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Electrical Knockout Fillers / Plugs - 1/2" to 2"
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Fully parametric knockout fillers with options for o-rings, TPU gasket, DIY or no gasket. Threaded for 3/8-UNC.
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Mechanical Parts
- Licencja
- Creative Commons — Attribution — Noncommercial
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Options provided for ½", ¾", 1", 1-¼", 1-½", 2" knockout holes. Simple prints that thread together perfectly, use the included nut, thumbwheel, or use your own 3/8-UNC nuts.
Dimensions:
- These are sized for standard KO's, but all dimensions are parameterized and available in the included Fusion 360 archive file.
- Threads are 3/8-16 UNC (Class 1 Clearance) with an additional 2.5 thou removed on every thread face on the stud and nut (total 5 thou if using provided printed nuts). At these dimensions threads run smoothly and the stud attachment fails before the threads do.
- O-ring seats are sized for 25% compression (although the stud will fail before the o-rings are fully compressed).
| KO Nominal Size | Actual Hole Size | O-Ring (AS568) | Overall Filler OD |
|---|---|---|---|
| ½" | 0.875" | -214 | 1.325" |
| ¾" | 1.115" | -219 | 1.637" |
| 1" | 1.362" | -223 | 1.950" |
| 1 - ¼" | 1.701" | -226 | 2.325" |
| 1 - ½" | 1.951" | -229 | 2.700" |
| 2" | 2.416" | -233 | 3.137" |
Special Instructions:
- Prints well with 0.40mm nozzle @ 0.2mm layer height, 15% infill. If you need a tighter seal, print at 100% infill so the stud is stronger and you can tighten it further.
- If you need the best possible seal, consider using RTV silicone or easily compressible foam. The TPU & Nitrile gaskets do compress and seal (as-tested), but cannot be tightly compressed without the printed stud failing.