Porcupine Spiral Featherboard
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Featherboard with a single knob, a single pivot point and a spiral-shaped body that easily adjusts for different widths.
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Model information
- Source
- Printables
- Category
- Tools
- License
- Creative Commons — Attribution
Woodworking with power tools is dangerous. Use this model at your own risk.
I use this porcupine featherboard to hold small boards while ripping on my tablesaw reducing the chance of kickback. The spiral shape closes as it turns clockwise, increasing pressure on the board as it tries to go backwards. The single knob, single pivot point and spiral-shaped body allows me to secure and adjust the featherboard from a single miter slot insert, easily turning to adjust for width of board.
For thicker boards, I would re-print the same model, but scaled up 150-200% in the z axis only.
The miter insert fits standard 3/8" x 3/4" miter slot. Insert a machine screw up through the anchor and feather board / jig, then tighten with a wingnut or knob to expand the anchor in the miter slot and secure the jig. The screw holes are sized for a SAE 10-24 flat head machine screw; adding an O-ring prevents the head turning / slipping when tightening from above. Glue a SAE size 10 nut into the knob to tighten.
I printed the featherboard part with a 0.8mm nozzle and 0.32mm (draft quality) layer height, took about 3 hours using a Crealty ender 3v2. Worked perfectly without any sanding or adjustment. The miter inserts take about 15 minutes with the same settings, and the knobs a little longer than that.