Stepper Motor - 68 oz.in (400 Steps/rev)

Thanks to RS for posting a link to a spec sheet ( [...] ) where we discover that this is a 3.06V motor. Unfortunately the Adafruit motor shield for the Arduino does not work with 3V motors.However that's not the fault of the product or the vendor (except perhaps for not having linked to the spec sheet themselves) and it looks like the motor performs to spec once you know what the spec is :-)

Massively confused...The number on the motor in item pic is 42BYGHM809. The item description says motor by Sparkfun. The item that comes up on review page says Jing Kong Motors. That's interesting, but none of this is accurate. The motors I received have part number JK42HM48-1684. I can find reference to this part on internet as being a Rio Rand motor.The motors I received were ordered from Karlsson Robotics. May be good motors, but info is crap.

I installed this stepper motor on my Solidoodle 3 to replace the extruder motor. Been using it for 2 weeks now and no complaints. It is 0.9 degrees per step so it has twice the precision of the old motor, which is excellent because the old motor would cause a moire pattern (surging extrusion) if the current was turned up too high. This motor powers through the extruder nicely, I almost never seen it skip, allowing you to print at a lower temperature if your extruder hot end is providing too much resistance to the filament.

Sturdy and well made!! Take into account that you can not connect these motors directly to your development board unless you want to see it in fire!! This motor requires 1.7 Amps and run at 3V. It does requires the proper coupling to provide the right voltage and current (power). It also requires a H bridge to invert rotation plus control unit for stepping to the right position.

Priced right and solved the problem of missed steps on my y-axis/ Runs quiet and cool.