Wire Outer Insulation Cutter
by ShinyObjects, published
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I like to use the HolidayCoro's 3-wire connectors and wire for all my lights, but taking the outer insulation off at the ends takes time and I sometimes nick the insulation around the wires.
This insulation cutter uses an ordinary utility knife blade, which sticks up about 0.7 mm from the surface. This is just enough to cut through the outer insulation without cutting the insulation around the inner wires.
The blade slot is a bit thicker than the typical blade but putting a piece of electrical tape along one face gave it a nice snug fit that doesn't slip too easily. I used a small piece of wood to press on the blade edge to get it all the way down and even across the top.
To use it simply put the piece of wire on the table, put the cutter on top of it with the blade where you want the cut, and then push the cutter forward which will roll the wire while cutting.
There will likely be a little insulation left that didn't get cut, but simply bending the wire right at the cut should break free the remaining portion.
If you choose to cut the wire with the blade up, I'd recommend something other than your hand to roll the wire (like a piece of wood) to prevent cutting your fingers.
Because all utility blades may vary in size a little, you might need to add tape layers to adjust how far the blade sticks up.
9/13 - I added a cover for the cutter. I printed mine upright with a raft because it's pretty tall relative to the width. Alternately you could rotate it flat and use supports or let it bridge.
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Wire Outer Insulation Cutter by ShinyObjects is licensed under the Creative Commons - Attribution license.
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