Dining chairs - screws through mortise and tenon? - Page 2 - Woodworking Talk - Woodworkers Forum
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post #21 of 23 Old 04-25-2014, 08:02 PM
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Originally Posted by bzguy
The screws are actually the only thing holding the defective mortise and tenon joints together. They were predrilled with the proper diameter bit to make it work, NO SPLINTERING. As explained they shrink too much for glue to hold. I don't make them, just found a way to get poorly made chairs to stay in one piece. They are the only ones on my island out of hundreds that have 0% failure.
You can't without removing the screws know if the joint is defective or not.

Good craftsmanship no....strong...maybe.

The tools don't make the craftsman....
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post #22 of 23 Old 04-26-2014, 09:06 AM
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Originally Posted by ryan50hrl View Post
You can't without removing the screws know if the joint is defective or not.

Good craftsmanship no....strong...maybe.
Once again I will tell you that the joints are 100% defective, I didn't make them, just used a cost effective way to strengthen the Mennonites shoddy joints.
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post #23 of 23 Old 04-26-2014, 10:13 AM
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>>>> The screws add nothing and actually weaken the joint by splintering the tenon.

I would think the screws perform the same function as wedges in that they spread the tenon causing a tighter mating joint.

Again, I could be wrong but it looks to me that there is no adhesive used in the joint. I have been in a couple of Amish workshops and don't recall seeing any air powered nail guns.

I am still of the opinion that the screws driven into the M&T joint are an effective reinforcement just as nails driven into the same location would be.

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