Hey 3D printing folks, need a reliable stepper motor? This Nema 17 is a classic workhorse, perfect for extruders or other axis movements. Here are the specs you care about: It's a bipolar stepper with a 1.8-degree step angle. It puts out a holding torque of 16Ncm (or 22.6 oz.in) and runs at a rated current of 1.0A per phase. The body size is the standard 42mm x 42mm, with a length of 20mm. The shaft is 5mm in diameter and 20mm long (with a 16.5mm D-cut). It has 4 leads (wires) that are about 400mm long, colored Black(A+), Green(A-), Red(B+), Blue(B-). IMPORTANT: Don't plug this straight into a power supply! You gotta use it with a proper constant current or chopper drive controller (like on your 3D printer board), or you'll fry it. If you're replacing a burnt-out motor or doing a custom build, this is a solid, standard choice.
