Dowel pinning M&T joints - Woodworking Talk - Woodworkers Forum
 
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post #1 of 8 Old 04-24-2012, 10:40 AM Thread Starter
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Dowel pinning M&T joints

Hi All,

Is there a name for the type of pinning of a mortise and tenon joint where the dowel is inserted long ways through the cheek of the tenon? See image attached.

All the pinning or pegging I see is through the face but I do not what it to show.

Thanks
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post #2 of 8 Old 04-24-2012, 11:09 AM
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Why do you want to pin it, if you don't want the pins to show?

Pure mathematics is, in it's way, the poetry of logical ideas. - Albert Einstein.
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post #3 of 8 Old 04-24-2012, 11:27 AM
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those are some long pins.

build it right or not at all
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post #4 of 8 Old 04-24-2012, 11:33 AM Thread Starter
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The pins in the image would not be visible because they will be inserted from the top and bottom of the door. I am just want to make sure that the M&T do not separate.
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post #5 of 8 Old 04-24-2012, 11:38 AM
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If you use wood glue, the tensile strength is towards 4,000 psi, stronger than the wood. That M&T in the drawing will never separate.

Pure mathematics is, in it's way, the poetry of logical ideas. - Albert Einstein.
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post #6 of 8 Old 04-24-2012, 12:45 PM
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Wood Glue

Yep a good exterior grade glue will do the job.

Tools are like guns, You can never have enough.
Where did I put that tape measure???
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post #7 of 8 Old 04-24-2012, 02:05 PM
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Quote:
Originally Posted by WillemJM View Post
If you use wood glue, the tensile strength is towards 4,000 psi, stronger than the wood. That M&T in the drawing will never separate.
+1 on the M and T strength. the pin wont make it any stronger.

build it right or not at all
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post #8 of 8 Old 04-24-2012, 04:27 PM
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Belt and suspenders!
A lot if not most M&T joints are cross grain. The reason for the haunch etc. is to get as good a mechanical joint as possible. If the tenon if very wide and the joint will be subject to racking like table legs, then the added mechanical lock against the shoulders of the joint with a pin is valuable and wise. Often the pin can be on a hidden area if you don't want the decorative contrast. Small dowels or square pegs add a lot of strength.
If the joint will not be stressed, it probably is OK with glue.
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