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I had always though that it would be useless to make a jigsaw table. I new it would be easy to attach a jigsaw under a plywood board, but I always thought it would be very difficult to use it to cut any workpiece. Mainly because it would be very difficult to hold the workpiece against table board. But it was great to discover that I was mistaken.
When I think about how to attach the jigsaw under a plywood board, I know I want a system that makes it easy to attach it to the board. But it must also be easy to dismantle it when I need to use it freehand. So, I will use some bolts and nuts. But instead of self-locking nuts, I decided to use spring lock washers and wingnuts. The bolt in the picture is 4cm long and 6mm in diameter. The big washer is 3cm in diameter. And because that washer has a big hole, I also use a smaller washer that will be the base for the spring lock washers.
I glue some 3mm thick mdf pieces below the plywood board. These are to lock the jigsaw base so it doesn’t move back, to the sides or to the front. They are also useful as a guide to make the first cut in the plywood board. And they are great so I can always put the jigsaw exactly in the same position when I uninstall and then I install it again.
The plywood board I use is 15mm thick, 60cm long and 30cm wide. And I screw it to two 65cm long strips. These are 3x7cm, and I had them in my shop. Not even had to cut them.
You can watch in the video how easy it was to attach a jigsaw to the plywood board, to make a jigsaw table. But I should be more careful when I positioned the jigsaw on the plywood surface, because it looks like it is not perfectly parallel to the board sides.
Now it is very easy to attach the jigsaw under the plywood board. I just have to slide the metallic base between the mdf sheets, until I reach the drill hole that I use to install the blade (as you can watch in the video). I install the blade, and then I keep pushing until the metallic base reaches the stop block. I put the washers on the metallic base and I tighten the wingnuts.
And now, to take the jigsaw away, I just have to follow the same steps backwards: I loosen the wingnuts, I slide the jigsaw back some centimetres, I take the blade away and I slide the saw until I take it away.
When I used this jigsaw table for the first time it was a surprise how nice it cuts. And the workpiece doesn’t jump too much, so it is easy to hold it while I cut. I just have to press the workpiece against the board, but I don’t need to press it very hard. And I don’t have to push forwards hard to cut the workpiece, neither. I get a clean cut, and quite vertical, too. At least it cuts more vertical than when I cut freehand. Later I made a guide to make sure I always make vertical cuts (follow the link to watch the video in my woodworking channel in YouTube).
Because the jigsaw blade fits perfectly in the slot in the 15mm thick plywood, the plywood helps to keep the blade vertical. It is very easy to cross-cut 3cm thick pine strips with this jigsaw table. But as expected, it is more difficult to cut the end grain, so it is quite difficult to rip a board using this saw. And if you are afraid of the workpiece jumping while you try to cut it, you can watch the video to see what happens if I release the workpiece while I cut.