Portable Homemade Guide for Straight Vertical Jigsaw Cuts

Portable guide for straight vertical cutting with jigsaw

When cutting wood with the jigsaw, sometimes, more than what might seem normal, we find that the vertical cut is not straight at 90 degrees with the upper surface through which we follow the cutting line, but is crooked vertically. But with the portable woodworking guide to the keyhole saw Let's see, that problem is over.

I would say that the problem is that the blades of the jigsaw are quite flexible, and this allows them to bend to where the cut is easier, for example trying to follow the soft grain of the wood (or maybe there is another hidden reason 🙂, but I am satisfied with that view of the matter).

Now, with a bearing guide holding the bottom of the blade, I am going to be able to make perfectly vertical cuts. You know, something similar to what I already did for myself table jig saw and how much I use in my woodworking and DIY projects.


As the video is without comment, we are going to go into detail on how I made this DIY woodworking and carpentry guide.

glue plywood with super fast glue

First I made a 19cm deep by 24cm wide base, with 1cm thick plywood (measurements are for my jigsaw). And on top of this base I glue a narrow strip of plywood flush with the side of the base. I put the metal base of the jigsaw against that strip of plywood, and glue another narrow strip of plywood snugly against the metal base of the saw. To glue the plywood I use super fast glue.

lower vertical guide for jigsaw. to cut wood

So now I can cut a groove in the plywood base. Earlier I roughly felt where the blade will go when using this DIY woodworking guide. One of the advantages of this groove is that it fits perfectly with the cutting blade, so it will help to make a cleaner cut in the wood, as we saw in the trick for clean cuts with the jigsaw.

I also decided to glue a strip of plywood to the front of the fence (two pieces are visible on the front, but I think I should have glued a continuous strip). This will help to always put the saw in the same position and gives rigidity to the base in the area of ​​the groove.

I finish this base by drilling some holes in which I put hexagonal head screws. But since the hexagonal head goes at the bottom (the one that will slide on top of the wood we want to cut), I have to embed them in the wood. A few blows with the hammer and the help of a drift was enough. I like to call this technique carpentry precision ;).

fasten the jigsaw with screws, washers and wing nuts

So I can now hold the jig machine in place with the help of some washers and wing nuts. I could use regular nuts, but with wing nuts I can easily assemble and disassemble the saw in no time, depending on whether I need this guide or not.

I can already prepare the bearings. You know that I like to put a nylon plug and some washers to be able to fasten them with some wood screws. Something very easy to do if we have nylon plugs of the appropriate diameter. Those that have a flange at the entrance avoid having to put a washer in the entrance. So I just put the washer behind the bearing. I have to remember that For the bearing to rotate, the washer must be slightly larger than the inner ring of the bearing but slightly smaller than the outer bearing.

With a simple 45mm high wooden block and an 18mm thick strip of plywood I prepare the support for the bearings. But as we see in the pictures, I need to have the saw installed with its cutting blade, to put the plywood strip tucked just behind the cutting blade. That is why I first fasten the jigsaw, provisionally, with some screws.

Yes, I know, the moths. But it is that I actually did this before putting the screws with the wing nuts. For the rush to put the bearings first and see how this homemade woodworking guide turned out. But I think his thing would be to put the screws with the wing nuts first, as I show in this post.

And at most you ask: The cutting blade I use with the jigsaw measures 15cm from end to end. And I find them at the hardware store near home.

put the bearings on each side of the cutting blade

Now I screw one bearing on each side of the blade, making sure that the blade will be perfectly vertical. It is worth checking first that the metal base of the saw is also perfectly vertical with the cutting blade.

The metal base usually has grooves to adjust it at different angles to the cutting blade, but sometimes I need to force it a little with my hands to adjust it properly.

And I find that when I turn on the jigsaw the bearing bracket vibrates a lot. But I fix it by stiffening it with a vertical strip of plywood. And I fly to mount the bracket in place to finish this guide for perfect vertical cuts with the jigsaw for wood.

A test cut with the help of my edge guide for precise cuts… and there I have it, a perfect vertical cut with the jigsaw. Very useful for projects of DIY with wood when we are not comfortable working with more powerful tools such as circular saw hand.


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