NEMA 42 Planetary Gearbox - 19mm Input Shaft, 10:1 Ratio, For 110 Flange Stepper Motors (High Torque Reduction)

Need serious torque for a big stepper motor? This is a NEMA 42 size planetary gearbox. It's built to mount onto stepper motors with a 110mm face (flange) pattern. The input shaft where your motor connects is 19mm in diameter, and the output shaft that does the work is 25mm. This specific listing is for a 10:1 reduction ratio (we offer other ratios too, like 3:1, 4:1, 5:1, and 7:1). What does 10:1 mean? It makes your motor's output speed 10 times slower, but the torque 10 times stronger! This one can handle a rated torque of 90 Nm and a whopping maximum torque of 180 Nm. It's built for precision with low backlash (≤8 arc-minutes) and runs efficiently (≥96%). It can take an input speed up to 5000 RPM, though 3000 RPM is the recommended continuous speed. It's made from metal (despite the confusing '100% Plastic' tag in the specs – that's likely an error) and is built tough for industrial use in CNC machines, automated equipment, or any project where you need to slow down a powerful motor and get massive turning force.