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Cove Moldings on the Tablesaw & The Parallelogram Cove Jig

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Blog entry by thewoodwhisperer posted 559 days ago 2661 reads 10 times favorited 7 comments Add to Favorites Watch

Many people are surprised when they find out they can make incredibly beautiful (and large) coves moldings on the tablesaw. I know I was! In this episode, I’ll give you a rundown on the process for creating both symmetrical and asymmetrical coves. I’ll show you several ways to set up for this operation, but my favorite involves the use of a parallelogram jig that was inspired by a Fine Woodworking Article by Stuart Sabol (subscription required). His jig is primarily for setup only, so I figured why not make a jig that would also double as a fence system.

Once you have your coves cut, you’ll need to clean them up. Unfortunately the blade leaves a fairly rough surface. So I’ll show you a few good ways to smooth the surface to perfection.

And I didn’t mention it in the video, but the best blade for this type of operation would be one with a square tooth grind. That should leave you with the cleanest surface. My 40 tooth Forrest Woodworker II did a pretty decent job without any square teeth. And here is the link for the program cove calculation program over at FineWoodworking.com: Cove Angle Calculator

The Parallelogram Cove Jig
I made my jig from 3/4” Baltic Birch plywood and several parts from a Rockler Jig IT Hardware Kit. Here are the dimensions of the jig parts:

2 main rails – 54”L x 4”W
2 cross-rails – 13”L x 1.5”W
8 rail supports – 4”L x 2”W

Remember that none of these dimensions are in stone. You might might to make your jig longer, wider, taller, etc.

-- For free video tutorials and other cool woodworking stuff, check out http://www.TheWoodWhisperer.com



7 comments so far

View GrandpaLen's profile

GrandpaLen

1380 posts in 778 days


#1 posted 559 days ago

Great Tutorial Video and Jig build.

Thanks for sharing.

Work Safely and have Fun. – Grandpa Len

-- Mother Nature should be proud of what you've done with her tree. - Len ...just north of a stone's throw from the oHIo, river that is, in So. Indiana.

View nobuckle's profile

nobuckle

1120 posts in 1267 days


#2 posted 559 days ago

Most excellent Mark. Thanks for a very thorough explaination of using the TS to make cove moulding.

-- Doug - Make an effort to live by the slogan "We try harder"

View rando1's profile

rando1

163 posts in 1430 days


#3 posted 559 days ago

I used some of these techniques! And thanks for the tips….
How do I get tickets to that gun show??
Keep up the good work!

-- Randon Riegsecker, crosscutservices.com

View Roger's profile

Roger

13076 posts in 1310 days


#4 posted 555 days ago

Tis gr8 that your vids are now working for me. I look forward to seeing them.

-- Roger from KY. Work/Play/Travel Safe. Kentuk55@bellsouth.net

View AJswoodshop's profile

AJswoodshop

1057 posts in 782 days


#5 posted 544 days ago

Could you sand it by wrapping sandpaper around a dowel? I’m thinking the dowel would scratch the board, do you think it would work?

-- If I can do it.....so can you! -AJswoodshop

View Bruce's profile

Bruce

184 posts in 2281 days


#6 posted 500 days ago

Hi, Marc. I tried this a few years back and results were ok, BUT…my blade overheated and warped, also got a dark burn mark on my saw table where the hot sawdust exited the channel cut in the wood, not to mention all that sanding. I know you and others are probably thinking i took too big a bite out of the wood or my blade was dull or the angle was too cross-grained or all three. Nope. Anyways, was wondering if there were any others who had this experience.

-- I think of Jack Nicholson as the Joker in Batman when he says "Where does he get those wonderful toys" and ask WHERE DO U GUYS GET ALL THAT WONDERFUL WOOD?

View thewoodwhisperer's profile

thewoodwhisperer

601 posts in 2690 days


#7 posted 500 days ago

Well only thing left that I can think of is the blade itself. How many teeth? A rip blade would be ideal for something like this. Also, what species of wood were you working with. Some are easier to burn than others.

-- For free video tutorials and other cool woodworking stuff, check out http://www.TheWoodWhisperer.com

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