Introduction: Shop Made Angle Clamps

A square is an invaluable tool to make sure your marks and cuts are really square. But often this is not enough. You have to make sure your workpiece stays square during assembly. To solve this problem I built my own angle clamps. They are actually very easy to make.

Step 1: Cut the Squares

Picture of Cut the Squares

First I'm cutting squares. I'm using 27mm (1") ply wood for this. I made mine 23x23cm, but you can make them any size, depending on your needs. The only really important thing is to make sure they are really square.

Step 2: Holes for the Clamps

Picture of Holes for the Clamps

We need a way to fasten the angle clamps to the workpiece. Therefore I'm drilling two holes with a 38mm diameter into each clamp. This makes it possible to use ordinary clamps to fasten to the workpiece.

Step 3: Sanding

Picture of Sanding

This if of course optional. But if you plan to use the angle clamps often, sanding off the rough edges makes the handling much more comfortable.

Step 4: Ready to Use

That's it! It took me less than an hour to make this angle clamps. They turned out to be a real time saver. Each angle clamp acts as an extra hand which makes sure things stay square until they are glued up or screwed together.

Sometimes I even use them as part of the final workpiece and fix them with some screws. And of course make some new ones immediately.


jolshefsky (author)2015-04-09

One thing that might be cool would be to cut notches by drilling down the hypotenuse with a forstner bit perpendicular to the nearest side. That way the bottom of the hole would be flat. Although your design offers the possibility of anchoring on the hypotenuse ... maybe a 30°-60°-90° version as well as a 45° would be handy. For that matter, you can make a clamp for any angle you can cut.

ernstp (author)jolshefsky2015-04-09

Interessting thoughts. Drilling down is an good idea! I'll try that the next time I have to make some more. And yes, you definitely make them any angle you need.

BeachsideHank (author)2015-04-04

These are very handy to have, and oftentimes scrap will suffice. A notch is another variation on the clamping hold:

b.steadman (author)2015-04-10

Such a simple but effective solution. Thank you.

Going to make to some shortly.

Gartholameau (author)2015-04-09

Wonderful idea. I just love simple, brilliant shop tips. This is definitly being added to my workshop.

banman11 (author)2015-04-09

Great and simple thank you very much.:-)

tony_berumen (author)2015-04-09

great idea, thank you. I'm very courious about your table saw. I saw that you pulled the blade under your work piece. Where can I find out more about it?

ernstp (author)tony_berumen2015-04-09

It's a Festool Precisio CS 50 ( The pulling function is very common for European table saws. And it's the reason why most woodworkers in Europe don't need a miter saw.

jreidy1 (author)2015-04-09

Elegantly simple.

charlessenf-gm (author)2015-04-09


I don't take my wedding band off either - prefer to keep the wife!

Relieve the 'apex?' Chamfer the pointy bit that fits the inside corner a bit.

I have a MORTIZER ATTACHMENT for the drill press and it would allow me to 'drill' flat-bottom clamp holes w/o trying to drill down a(n) hypotenuse (Whatever that is!)

BIVS2000 (author)2015-04-09

Great idea Ernst!

But I have to ask you where you live? The reason I ask is that I have never seen a table saw like that.

dontno (author)2015-04-09

It never ceases to amaze me how people have a total disregard for basic shop safety standards while operating power tools. 1). Sleeves rolled up. 2). No rings, watches, or jewelry, safety glasses, etc. Please practice safety standards while using power tools. All it takes is once to be a life changer.

dmadam (author)2015-04-09

Great simple I wish I had thought of it! Oh well. I sure could have used this earlier.

silkier (author)2015-04-09

I love the simplest things, they make instructables one of the more satisfying sites to visit.

Thank you ernstp.

diy-master (author)2015-04-09

Great idea.

roughingitsmoothly (author)2015-04-05

Like this a lot!

DennisS4 (author)2015-04-04

Great idea! The holes are a really idea, and as a previous post stated notches would be an excellent addition. Thanks for sharing!

kylegilbert (author)2015-04-04

Great idea.

-BALES- (author)2015-04-04

Nice. I use mine all the time.

seamster (author)2015-04-04

Very nice, I've needed to make some of these for a while. Thank you for sharing the details of how you made yours!

About This Instructable




Bio: Maker, Youtuber, Software Developer
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