Hi all.
For my exterior door frame project....
I will be butting together two lengths of sapele/mahog.
The individual pieces are about 22mm x 140mm and 1040cm long...and joining
them on the long edges to make 260mm wide panels.
Should I buy a jointing router bit or can I get away with using biscuits.
Once they are joined i will be fielding them.

Thanks.

Arthur

Arthur2 wrote:
Hi all.
For my exterior door frame project....
I will be butting together two lengths of sapele/mahog.
The individual pieces are about 22mm x 140mm and 1040cm long...and
joining them on the long edges to make 260mm wide panels.
Should I buy a jointing router bit or can I get away with using
biscuits. Once they are joined i will be fielding them.

Thats a job they invented biscuits for, prevents up/down movement, but
allows lateral movement. Very strong as well.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

On 2008-08-06 17:37:58 +0100, "Arthur2" said:

Hi all.
For my exterior door frame project....
I will be butting together two lengths of sapele/mahog.
The individual pieces are about 22mm x 140mm and 1040cm long...and joining
them on the long edges to make 260mm wide panels.
Should I buy a jointing router bit or can I get away with using biscuits.
Once they are joined i will be fielding them.

Thanks.

Arthur

I've done this both ways and had satisfactory results. That's using a
biscuit jointer with biscuits about every 150-200mm; a router bit with
a wavy glue profile and a spindle moulder block with similar profile
cutters.

There is an argument in favour of the glue joint approach in that there
is more surface area for gluing on the edge. OTOH, the biscuits make
up for some of that.

Really important is to have a flat surface for gluing up and plenty of
good clamps to make sure that the pieces remain in the same plane.
If you don't have any already, Bessey K clamps are really good for this
because they are solid and heavy and you can arrange everything to lay
flat. There are Chinese equivalents which aren't too bad. Some
pieces of softwood between the clamp jaws and the material are a good
idea because clamping tightly is important.

Using a pair of sticks as winding sticks to check for warping etc
before the glue goes off is a Good Idea.

"Andy Hall" wrote in message news:4899fd12@qaanaaq...
On 2008-08-06 17:37:58 +0100, "Arthur2" said:

Hi all.
For my exterior door frame project....
I will be butting together two lengths of sapele/mahog.
The individual pieces are about 22mm x 140mm and 1040cm long...and
joining
them on the long edges to make 260mm wide panels.
Should I buy a jointing router bit or can I get away with using biscuits.
Once they are joined i will be fielding them.

Thanks.

Arthur

I've done this both ways and had satisfactory results. That's using a
biscuit jointer with biscuits about every 150-200mm; a router bit with a
wavy glue profile and a spindle moulder block with similar profile
cutters.

There is an argument in favour of the glue joint approach in that there is
more surface area for gluing on the edge. OTOH, the biscuits make up for
some of that.

Really important is to have a flat surface for gluing up and plenty of
good clamps to make sure that the pieces remain in the same plane. If
you don't have any already, Bessey K clamps are really good for this
because they are solid and heavy and you can arrange everything to lay
flat. There are Chinese equivalents which aren't too bad. Some pieces
of softwood between the clamp jaws and the material are a good idea
because clamping tightly is important.

Using a pair of sticks as winding sticks to check for warping etc before
the glue goes off is a Good Idea.


I will give the glueing set up a dry run and I'll make use of all the clamps
I have.
I have a lot of quick grip clamps and three 9" steel g clamps.

Will waterproof pva be good enough?

Arthur

On 2008-08-06 22:11:43 +0100, "Arthur2" said:

I will give the glueing set up a dry run and I'll make use of all the clamps
I have.
I have a lot of quick grip clamps and three 9" steel g clamps.

Will waterproof pva be good enough?


For these types of woods, I have tended to wipe the surfaces to be
glued with acetone and then apply a very thin layer of polyurethane
glue to one face and a wipe with a damp cloth to the other. PU glue
cures with moisture.

Then clamp at least overnight. That seems to work reliably.

I tried without the acetone cleaning once and the joint broke apart
easily at the glue line. AIUI, the issue is that the oils in certain
tropical hardwoods reduce the ability of the glue to penetrate the
pores of the wood.

On Wed, 06 Aug 2008 18:53:10 GMT, "The Medway Handyman"
wrote:

The individual pieces are about 22mm x 140mm and 1040cm long...and
joining them on the long edges to make 260mm wide panels.

Thats a job they invented biscuits for, prevents up/down movement, but
allows lateral movement. Very strong as well.

Why should there be any lateral movement? It's a parallel long-grain
joint.

On 2008-08-07 08:46:50 +0100, "The Medway Handyman"
said:


From: "Andy Dingley"
Subject: Jointing or Biscuits
Date: 07 August 2008 00:45

On Wed, 06 Aug 2008 18:53:10 GMT, "The Medway Handyman"
wrote:

The individual pieces are about 22mm x 140mm and 1040cm long...and
joining them on the long edges to make 260mm wide panels.

Thats a job they invented biscuits for, prevents up/down movement, but
allows lateral movement. Very strong as well.

Why should there be any lateral movement? It's a parallel long-grain
joint.

By lateral movement I meant that if you are joining two boards along their
long edges, you have movement along those long edges IYSWIM. So you could
get the ends to line up for example.

Isn't that lateral?

Longitudinal.

Jointing or Biscuits

it's called the munchies
when after jointing you crave biscuits
--

[george]

"Arthur2" wrote in message
...
Hi all.
For my exterior door frame project....
I will be butting together two lengths of sapele/mahog.
The individual pieces are about 22mm x 140mm and 1040cm long...and joining
them on the long edges to make 260mm wide panels.
Should I buy a jointing router bit or can I get away with using biscuits.
Once they are joined i will be fielding them.

Thanks.

Arthur



Thanks for all advice, gents.

Arthur