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Author Topic: How about wooden L-tenon connectors from Festool for DF500 or 700  (Read 2456 times)

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Offline ChuckM

  • Posts: 1759
How about wooden L-tenon connectors from Festool for DF500 or 700
« on: March 18, 2018, 08:53 PM »
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Offline Svar

  • Posts: 2087
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #1 on: March 18, 2018, 09:11 PM »
Interesting, but too tedious. Now in addition to everything else you need to finger joint pieces of tenons, which by the way will be the weakest point. How about simple hidden spline.
« Last Edit: March 20, 2018, 03:23 PM by Svar »
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Offline tallgrass

  • Posts: 919
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #2 on: March 19, 2018, 03:20 AM »
It is an interesting idea. Not sure about this particular execution of the "L" bracket.
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Offline Tinker

  • Posts: 3740
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #3 on: March 19, 2018, 04:14 AM »
It looks like a lot of extra motion to add nothing to the strength of the joint.
Tinker
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Wayne H. Tinker

Offline Michael Kellough

  • Posts: 4768
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #4 on: March 19, 2018, 08:46 AM »
It does add a little strength to the joint. Not enough to be worthwhile for ordinary cabinetmaking but he has a good reason to do this. (To be clear, this joint is less strong than using Dominos the usual way, at 45 degrees to both parts)

He carves the parts, sometimes carving around the corner.

Using the finger jointed tenons at ninety degrees to one another allows the tenons to stay in the middle of the boards keeping them well below the finished surface of the part compared to the usual tenon reinforced miter joint which uses a tenon at 45
degrees to the part surface so the end of the tenons are just below the surface. He probably exposed one while carving...



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Offline ChuckM

  • Posts: 1759
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #5 on: March 19, 2018, 11:11 AM »
Quote from: Michael Kellough on March 19, 2018, 08:46 AM


He carves the parts, sometimes carving around the corner.



Good point.

He did mention a couple of names in the video, but I haven't tried to look into the backgrounds of them and wonder if they are carvers, too, or do work with a focus on carving.

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Offline Tinker

  • Posts: 3740
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #6 on: March 20, 2018, 05:17 AM »
Quote from: Michael Kellough on March 19, 2018, 08:46 AM
It does add a little strength to the joint. Not enough to be worthwhile for ordinary cabinetmaking but he has a good reason to do this. (To be clear, this joint is less strong than using Dominos the usual way, at 45 degrees to both parts)

He carves the parts, sometimes carving around the corner.

Using the finger jointed tenons at ninety degrees to one another allows the tenons to stay in the middle of the boards keeping them well below the finished surface of the part compared to the usual tenon reinforced miter joint which uses a tenon at 45
degrees to the part surface so the end of the tenons are just below the surface. He probably exposed one while carving...

ah ha, I see it all clearly now!
Tinker
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Wayne H. Tinker

Offline HarveyWildes

  • Posts: 924
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #7 on: March 20, 2018, 07:20 AM »
A little on the limits of using dominos on miters without finger jointing.  I would not want to test the limits too closely.

 
« Last Edit: March 20, 2018, 07:24 AM by HarveyWildes »
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Offline RDMuller

  • Posts: 314
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #8 on: March 20, 2018, 09:10 AM »
I do see some advantages to drilling the mortises straight in from the ends on thick hardwoods such as 6/4 walnut.  You would be going with the grain.  When drilling at 45 degrees you are sort of going cross grain and the machine can "scoot" crooked on you.  No problem with softer woods and composite material.
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Offline Tinker

  • Posts: 3740
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #9 on: March 20, 2018, 02:24 PM »
As I understand @Michael Kellough explanation, it is possible that super strength is not so important. I make a lot of serving trays. For those, I would not use the joint as the OP shows. For wood carving joint as Michael explains, if I were doing that joint, I would definitely want my carving tools to be REAL sharp.
Tinker
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Wayne H. Tinker

Offline ChuckM

  • Posts: 1759
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #10 on: March 20, 2018, 02:38 PM »
Anyone interested in learning more about this L-tenon application can check out the FW #254–May/June 2016 Issue (p. 54- 59), including a wooden/aluminum L-tenon variation and a plywood version. After seeing the sample builds employing these tenons in the article (including large scale cabinets, chair, etc.), I am convinced that this kind of L-tenon has its role in more than just carved boxes.

The article offers other advantages of this kind of tenon. It certainly gives me food for thought next time when I approach another mitered project with dominoes as the joinery.
« Last Edit: March 20, 2018, 02:41 PM by ChuckM »
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Offline Svar

  • Posts: 2087
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #11 on: March 20, 2018, 03:04 PM »
I simply use hidden splines (see attached picture). They are quick and easy to cut. I put one every 4-5 cm. Compare the glue area of finger joint of L-tenons on the left (light brown area is what matters). 1 spline is roughly equivalent to 1 L-bracket with 4 "fingers". Not worth the effort IMHO.

Now, if L-tenons were aluminum, that's a different story.
You could chop them up from thick aluminum angle and have a knockdown joint!
« Last Edit: March 20, 2018, 04:55 PM by Svar »
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Offline Michael Kellough

  • Posts: 4768
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #12 on: March 20, 2018, 07:06 PM »
@Svar   How do you cut the mortises? Domino before the miters are cut?
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Offline Svar

  • Posts: 2087
Re: How about wooden L-tenon connectors from Festool for DF500 or 700
« Reply #13 on: March 20, 2018, 07:21 PM »
Quote from: Michael Kellough on March 20, 2018, 07:06 PM
@Svar   How do you cut the mortises? Domino before the miters are cut?
I used to do it on a router table after cutting miters. Do all parts referencing from the same side, move the fence, repeat.
Later I made a jig - strip of ply with notches in it at equal intervals. Similar to what's used for dovetails. Clamp it to the edge of the miter, rout with straight bit and guide bushing. One side of the slot turns out rounded. You can either square it with chisel or round the splines.
If you have dovetail jig that would be the best to cut these slots.
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