Hydroponic NFT Hole Resizer
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Made the holes too small in your NFT hydroponic rail? Want them to be 2 inches, not 1.75?
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- Printables
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- Tools
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I have 5 NFT hydropnic rails, and made one with smaller holes thinking this was a clever idea, so I could skip the net cups. And then I found out why standards exist.
Making a hole larger and keeping it circular is hard with all the tools I have at hand, so I designed a little jig that will securely hold a 2 inch hole saw in place while I make the holes into my standard size. You can't really do this by hand, and I didn't want to extract all the plants to move the rail to my drill press, where I could also have done this.
This is designed for the large side of a 3 inch x 4 inch US-sized vinyl downspout. It hold across the rail, and assumes all the holes you already made are pretty close to center. If they aren't, this will make non-round holes.
There's sufficient space between the jig and the rail to allow for the saw teeth's kerf. I suggest putting it in from the bottom, and then attaching it to the drill.
This isn't designed to be durable, but I only have to use it 16 times…