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
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