Nema 17 Heatsink Clamp

thingiverse

Clamp that snaps onto back of NEMA 17 stepper motor and holds a common 40x40x11mm passive aluminum heat sink (I used Amazon asin#B00REFPLVM, but much cheaper sources are available). The "legs" clip/snap onto the motor housing, and the top bars provide spring tension to hold the heat sink tightly against the motor. "Look Ma, No Screws!" Thermal paste will help with heat transfer, but is not absolutely needed as the heat sink is held pretty tightly against the motor. The "legs" include features to retain a tie-wrap if extra security is desired, however the clips work very well by themselves so the tie wrap isn't really needed in my experience. Sketchup design file included. Print Settings Printer Brand: LulzBot Printer: Mini Rafts: No Supports: No Resolution: 0.18mm Infill: 40% Notes: I printed with no supports, and only minor cleanup was needed for overhangs. Recommend using ABS or Nylon, as PLA may soften at high stepper motor temperatures. Note: For absolute best heat transfer, a drilled heat sink held with the motor screws is a better solution. But if you don't want to remove motor screws, or can't find longer screws, or simply don't have a drilled heat sink -- then this clamp will do the job. :-)