
I bought this motor to replace a weak extruder motor on my Wanhao Duplicator i3 v2 which I recently upgraded to a RAMPS 1.4 board. I've been using it all weekend and so far it's working very well. I haven't had time to reinstall my flexion extruder kit after going back to building block with all metal upgrades, but this thing can definitely provide it. Not too loud (although it's not that loud next to the fans that came to Wanhao) and haven't had any blockages or skipped steps yet. I know the stock motor is 34mm, but the 6mm difference is negligible to me. , and the compromise in increased torque was worth it. One note though, I had to remove some metal from the heatsink to make it fit as the shaft is also slightly longer than stock. Also make sure you match the voltage as standard motors run at a much lower voltage than this.

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