LL

"Lawrence L'Hote"

11/04/2004 6:36 PM

Mortise-Tenon Fix Advice/Opinion Request

I'm trying to finish up that trash(ed) chair I mentioned here weeks ago.
http://home.mchsi.com/%7Elawlhote/chair/chair.htm

There is one problem(among many) that envolves a back support tenon and the
mortise in the back leg. From the pictures, it is clear the mortise is FAR
too large for the tenon.
http://home.mchsi.com/%7Elawlhote/chair/backmortise1.jpg
http://home.mchsi.com/%7Elawlhote/chair/backmortise2.jpg

The mortise is a little more than 3/8" thick and the corresponding tenon is
a little more than 1/4" thick(needless to say, it rattles). The length of
the mortise is the issue here. The little nail hole is because someone
needed to stabliize the joint a little with one of those Norm brads. As I
see it, there is really no easy way to make the tenon any larger. I'm
thinking about filling in large gap area in the mortise with tight fitting
pieces of oak and then packing slivers around the tenon then glueing the
joint with epoxy.
TIA
Larry


This topic has 6 replies

WB

"Wood Butcher"

in reply to "Lawrence L'Hote" on 11/04/2004 6:36 PM

11/04/2004 7:59 PM

How about squaring up the corners of the mortise and glueing in
a solid block of oak, then cutting a new mortise in that?

Art

"Lawrence L'Hote" <[email protected]> wrote in message
news:legec.15306$rg5.37909@attbi_s52...
> I'm trying to finish up that trash(ed) chair I mentioned here weeks ago.
> http://home.mchsi.com/%7Elawlhote/chair/chair.htm
>
> There is one problem(among many) that envolves a back support tenon and the
> mortise in the back leg. From the pictures, it is clear the mortise is FAR
> too large for the tenon.
> http://home.mchsi.com/%7Elawlhote/chair/backmortise1.jpg
> http://home.mchsi.com/%7Elawlhote/chair/backmortise2.jpg
>
> The mortise is a little more than 3/8" thick and the corresponding tenon is
> a little more than 1/4" thick(needless to say, it rattles). The length of
> the mortise is the issue here. The little nail hole is because someone
> needed to stabliize the joint a little with one of those Norm brads. As I
> see it, there is really no easy way to make the tenon any larger. I'm
> thinking about filling in large gap area in the mortise with tight fitting
> pieces of oak and then packing slivers around the tenon then glueing the
> joint with epoxy.
> TIA
> Larry
>
>

FM

"Frank McVey"

in reply to "Lawrence L'Hote" on 11/04/2004 6:36 PM

11/04/2004 8:45 PM

Art's fix should work well, since the tenon seems to be in pretty good
shape.

An alternative fix, assuming there's enough meat in the tenoned member,
would be to remove the tenon entirely and cut a corresponding mortice (or a
bridle joint), then use a loose tenon between the two mortices. This is
quite a common fix when the tenon has actually broken or is so chewed up
with nail and screw holes that it's become weak.

Cheers

Frank


"Lawrence L'Hote" <[email protected]> wrote in message
news:xNhec.13167$xn4.32583@attbi_s51...
>
> "Wood Butcher" <[email protected]> wrote in message
> news:1thec.112453$gA5.1454177@attbi_s03...
> > How about squaring up the corners of the mortise and glueing in
> > a solid block of oak, then cutting a new mortise in that?
> >
> Thanks Art
>
> I didn't think of that. I knew someone would have a better idea. That's
> what I'm going to do.
>
> Larry
>
>
>


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FM

"Frank McVey"

in reply to "Lawrence L'Hote" on 11/04/2004 6:36 PM

12/04/2004 5:11 PM

Yup, you're right, Wes - I only looked at the first picture, which shows an
apparently straight tenon. Under these circumstances, a better fix would be
to replace a damaged tenon with a full-width extension using a bridle joint
and recut the angled tenon as if from scratch..

Cheers,

Frank
"Wes Stewart" <n7ws@_arrl.net> wrote in message
news:[email protected]...
> On Sun, 11 Apr 2004 20:45:38 GMT, "Frank McVey"
> <[email protected]> wrote:
>
> |Art's fix should work well, since the tenon seems to be in pretty good
> |shape.
>
> I agree
> |
> |An alternative fix, assuming there's enough meat in the tenoned member,
> |would be to remove the tenon entirely and cut a corresponding mortice (or
a
> |bridle joint), then use a loose tenon between the two mortices. This is
> |quite a common fix when the tenon has actually broken or is so chewed up
> |with nail and screw holes that it's become weak.
>
> Might be tough since it's an angled tenon.
>
> Wes
>


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Outgoing mail is certified Virus Free.
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WS

Wes Stewart

in reply to "Lawrence L'Hote" on 11/04/2004 6:36 PM

11/04/2004 6:03 PM

On Sun, 11 Apr 2004 20:45:38 GMT, "Frank McVey"
<[email protected]> wrote:

|Art's fix should work well, since the tenon seems to be in pretty good
|shape.

I agree
|
|An alternative fix, assuming there's enough meat in the tenoned member,
|would be to remove the tenon entirely and cut a corresponding mortice (or a
|bridle joint), then use a loose tenon between the two mortices. This is
|quite a common fix when the tenon has actually broken or is so chewed up
|with nail and screw holes that it's become weak.

Might be tough since it's an angled tenon.

Wes

LL

"Lawrence L'Hote"

in reply to "Lawrence L'Hote" on 11/04/2004 6:36 PM

11/04/2004 8:21 PM


"Wood Butcher" <[email protected]> wrote in message
news:1thec.112453$gA5.1454177@attbi_s03...
> How about squaring up the corners of the mortise and glueing in
> a solid block of oak, then cutting a new mortise in that?
>
Thanks Art

I didn't think of that. I knew someone would have a better idea. That's
what I'm going to do.

Larry


WB

"Wood Butcher"

in reply to "Lawrence L'Hote" on 11/04/2004 6:36 PM

12/04/2004 6:09 PM

Jewberrywellgum.

Art

"Lawrence L'Hote" <[email protected]> wrote in message
news:xNhec.13167$xn4.32583@attbi_s51...
>
> "Wood Butcher" <[email protected]> wrote in message
> news:1thec.112453$gA5.1454177@attbi_s03...
> > How about squaring up the corners of the mortise and glueing in
> > a solid block of oak, then cutting a new mortise in that?
> >
> Thanks Art
>
> I didn't think of that. I knew someone would have a better idea. That's
> what I'm going to do.
>
> Larry
>
>
>


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