NEMA 17 Double Shear Housing
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A simple double-shear housing for an F695 bearing that bolts to a NEMA 17 stepper motor or mounting plate
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Model information
- Source
- Printables
- Category
- Other Printer Parts & Upgrades
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
This is a chonky little housing for an F695 (flanged) bearing which mounts directly (or through a mounting plate) to a NEMA 17 stepper motor, to provide additional shaft support when running higher belt tensions.
The bearing fitment is very tight, and that's intentional; make sure your filament shrinkage is calibrated properly, or you might have a bad time here. Use three button-head M3 screws to secure the F695 bearing once you've pressed it in, and use appropriate-length M3 socket-head screws to attach the housing to the stepper motor and mounting plate.
The STL is oriented correctly for printing; I suggest painting supports on the bearing flange surface.
Use a filament with good strength and layer adhesion, and I'd suggest 5-6 walls and 50% infill at the weakest here. If it's mounted directly to the motor (or depending on the operating current or chamber temperatures), remember that your filament will need to resist the heat, while also resisting creeping. (Annealed PET-CF/GF would probably be a good starting point for hot environments and higher operating currents.)
Check your measurements! You might need to open the belt path up a little bit, depending on the size of your pulleys and belt angles.