Make Your Own Wooden C-Clamp! | DIY Woodworking Tools #2





Introduction: Make Your Own Wooden C-Clamp! | DIY Woodworking Tools #2

About: -----------------------------------------------------------------15 year old, sick with a deadly disease called DIY-itis!-----------------------------------------------------------------Hi FTC! My I'bles con...

C-Clamps are so expensive! Did you see that price tag last time you were at the store?

I don't have a very big budget for projects, So I make most of my tools. That's why I'm going to show you how to make a perfect woodworking C-Clamp, Using only hand tools! What's better than making an extremely useful hand tool with only hand tools? :)

Let's get started!

Step 1: What You'll Need:


A Bolt (Use a long bolt for making a big C-Clamp, And a short bolt for a small C-Clamp)

2 Identical Hex-Nuts (That fit on the bolt)

Several "Flat-Headed" Wood Screws (I used 2 for the small clamp, And 3 for the big clamp)

A 3.5 x 3 x 3.5cm Piece of Hardwood (I don't know the name of what I used)

2 Pieces of 1.8 x 3 x 7.5cm of Hardwood (Same... I don't know the name of what I used)

1.5cm Dowel (optional)


Wood Glue (Optional)

Varnish (Or Lacquer)

CG-90 (Or Grease)

3mm Metal Rod (Salvaged from a printer)


Homemade Plywood Mallet

A Countersink Bit (Optional)


A Back-Saw (A Miter-Saw would have been great...)

5mm Chisel

A Pencil or Pen

Epoxy Mixing Stick

Sandpaper (Grits I used: 66, 180, & 600)

Paintbrush (If you use Varnish)

Drill-Bits: 2, 3, & 6mm

1 or 2 Clamps (Optional, But they help a lot)

Hammer (Optional)

Electric/Power Tools:



Why: Make your own wooden C-Clamp! They're so expensive to buy...

Protection Gear Needed: Respirator & Ventilated Environment

Cost (for me): FREE!

Needed Skills: Drilling, Chiseling,

Approximate Time: 2 Hours (It really depends on what tools you have...)

Step 2: Cutting the Wood to Size

To make a wooden C-Clamp, You obviously need wood...

I used some really hard wood that I had laying around, Which I unfortunately don't know what kind it is

I clamped the wood in my vise, And cut it to size with a backsaw, As shown in the picture. The dimensions are:

One piece of 3.5 x 3 x 3.5cm & Two Pieces of 1.8 x 3 x 7.5cm

Step 3: Drill a Hole in the Wood

I drilled a hole in one of the 1.8 x 3 x 7.5cm pieces of wood. While the size of the drill-bit doesn't really matter (You'll see soon why), I do recommend keeping around a centimeter or two from the edge (~0.4" to 0.8 Inches)

Step 4: Mark, Chisel the Hole, & Add Epoxy

First, Start by marking the outline of one of the Hex-Nuts (Because they're both identical) around the hole. Make sure that the Hex-Nut is centered exactly over the hole

After that, I used a 5mm Chisel and My Homemade Plywood Mallet to chisel out the shape of the Nut in the wood. The depth of the hole should be chiseled to the exact height of both of the Hex-Nuts when they're stacked on top of each other

Lastly, I mixed up some 2-Part Epoxy, Made sure that all of the insides of the hole were covered, And placed the Hex-Nuts inside.

Step 5: Drill a Hole in the Bolt

While letting the Epoxy dry, I clamped the bolt in my vise, And drilled a hole with a 3mm drill-bit into the bolt. This looks like an incredible task without a Drill-Press, But I did it! (Hint hint: It isn't)

If you use a bolt with a bigger head, It would probably be best to drill into the head.

Step 6: Making the Clamp's Body- Part 1: Drilling

It's a bit hard to explain this, But I put the wood together in a "C" way, And drilled Pilot Holes for the screws that I wanted to put in. I positioned a screw on each side, Making it possible to have a screw head on each side. I drilled two pilot holes, Because I wanted to put in two screws

Although I didn't do it in this clamp, I did Countersink the the holes in my second C-Clamp. Learn from your mistakes! On the second clamp, I also put three screws, Just to make sure they it was strong enough

Step 7: Making the Clamp's Body- Part 2: Glue & Screw

"Glue & Screw" The English language sure has weird rhymes...

I added wood glue between the connections, But that is optional. Before screwing in the screws, I clamped up the wood tightly in some clamps, And then screwed them in. This helps reduce the risk of having the wood pop and crack

Step 8: Making the Handle

I made a different handle for each clamp:

For the first clamp, I cut a small piece of dowel, Drilled a hole in the middle, Slid a 3mm metal rod through the hole, And attached the dowels to each end. They hold tightly enough without glue

For the second clamp, I took another 3mm metal rod, And bent it in my bench-vise. Both of the designs are pretty easy to use

I also added some CG-90 grease spray to the screw and the nut, Which makes it easier to use: "like butter"

Step 9: Sanding & Adding Varnish (Or Lacquer)

After planing the edges a bit with a rasp planer (To get a "routered look") I started sanding the clamp with 60 Grit sandpaper, And several minutes later, I moved on to 180 Grit.

I applied the first coat of varnish, Waited 2 hours*, Sanded a bit with 600 Grit Sandpaper, And applied the second coat. The sandpaper helps smooth it out and the Varnish adds protection

*I did this according to the instructions

Warning:Although the Varnish I used didn't have a strong smell (when compared to others), Always apply finishes in a ventilated area. While sanding, It is also recommended to use a dust mask or a respirator

Step 10: DONE: in Use & Storage!

As you can see in the pictures, Not only are they awesome, But were also FREE, Meaning that... Well... They're Awesome!


Don't forget to Follow me on Instructables, I have over 60 Instructables that I'm sure you'd like!

And Votes... Are always appreciated :) Thanks!

While you're at it, Why not make another one?



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    19 Discussions

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    Come-on, Let's make something!

    Now I've seen some Beech wood and it looks very similar-- I'm confused!

    no offense on workmanship but this has no practical use as clamp, i doubt it will bear large bending moment and direct load

    6 replies

    Seems to me that if all you want is a clamp to hold something together long enough to let the glue set this should do just fine. I think I will make mine with T-nuts.

    Cool, I've never heard of "T-Nuts", So I googled it and saw a picture...

    Are you just going to hammer them into the wood?

    Yes. All you do is drill a hole that is just large enough to fit the shank of the nut and the spikes hold it in when you hammer it in. You have a built in washer to bare the load. They are way simpler to use.

    Is the shank part the threaded part? I've never heard of that word

    Hammer what?

    Yes. If you look at the picture of a T-nut you will see a flat disk with spikes on the end of a threaded tube. That threaded tube is what I called a "shank". I may have used the wrong word for that tube. You drill a hole that is just big enough for that tube to just fit. The flat part is just like a head of a nail. You can hammer it down or take a screw and screw it down from the other side of the wood and pull it down into place.

    I had a pretty long reply, But I decided to shorten it a bit...

    The only two question I have is "How do you know? Did you make it?" No...

    The wood I used is extremely strong (I repeat: EXTREMELY!), And I tightened it incredibly strong with the screws, Thus making it almost impossible to break.

    I obviously won't be using it to tighten things with a ton of force, For that I have a 4" steel C-Clamp. Even if it breaks in a couple years, I enjoyed making it, And learnt a lot in the process :)


    2 years ago

    Well done yonatan24.

    I'm sure you enjoyed trying different ones trying to improve it

    Keep it up Chee

    1 reply


    Two days ago I tried to make my third one, But I cut the wood to the wrong length. I've now run out of wood...


    I have built many such clamps over the years whenever I needed an unusual size or shape clamp. I've discovered you don't need nuts or T-nuts at all! Drill and thread the wood itself.

    3 replies


    Does the wood still hold the nut when under pressure (While clamping)?

    heheheh I should have put a ' . ' after 2/10. I meant that I rated the clamp low. I wanna my my own clamps but like.. this is not it haha

    I still don't understand what you mean...

    If you don't have this type of wood, You can probably use aluminum or steel, With the same method like here.

    I wanted to make them out of metal, But I don't have a welder, And the metal that is needed :(

    You should consider using tee nuts so you can tighten it more without it snapping like a twig or ripping away the threads

    1 reply

    joen Mentioned it before, But I don't have any T-Nuts :(

    I still like it this way, It is really strong

    that's cool. take your clamp to strength of materials lab do some test. and clear super thunderbolts doubt.

    1 reply