The Society of American Period Furniture Makers

Tools and Techniques => Period design and construction => Topic started by: Jeff L Headley on August 23, 2012, 08:37:20 PM

Title: Mortise and tenon
Post by: Jeff L Headley on August 23, 2012, 08:37:20 PM
How and why?
Title: Re: Mortise and tenon
Post by: Jeff L Headley on August 23, 2012, 08:55:09 PM
How and why would you use a mortised and tenoned joint? All periods should be considered. Always bevel the ends of each tenon.
Title: Re: Mortise and tenon
Post by: Jeff L Headley on August 23, 2012, 09:35:44 PM
Always use a cutting gauge, not a marking gauge and cut right to the line.
Title: Re: Mortise and tenon
Post by: Jeff L Headley on August 24, 2012, 04:55:11 PM
Many, if not most, period mortises are 5/16" with about 3/8" of meat on the outside edge. 
Title: Re: Mortise and tenon
Post by: Jeff L Headley on August 24, 2012, 08:37:25 PM
If you don't  bevel the ends of your tenons then it would be like sticking this dog in a two inch hole. I would never do that. You shouldn't either.
Title: Re: Mortise and tenon
Post by: Jeff L Headley on August 26, 2012, 05:48:56 PM
My 5/16" tenon thickness comment with there being 3/8"of meat from the outside edge is only meant as a general rule in period furniture.
Title: Re: Mortise and tenon
Post by: Jeff L Headley on August 30, 2012, 10:28:17 PM
Poor Mortise and Tenon joint every bit as important as the dovetail but always overlooked!
Title: Re: Mortise and tenon
Post by: pampine on August 31, 2012, 01:02:40 AM
I've always considered dovetails special case M&T's.

Pam
Title: Re: Mortise and tenon
Post by: MichaelP on October 12, 2012, 12:36:35 PM
Have you found many split tenons on wider rails in your observations of period furniture? If so, what determines when such a tenon is split?

Michael
Title: Re: Mortise and tenon
Post by: Jeff L Headley on December 06, 2014, 06:02:24 PM
Split tennons are used more for internal construction. Wedging a tenon is an act of dovetailing by definition. 
Title: Re: Mortise and tenon
Post by: CBWW on December 06, 2014, 07:53:11 PM
I have seen plenty of period tenons that do not have bevel ends.  ANy thru tenon might as well be wedged.  Why not?  It just makes it that much stronger.  I have mainly seen them on the top of pedestal tables where the columnb joins the block.  And thru side rail tenons....Make sure the tenon fits very snug into the mortise on the width prior to wedgeing to avoid splits below the tenon...
Title: Re: Mortise and tenon
Post by: Jeff L Headley on December 06, 2014, 09:59:56 PM
Were the through tennons ends beveled first and then the bevel trimmed flat afterwards?
Title: Re: Mortise and tenon
Post by: Jack Plane on December 06, 2014, 11:03:41 PM
Were the through tennons ends beveled first and then the bevel trimmed flat afterwards?

Quite probably. Those I have seen were trimmed level with the block, so why not bevel the tenons first if it eases them through initially?

I have seen very few North American side- and dining chairs, but those I have seen had seat rails which were through-tenoned and wedged (at the back only).

Also, many bookcase/linencupboard doors frames were through-tenoned and wedged.