Mortise and tenon ??? - Router Forums
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post #1 of 33 (permalink) Old 03-26-2012, 05:45 PM Thread Starter
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Default Mortise and tenon ???

Finished the dinning room table and naturally the chairs seem next.
Do you mortise with the router ? I see a lot of different jigs including the General tools jig . Any one try this yet ? I want to make matching chairs inlay turquoise etc....
I do also have a mortiser I have used with some sucess.

Some people try to turn back their odometers. Not me, I want people to know "why" I look this way. I've traveled a long way and some of the roads weren't paved.
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post #2 of 33 (permalink) Old 03-26-2012, 07:35 PM
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Bob, building chairs requires a fair amount of planning. I am no chair expert but most of what I know about them involves tenoning, drilling, and reaming. Square doesn't seem to enter into it. Have a look at the following links.

Lee Valley Tools - Important Announcement
Lee Valley Tools - Important Announcement
http://www.leevalley.com/en/wood/pag...80,42240,53317

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.

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post #3 of 33 (permalink) Old 03-26-2012, 09:39 PM
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Chair making requires good tight fitting joints or the chair will have a very short life.
Most woodworkers shy away from chair making for this reason. You will need to make angled as well as straight mortises and tenons for chair making, so whatever jig you choose to buy or make will need to be capable of doing this. Many jigs have only been designed for making straight mortises and tenons. Some can be adapted to do angled joints, but usually require wedges to position the work at an angle to make the joint. I've found that this is method is very time consuming and error prone.

I own a Leigh FMT Pro jig which can easily be set up to make angled or straight mortises and tenons with a router, and the resulting joints fit perfectly. There may be other jigs on the market that can do this, but I have no experience with them.

Central North Carolina
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post #4 of 33 (permalink) Old 03-27-2012, 02:41 PM
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Do you mortise with the router ? I see a lot of different jigs including the General tools jig . Any one try this yet ? I want to make matching chairs inlay turquoise etc....
I do also have a mortiser I have used with some sucess.[/QUOTE]

Bob,
Like every project, there are as many ways to do a project as there are people interested in completing it. On the chairs that I made, I used a router to do the mortising. (Up cut spiral bit). Since that time, I also pitched the jigs used as the project was complete, but I'll try and assist if possible. I started trying to cut tenons to fit my mortises but without great success because of all of the angles. I finally settled on a floating tenon system which worked out quite will and was considerably easier and provided a much tighter fit.
Now as to the jig-----
I cut a rectangular block of wood (3/4") fairly wide at the desired angle of the mortise. (Most of mine were between 3 and 7 deg.) Make your board long enough to handle safely. Then, using my router table, I cut a slot in the jig which was wide enough to accept a guide bushing and the length that I wanted for the tenon. After that, I tacked a board onto the jig 90 deg. to the flat to give something to temporally clamp leg being mortised. I used a 5/16" tendon and rounded the edge to match the mortise. All of the joints were quite snug, but remember that you can also resize the tenon if needed for fit.
Attached are a few pictures to help visualize the process that I used.
Good Luck.. The chairs will definitely give you a challenge.
Dick
Mortise and tenon ???-chair-1.jpg

Mortise and tenon ???-chair-2.jpg

Mortise and tenon ???-chair3.jpg

Mortise and tenon ???-img_1038.jpg

Mortise and tenon ???-completed-chair1.jpg
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post #5 of 33 (permalink) Old 03-27-2012, 07:15 PM
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I am in the middle of making chairs right now. I started in early January. I can offer a couple of points. Firstly the build complexity will vary greatly depending on the chair design. Some chairs have lots of angles as has been pointed out. Some have fairly straight lines and will be much easier to build.
The best way to start is to search the web for chair designs and find one or two that you like and think you can make successfully. Once you have a chair design you can focus on wood and how to make them.
Bear in mind you will be making six or more probably. The project moves from fun to tedium when a lot of boring, repetitive steps need to be done.
You will need a reliable way of making mortises that are dead accurate from one chair leg to the other. Jigs are necessary as well as a mortising machine of some kind. I made a slot mortiser that worked out very well and allowed me to duplicate mortises easily.
Floating tenons are much easier for sure as Dick has pointed out.
Hope this helps. Some of it duplicates earlier posts but it's worth repeating. I'd be happy to offer any additional support as well.
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post #6 of 33 (permalink) Old 03-28-2012, 07:40 AM
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I hope this thread continues. I am hoping to build a dining table and chairs soon. Building yhe chairs were my biggest worry. Wish you a lot of success
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post #7 of 33 (permalink) Old 03-28-2012, 07:44 AM Thread Starter
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Thanks all!
I have decided pretty much the style of the chairs
similar to these Chairs and Barstools,Stirctly Southwestern inc.,Southwest Lighting,wall lights,fabric,ceiling lights,Southwest Lights,Lamps,ceiling fans,Ceiling Fans,lamps They will match the Dinning room table I built There are pictures on the "show and tell ". It looks like most of the joints are square but I want something to use that is accurate and repeatable .The General Tools jig looks interesting and Mama allows one new tool for each project . As I see from your replies a lot of thought is needed to find the best way. Can you describe the floating tenon ?

Some people try to turn back their odometers. Not me, I want people to know "why" I look this way. I've traveled a long way and some of the roads weren't paved.
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post #8 of 33 (permalink) Old 03-28-2012, 07:47 AM Thread Starter
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Beautiful chair Dick !

Some people try to turn back their odometers. Not me, I want people to know "why" I look this way. I've traveled a long way and some of the roads weren't paved.
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post #9 of 33 (permalink) Old 03-28-2012, 08:23 AM
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Bob14,

To use "floating tenons" you make a matching mortise in both parts, then make a long tenon to fit into them, add glue and clamp together. You really don't need the tenon to be made on one piece. It can be made from separate stock, inserted and glued into mortises in both parts. This is "floating tenon" joinery. A dowel joint is a form of floating tenon joinery.

Central North Carolina
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post #10 of 33 (permalink) Old 03-28-2012, 09:59 AM
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