--- gordon stelter <lclgcnp@yahoo.com> wrote: > And wear a carbon filter mask and goggles! I'm sure > breathing this much CA fume is not good for you! > --- Billbrpt@AOL.COM wrote: > > In a message dated 7/30/02 11:30:39 PM Central > > Daylight Time, > > mfarrel2@tampabay.rr.com (Farrell) writes: > > > > > > > One clear thing I have noticed about CA glue is > > that it has little shear > > > strength. Take two flat pieces of wood. Glue the > > flat faces together with > > > CA (I would use thick or medium). After cure, > just > > tap the end of one of > > > the boards while holding the other (so that you > > are applying a shear > > > stress) - they will break apart very easily. I > > often use this to my > > > advantage when making temporary jigs (like for > > locating bridges, etc.). > > > > > I haven't been able to follow much of this or any > > recent threads but this > > caught my eye. The fact that the shear strength > is > > weak is why CA glue > > pinblock doping actually works. If the glue could > > really hold the pin, it > > would be stuck so hard and fast that it could only > > break when trying to turn > > it. Yet, the bond gives way on first impact but > the > > material has still > > filled a gap and is nevertheless somewhat sticky. > > This sometimes makes for a > > good repair for loose tuning pins. > > > > This also is the reason why CA glue is good for > > repairing stripped screw > > holes. I usually put some glue in the stripped > > hole, dip the screw in the > > catalyst, then insert the screw. It goes in > easily > > but within seconds, the > > glue is cured and initially, the screw is stuck. > > But one turn with a > > screwdriver and the initial bond is broken, > leaving > > a filled gap and a sticky > > surface. The repaired screw hole often feels like > > it had been plugged with > > hard rock maple and redrilled. If a first attempt > > at this is less than > > satisfactory, then a repeat attempt will often > work. > > > > One person asked me privately about restringing > > using CA glue as pin driving > > fluid. The same idea works here. If you are > > restringing a piano with pins > > that had a good feel, using CA glue as pin driving > > fluid will allow you to > > use the same sized pin again, avoiding the trauma > to > > the pinblock of using > > over sized pins. > > > > One caution about doing the latter, cover your > > support jack with something > > disposable because some CA glue could run down and > > glue the support jack to > > the underside of the pinblock. But again, even in > > the event this happens, a > > good, sideways whack with a sledge hammer will > break > > the bond instantly. > > > > Bill Bremmer RPT > > Madison, Wisconsin > > <A HREF="http://www.billbremmer.com/">Click here: > > -=w w w . b i l l b r e m m e r . c o m =-</A> > > > > > __________________________________________________ > Do You Yahoo!? > Yahoo! Health - Feel better, live better > http://health.yahoo.com __________________________________________________ Do You Yahoo!? Yahoo! Health - Feel better, live better http://health.yahoo.com
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