NEMA 17 Stepper Motor + Cork + Heatsink

grabcad

This assembly is commonly used on various models of 3D printers. The cork absorbs some of the vibrations from the motor, but only if the motor is not affixed too tightly. The 40 mm heatsink (plus a fan) prevents the motors from overheating and missing steps. It is advisable that the fan is mounted to pull air through the fins, which could also pulls a small amount of air through the opposite end of the motor and through the coils (depends on how the motor was designed). I use Arctic Alumina thermal adhesive to attach the heatsink to the motor, which works very well. If you need to remove the heatsink, just grab it and twist. Soaking the heatsink in acetone will loosen the adhesive enough to be removed with a razor. Acetone if flammable and corrosive....razors are sharp. YOU are response for your own safety!!! Use the proper personal protective equipment (PPE) to prevent personal injury, damage to equipment, or any other unwanted results. All of the heatsinks I have used, were obtained from old computers ( off the video processor). The #1 reason I drill am 8mm hole is to ensure that NO thermal adhesive enters the motor. Clean the heatsink and the EXTERIOR of the motor with acetone or isopropyl alcohol before using the thermal adhesive. This removes any oils from manufacturing and from your hands. DO NOT allow the alcohol, nor acetone to get inside the motor! This will destroy the bearing seals!!! Feel free to comment and ask any question!! If you have never used thermal adhesive, watch YouTube for advice on applying it. The NEMA 17 was originally obtained from pefozzy on Thinigverse...which I combined into a single part for the purpose of generating BOMs for various projects. (https://www.thingiverse.com/thing:185269 & http://www.thingiverse.com/thing:456025) The heatsink was originally obtained from Alan Bullick (Aluminum Chipset Heatsink (Black 40x40x11 mm) ).