Re: ATM 3/4" plywood for dob.?

["Jan van Gastel" <jhm.vangastel@wanadoo.nl>]

I clamped the sides with glue clamps. Very tight, but not so tight that all
glue is pressed from between the joints.
The information on the glue can says to use a pressure of 5kg/cm^2  (= 71
PSI). For two sides of my mirrorbox this would be a total pressure of 441
kilo or 972 lbs. I don't think the pressure I actually uses is that high.
Maybe exactly under the clamps, but not over the whole joint.

Jan
http://www.geocities.com/janvangastel/


----- Original Message -----
From: <lifedata@vol.com>
To: "Jan van Gastel" <jhm.vangastel@wanadoo.nl>
Sent: Wednesday, April 18, 2001 8:30 PM
Subject: Re: ATM 3/4" plywood for dob.?


> "Jan van Gastel" <jhm.vangastel@wanadoo.nl> said:
>
> >I haven't used one screw on my mirrorbox and rockerbox: only glue. I
> >never use screws when I use glue and never had problems.
>
> I'm curious about a couple things.  I think it is probably obvious that
> you have well fitted, smooth joining surfaces.
>
> My greater interest is in what kind of clamping pressure you use.  I see
> good Norm Abrams making some joints with no more pressure than that
> generated by popping a couple brads into it.  I was taught to put about
> as much ressure as you could without damaging the wood.  On the other
> hand, someone on a woodworking news group swears that if you clamp a
> joint tight it will starve the joint of glue.  Apparently glue
> evaporates under pressure. <G>
>
> Jim L
> MR/2 ICE, version 2.27.     You can know. 1 John 5:13
>
>
>