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Tapered Sliding Dovetail Slot Jig

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Project by Bricofleur posted 648 days ago 4388 views 17 times favorited 12 comments Add to Favorites Watch

If you know that driving a long sliding dovetail pin into a long sliding dovetail slot is difficult, you’ll like my new jig.

To fabricate my tapered sliding dovetail slot jig I used a 7mm HDF (High Density Fiberboard) laminated floor board because it is slick, durable and rigid. The final dimensions are 6-3/4’’ par 46’’.

At one end the width of the slot is 1’’ while the other is 1-1/8’’ over 39” long.

To use the jig, you must install a dovetail bit and a 1’’ guide bushing in the router and center the jig on the center line of the sliding dovetail slot to become. The narrow side of this latter should be at the front of the project. The slot is done in two successive passes. Therefore, the male part of the sliding dovetail will easily glide in the tapered slot!

Thanks for looking and I hope you like it.

Find all construction details and more photos on this page of my blog.

Best

Serge

http://atelierdubricoleur.wordpress.com

-- Learn from yesterday, work today and enjoy success tomorrow. -- http://atelierdubricoleur.wordpress.com





12 comments so far

View AJswoodshop's profile

AJswoodshop

1057 posts in 908 days


#1 posted 648 days ago

Very cool Serge! I’m sure it will make the routing easier.

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

View DIYaholic's profile

DIYaholic

13300 posts in 1306 days


#2 posted 648 days ago

That is an ingenious jig!
Now I NEED to find a need for it!!! I’ll think of something…....

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

View casual1carpenter's profile

casual1carpenter

353 posts in 1107 days


#3 posted 647 days ago

Serge, being the dope that I am I gotta ask, does the pin get tapered also? DIYaholic it is an ingenious jig!

View Bricofleur's profile

Bricofleur

1129 posts in 1824 days


#4 posted 647 days ago

@casual1carpenter: Only long sliding dovetails need tapered pins (ex. breadboards) since both ends are shown. In carcasses (ex. shelves), no need to taper the pins if the narrow end is in the front. The back gap, what is usually hidden behind a panel or plywood, can be left open.

@AJswoodshop: It is not the routing that is easy, it’s drving the pin in the slot!

Best,

Serge

http://atelierdubricoleur.wordpress.com

-- Learn from yesterday, work today and enjoy success tomorrow. -- http://atelierdubricoleur.wordpress.com

View casual1carpenter's profile

casual1carpenter

353 posts in 1107 days


#5 posted 647 days ago

Serge, The long sliding dovetail was what I had in mind to attach a trestle tables leg set to the table top where it would additionally provide stiffening to hopefully limit minor cupping type movement yet allow linear expansion / contraction seasonal movement. Sorry I know there is a name for the member I am trying to describe but I haven’t a clue as too what it is, only that I would like it there. LOL The dovetail is not necessary as there are other methods to accomplish this but it was an interesting thought if the accuracy and placement could be achieved. Your jig idea does handle the tapered slot side efficiently, easily and accurately.

View a1Jim's profile (online now)

a1Jim

112015 posts in 2209 days


#6 posted 647 days ago

Great idea Serge and a easy jig to make.
I know Serge will answer you,but my thoughts are that you don’t need a tapered sliding dovetail just a sliding dovetail, it’s perfect for the application your talking about provided you have some cross bracing.

-- http://artisticwoodstudio.com Custom furniture

View Bricofleur's profile

Bricofleur

1129 posts in 1824 days


#7 posted 645 days ago

@casual1carpenter: Jim has the answer. If you want or need a very tight joint along the full length, you better taper the pin as well. I would for a breadboard (because it shows), but not for a shelf, as already mentioned. I like using tapered sliding dovetails on long joints only. For short joints, sliding the pin in easy.

However, tapering a pin is easy: After milling the pin, stick a thin shim flush to the end of one face and make a second pass, keeping the shim against the fence of the router table. The tapered end will be equivalent to the thickness of you shim.

Best,

Serge

http://atelierdubricoleur.wordpress.com

-- Learn from yesterday, work today and enjoy success tomorrow. -- http://atelierdubricoleur.wordpress.com

View casual1carpenter's profile

casual1carpenter

353 posts in 1107 days


#8 posted 644 days ago

Serge Thank you, that is a very simple and easy solution to the tapered sliding dovetail. I guess that “I could not see the forest for the trees.” I read your answer and laugh at myself for having a brain fart and making a simple problem into one that appeared to be so complex. I believe I will be putting that table back into my thoughts. BTW, did you ever make a centering gauge for your dovetail slot jig?

Thanks again Serge.

View Bricofleur's profile

Bricofleur

1129 posts in 1824 days


#9 posted 644 days ago

@casual1carpenter: I center the jig using a 1/2” set-up block similar to these. This is the best gauge I encountered for this application.

Best,

Serge

-- Learn from yesterday, work today and enjoy success tomorrow. -- http://atelierdubricoleur.wordpress.com

View casual1carpenter's profile

casual1carpenter

353 posts in 1107 days


#10 posted 643 days ago

Serge, I was thinking something like this. Imagine the hole would need to be rather accurate but on the drill press I think it is doable. As long as the diagonal locating the center pin is greater than the 1 1/8” large diameter the pin would self center.

View Bricofleur's profile

Bricofleur

1129 posts in 1824 days


#11 posted 637 days ago

@casual1carpenter: It makes sense, but I don’t know if it’s worth it to make such jig to center the slot!

Best,

Serge

-- Learn from yesterday, work today and enjoy success tomorrow. -- http://atelierdubricoleur.wordpress.com

View woody57's profile

woody57

645 posts in 2059 days


#12 posted 635 days ago

Great idea. Thanks for postiing.

-- Emmett, from Georgia

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