Make Cambered Cauls with a Thumbtack
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- Опубліковано 10 лип 2024
- A cambered caul is a clamping aid used to clamp across wide surfaces you couldn't normally reach with clamps. The idea is definitely not a new one and has been around for hundreds, if not thousands of years. But they're very difficult to make as you really want a nice shape that will apply even pressure along an entire surface. There are some that swear by the jointer method of creating cauls, but in this video I show how it's not nearly as effective as using a simple thumbtack.
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00:00 Intro
00:38 1. More about cambered caul
03:22 2. Thumbtack cauls
07:41 3. Testing for cambering
09:33 4. Credits - Навчання та стиль
you are up there with the geniuses
I really like how you explain and try to help us. You have shown some really handy tips. Thank you so much.
Very interesting results! Thanks for testing and tutorial, Rob! 😊
Stay safe there with your family! 🖖😊
Brilliant, Rob. Thanks.
Love it
Now that's smart.
Your intro and outro music remind me of the anime "Air Gear"
Nice video
I have the DeWalt job site table saw, which has a small fence. Can I just clamp a long sacrificial fence to the existing in order to get me the distance I need to start the cut if I am trying to make 30" cauls?
Yeah, I just don’t see being able to get the arc on the jointer. Would think that if anything, setting the exact center of the caul on the edge of the outfeed table for both cuts, you’d end up with a small uncut section right in the center. Couldn’t see it in the video, but the center should not have passed over the cutter either way, thus leaving an uncut portion. Even if it was uncentered, then you would cut the middle and basically just trued up the board. At least that’s what I’m thinking.
Rip three or four 1/4 thick strips. glue the strips and then clamp down the ends and use a screw at the middle to create a 1/16 concave.
The disadvantage of caul made of wood is that PVA glue will adhere. This is why a metal caul is preferable.
I just cover mine in packing tape, glue won't stick
Good idea, but I don't think that hand planes are so difficult to master. It would be great to show how quick it can be done with a hand plane, people would give it a try.
Funny, how a simple thing can be made complicated with machines. Just use a regular #4 or #5 hand plane, planing the full length of your cauls. This will automatically create the desired bow shape. Don't believe me - try it for yourself.
Paul Sellars would have this done in about 1 to 2 minutes with a No 4 soothing plane, if it takes him that long. . And the hand plane has at least a million other uses in the shop. Nicely done video, but overly complicated.