pair and pull the good one aside for a standby replacement for any other failures.They were a bolt-up, drop in replacement for the stock motors. Though, this item has a higher amperage rating and slightly higher torque, so I can under-drive them a little an lose nothing in the trade.

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.