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more dovetails labor savings

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more dovetails labor savings

#1

more dovetails labor savings

Bill Tindall, E.Tn.

Drawers are all the same and it gets tedious making them. Waste removal is particularly tedious and it is one of the largest time consuming steps. In my quest to take labor out of the process I have found another tool that makes waste removal go faster.



Picture 1 shows the half blinds after routing out the waste as best I can(more on this step later).



Typically 4 thrusting cuts with a chisel, using the saw kerf as a guide, removes waste from the side of the socket, except for a pesky bit in the back corner as shown.



The next chisel cut is a vertical plunge indexed along the back base line to free this splinter from the back baseline, Picture 3.

Here is where the problems begin. If the wood fibers are brittle the pesky splinter in the back corner will break off and leave the socket free or waste. More likely it will not. Some times the fibers are especially though and this pesky splinter will not break away. It must be cut.

The chisel in the hand at this point is too big to get a corner in there to cut this splinter free. A long time ago I acquired a "skew chisel" for this task. I tried and abandoned it (ineffective) for a small straight chisel which was not ideal either. Rethinking the problem I realized the skew was what was needed, it just had to be ground for the task.



Narex chisels have excellent steel and they are cheap. They have crappy handles though. To the rescue is Taylor Toolworks, Columbia, MO. They sell unhandled Narex chisels. I bought a 1/4" ($15), mounted it in the LV sharpening jig at a 14 degree angle and ground the skew as shown in the picture. This chisel is the correct size, and angle , for the job.

A right and left skew are not necessary. By tilting the chisel I can do right or left with one. Yea!

Re: more dovetails labor savings

#2

Re: more dovetails labor savings

Derek Cohen (in Perth, Australia)

Typically 4 thrusting cuts with a chisel, using the saw kerf as a guide, removes waste from the side of the socket, except for a pesky bit in the back corner as shown.

The next chisel cut is a vertical plunge indexed along the back base line to free this splinter from the back baseline, Picture 3.

Here is where the problems begin. If the wood fibers are brittle the pesky splinter in the back corner will break off and leave the socket free or waste. More likely it will not. Some times the fibers are especially though and this pesky splinter will not break away. It must be cut.

The chisel in the hand at this point is too big to get a corner in there to cut this splinter free. A long time ago I acquired a "skew chisel" for this task. I tried and abandoned it (ineffective) for a small straight chisel which was not ideal either. Rethinking the problem I realized the skew was what was needed, it just had to be ground for the task.

Bill, please try a fish tail chisel into the corner.

The issue I have with skew chisels is that you need to slice with them and this also requires several strokes ...


Plus you need two skew chisels, one for the right and one for the left corner.

On the other hand, a fishtail chisel is simply pushed into the corner ...


And you only need one. :)

Here is one I made out of a surplus preproduction Veritas 1/4" bench chisel (but several makers produce them) ...


Regards from Perth

Derek

Re: more dovetails labor savings

#3

Check my version of skew, not yours

Bill Tindall, E.Tn.

Had I known of a fish tail that is what I would have made, and may still if I order any other unhandled Narex.

However, I do not need a right and left handed skew. I just change the attack angle and one works fine for me. Other's results may differ.

And, a skew ground as in your diagram was what I originally tried and found near useless for the reasons you give. . But ground at 14 degrees, near my dovetail angle, I wind up with the same ability to thrust as the fish tail. And that is exactly how my chisel is used.

I bet I made my skew quicker than your fishtail, which could be important to some. Just mount in a sharpening jig at 14 degrees, +/- depending on ones preferred dovetail angle, and grind away. took 5 minutes and done.

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