Detailed plans available here:
https://kingsfinewoodworking.com/prod...

These are by far the strongest all wood clamps I’ve ever seen on YouTube. They are stronger than the deep reach clamps made by Matthias Wandel & John Heisz, (that was a challenge guys ). And mine don’t have any metal in them!

Here is the Tap & die set I used for this job:


You can make these 12” deep reach C-Clamps with amazing strength for only $10.00! I was about to buy some for a project but the quality ones I found were $107.00 online, so I did some research and decided to make mine.

I studied some material properties, and of all domestics, oak has the second highest modulus of elasticity behind only hickory. With over 1.8 million pounds/sq.in. Modulus of elasticity defines the relationship between stress and strain, and effectively measures stiffness. The exact property you want in the arm of a clamp. I also found a study done with Fine Woodworking Magazine & Case Western Reserve University in 2007 measuring glue bond strengths. It utilized 6 glue types and different species of wood, 162 joints tested in all. Among the domestics, red oak combined with type 1 PVA glue (Titebond), had by far the greatest bond strength.

So, it was a no-brainer. Oak, is cheap as a hardwood. You can buy #2 common, because narrow sizes are all that is needed. And, many people have oak offcuts hanging around.

I did buy a 36” maple dowel for the screw thread. It was a 1-1/2” diameter. You could certainly turn one. But for me this was easier. And one dowel makes 2 clamps.

I made 2 clamps with the intention of testing them to destruction, but I didn’t have a strong enough scale. After I get one and do that, I think I’ll make 10 for my shop, and I’ll have paid less than buying a single one online.

I did cut all the threads and tapped the clamp. This is easy to do.

Things used in this build:

Tools:
Empire Framing Square - https://amzn.to/3XRfnvX
Woodpeckers Ruler 24 Inch - https://amzn.to/3DBUsp2
Woodpeckers Ruler 12-Inch - https://amzn.to/3wneQ9B
6-Inch Compass - https://amzn.to/3ZVfQ25
Kreg Trak and Stops Kit - https://amzn.to/3ZVgnkB
Kreg Self-Adhesive Measuring Tape - https://amzn.to/3DGNpLU
Rockler Wood Glue Applicator Set - https://amzn.to/3ws9Ctc
Bessey 24" Parallel Clamp - https://amzn.to/3XOyl6u
1-1/8" Wood Scraper - https://amzn.to/3R2Xjgr

DEWALT Bar Clamp - https://amzn.to/3Rgtzgd
Woodpeckers Square 8-inch x 5-inch - https://amzn.to/401kV9k
Grizzly Jointer - https://amzn.to/3j09TAk
Combination Square Set 6" & 12" - https://amzn.to/3kB2jfW
Plastic Jig Dowel Thread Tap Kit - https://amzn.to/3HstRgH
Ridgid Handheld Belt Sander - https://amzn.to/3Js0UD1
Ridgid 5-Inch Random Orbit Sander - https://amzn.to/3JefhdM
Grizzly 12" Disc Sander - https://amzn.to/3wsbjH4
Grizzly Bandsaw - https://amzn.to/3XUUobR
Wood Glue Dispenser - https://amzn.to/3D94pKz
BOSCH 12 Inch Sliding Glide Miter Saw - https://amzn.to/3j331SU
SUIZAN Japanese Dozuki Dovetail Hand Saw 6 Inch Pull Saw Tenon Saw - https://amzn.to/3iZY2Cl
Ridgid Trim Router - https://amzn.to/3wmJOyz


Materials:
Titebond III Glue - https://amzn.to/3wvDDIh
WoodRiver Pure Tung Oil Quart - https://amzn.to/3kFDHm8
36 Grit Resin Cloth Aluminum Oxide Sanding Belt - https://amzn.to/3kEKH2P
Sandpaper Set 5-Inch - https://amzn.to/3Wygb7S
Dowel Rods Wood Sticks Wooden Dowel Rods - 1-1/2 x 36 - https://amzn.to/3XpExC9

As an Amazon Associate I earn from qualifying purchases.

Link to the KFW Community Woodworking group. Share pictures of your work & get help if needed. Join our Community Page. Woodworkers helping other woodworkers. Share advice, get project ideas. Free tips. Insider information. Get the best deals on lumber & tools:   / kingsfinewoodworkingcommunity  

Help support us through Patreon:   / kingsfinewoodworking  

Purchase plans on our website: https://kingsfinewoodworking.com/coll...

Please like and share our videos. Thank You!
We love teaching the world to do woodworking.

Detailed plans are available on my website if you are interested in duplicating these. http://kingsfinewoodworking.com

NOTE: Matthias Wandel, and John Heisz are both fantastic woodworkers. Very intelligent and very creative. If you haven't seen their work, you should definitely check out their channels.

Matthias Wandel:    / @matthiaswandel  
John Heisz:    / @ibuildit