Extrusion hidden hole jig
thingiverse
Jig for drilling holes for hidden joints in 20mm aluminium extrusion. Ensures the hole is at right angles to the extrusion. Each jig has a pilot variant. This allows a 2mm pilot hole to be drilled before drilling the 4mm hole that allows a hex key to be used to tighten the bolts in the hidden joint. The `Extrusion_Drill_Jig_Corner` variant positions the holes correctly for making a corner joint between extrusions. There are holes for joining a 2020 extrusion with either 2020, 2040, 2060 or 2080 extrusion.
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