상식을 뛰어넘는 테이블 쏘 사용방법 / Cove Cutting jig / 목공 지그

I've done this, but only with a fence clamped across the table at 90 degrees. I thought it would be nice to do different angles, but have never taken the idea further. Your jig is beautiful, thanks so much for sharing!

Unbelievable! Genius! Thank you for taking the time & effort to produce this excellent, easy to follow & understand, video tutorial on how to make a cove jig for a table saw. I pity those who made previous comments that couldn't appreciate the creativity in your method - jealousy perhaps? Keep up the good work.

WOW OH WOW!! I just watched two of his/ your videos very impressive!!! The fact he/you still have ten complete fingers is even more impressive! I am a subscriber now!!

I have used this on thresholds to mach sure the board is resting on the flooring in the two rooms and not on any uneven concrete on the middle. Love the jig, makes it much easier than running clamps everywhere.

Beautiful jig. I love the hinge. Excellent design and craftsmanship.

I discovered this technique a few years ago, I had no jig! I love this jig. I will make it!

I thought I invented this technique a few months ago. I’ve been professionally using a table saw for 28 years now and I’d never seen anything like it but it was the only solution I could think of to make a trough shape I needed. Watching me use the saw this way seemed to stress out the other carpenters in the shop but you can feel the forces and as long as you don’t take a deep cut it’s fine. I raised the blade 2/3 of a turn each time. The math isn’t too complicated, a little basic trig and geometry. The cosine of the angle from the guide to the front of the table is (1/2 desired width of trough)/square root (radius of the blade squared minus(radius of the blade minus depth of the cut)squared). Draw out the blade and cut and write the above math as a standard formula and it will make sense. It can not kick back, nothing can bind against the blade. The people saying it’s not safe have not tried it. I’ve been building miniatures for 21 years, often using a table saw for much scarier operations than this and have all my fingers.

I learned this in 9th grade wood shop in 1974. Always have kept it in mind just never used it. Thanks for the reminder.

Excellent, excellent work! How I miss having a shop. I once turned out a corner piece for a bookcase using this method. I used a smaller diameter blade..around 6 inches..to get a tighter inside cove. Had a hard time convincing people it was created on a table saw!

And yet again after over 50 years in construction trades I see something new. Thank you I will use this SOON>

How do you know where to set the jig to start the cuts to have the cove fall dead center of the board?

Beautiful jig design. Anchoring to the fence is a great idea. The approach I took was to instead anchor to both T-slots, but I must admit that I like your result better. Oh well—the life of the carpenter is to always be using something that's less-than-ideal. Even Norm has probably used duct tape!

I have done this many times to make special molding in wood species where the mouldings or the profiles or sizes that I needed were not available. It works great and it is very safe as long as your fence is on the correct side of the rotation of the blade. Take incremental cuts and expect to do some sanding.

I learned this when I was 15. In 1985 with old saws. It was taught in wood shop.

WOW, what a great and simple idea. Well done

Diy homemade gutters !! Brilliant!

Unfortunately, there is no explanation as to what angle he is cutting to make the cove.

Nicely done on the fixture! Funny randomly running into your vid on the side bar. I was explaining cove cutting to a guy building snare drum shells. They usually cut mitres and glue up the flat sections into a circle. Then do all sorts of whacky stuff to get the inside of the drum shell rounded once glued up. So I suggested coving on a table saw with various size blades and angles of approach to get a variety of diameters. Wish I'd see your video to give them a good fixture set-up example. 👍🙂 I just did a 10" dia. cove but added smaller blades either side of the 10" blade to stiffen it up given the direct side loading.

Wow, learn something new everyday. Thank you for sharing.

To all the "I learned this in shop class 5 decades ago" "Norm Abrams" ( ie it's not impressive) folks: Knowledge you have isn't knowledge everyone else has. Creative vision is dynamic, broadly distributed, and highly variable in humans. In fact, many people who are in school today probably have knowledge you'll never have. It's almost as if there's an infinite number of facts and you can't have them all in your brain simultaneously. I know, none of this needs to be said, it's self evident. Well....