---------------------- multipart/alternative attachment .> > Sent from the Internet > > > > > ----- Original Message ----- > From: "Farrell" <mfarrel2@tampabay.rr.com> > To: <pianotech@ptg.org> > Sent: February 17, 2002 6:34 AM > Subject: Pneumatic Press Bending > . Diito that Del 40to 45 lbs. pressure. Above 60 is scary. >>>Dale > > > I tested a bunch of different pressures with rib-to-soundboard joints a few > years back. Below about 30 lbs the failure was predominately glue failure > from thick glue joints. Above 70 lbs or so (I don't remember the exact > figures) the failure was primarily due to starved glue joints. The > strongest > adhesive bonds resulted from pressures between about 40 lbs and 60 lbs > where > the predominate failure was with the wood. We use between 40 and 45 lbs in > our press. > > Del > ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/8b/41/58/93/attachment.htm ---------------------- multipart/alternative attachment--
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