Review on Torque Bipolar Stepper Motor Extruder by Chef Deane

I buy these steppers, this model and the next smaller NEMA 17 from the same manufacturer and am very happy with them. Their micro step and full step torque is great, the bearings are good quality, the servos work with the right gauge and wire type. I am currently using it to drive a 15kg aluminum bed (with a direct drive T8x8 acme lead screw that has just been converted to 1/16th pitch) for a large printer I have built. It is very beautiful to say the least. Overall, these devices are of high quality and appear to be reliable. My latest block has about a million turns (after some quick math) and shows no signs of bearing problems, shaft play, or any other empirically measurable deterioration. I replaced it with this one to get some more torque.