homemade guide to cut wood straight with the jigsaw

Side guide to cut straight wood with precision with the jigsaw

Yes, I know that the jigsaw we just bought brings its own side guide, the same as any circular hand saw that we can buy. But they usually leave a lot to be desired. So I'm going to make a lateral guide, to cut wood straight and with precision with the jigsaw, which also serves to firmly hold the wood to be cut.

Best of all, we only need a piece of a piece of wood and some screws with washers. And if we want, also some small metal angles.

The jigsaw and the wood bits are supposed to already be there, but this makes sense.


How to make the side guide to cut straight with the jigsaw

The first thing is to make the lateral guide itself, which is nothing more than a very straight wooden strip on the edge of the workbench.

Metal angles to hold the back of the side guide

With a small wooden dowel I align the straight wooden slat with the edge of the workbench. And behind the slat I put, screwed against the tabletop, a metal angle at each end of that wooden slat. The function of these metal angles is that this slat that acts as a side guide rises and falls vertically in a slightly more precise way, so that it is easier to press it on top of the workpieces when used to clamp them.

To press the guide rail on top of the workpieces I am going to use something as simple as some long screws with washers. I start by drilling a couple of holes on each side of the guide rail. I make these holes with a bit thicker than the screws, since I want the screws to go loosely through those holes. And I drill two holes at each end because that way I have more flexibility when pressing wider or narrower pieces that I have to cut.

I now mark the position of the holes in the workbench tabletop and finish drilling the pilot holes in the workbench tabletop. workbench. But these holes are drilled with a wood bit a little thinner than the screws that will hold the edge guide.

I put a wooden board under the side guide for the jigsaw and tighten the screws to secure it. I put a 5mm plywood sheet on top of the wood board and against the side guide, and I mark the edge that goes against the side guide.

And keeping this sheet against the lateral guide, I cut it while I slide the jigsaw with its metal base against the lateral guide. So I get a strip of 5mm plywood sheet, which will serve as a guide to precisely position the wood that I want to cut straight under the side guide.

cutting guide is for precision cutting from the side guide

As I said, this plate helps me to position the wood to be cut under the lateral guide with great precision. And the fact is that the edge of that sheet marks me exactly the straight line along which the cutting blade of the jigsaw will go.

Therefore I have to adjust the wood to be cut so that the cutting line is adjusted inside or outside (depending on what interests me in each case) of the edge of that veneer.

And here I have it, a very precise, straight cut, right on the cut line that I had drawn on the wood. I don't believe that one woodworking guide For jigsaw as simple as this it works so well.

Trick for cleaner cuts without chipping with the jigsaw

Now I am going to see if I can improve the cut I make in the wood with the jigsaw. So I'm going to try a simple trick to cut wood without splintering with the jigsaw.

With a cutter, using the plywood sheet as a guide, I am going to make a cut in the surface of the wood that I want to cut straight. Above the cut line it does not look good, so we can see in one of the photos how the mark is left by the cutter on the wood.

cutting wood at an angle with the jigsaw

And as we can see in the photo, it is very easy to adjust the position of the wood to cut it at any angle with the jigsaw.

Well, the result is a cleaner cut with virtually no splintering of the wood. But while at the beginning of the cut I made a precise cut, at the end it seems that I deviated a bit.

It also turns out that the vertical cut did not stay perfectly vertical, and we can see that in the end the cutter blade was twisted vertically. A problem with the jigsaw that is quite typical.

But as you already know, I have a curious portable guide with bearings with which the cutting blade remains perfectly vertical throughout the cutting of the wood.


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