KR> CCW wood screws
Posted: Wed Feb 09, 2005 10:28 am
Original Posted By: "DJ Vegh"
Some time ago someone gave me a box of stuff that had belonged tosomeone that was no longer around. I understand that the old timerspent his time restoring old British airplanes - mainly wood (Tiger Mothand Chipmunk?). I was the only airplane guy they knew, so rather thantoss it out, it came my way.There were some useful things in there, including a super tubing cutterfor the smaller sizes (under 1/2") and turning tools for ferrels,flaring tools etc.Recently I needed some wood screws that were going to be covered withply forever. I did not know if the moisture in the spruce (6%?) wouldultimately corrode steel screws, so I decided to use brass just in case,but where to on a Sunday eve.I remembered seeing some brass wood screws in one of the little drawersin this box of treasures - they were the perfect size.Problem is, they would not do what screws are supposed to do. After aperiod of total perplexion, I finally realized that they had a left-hand"thread". I turned them backwards and in they went. I was reluctant tobury them under the ply, they may be unique and valuable.I cannot dredge up any logical reason why anyone would make a reversethread wood screw - maybe to counter harmonic vibrations??I doubt anyone else has any answers, but worth mentioning.Take careSteve J======================Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________
Some time ago someone gave me a box of stuff that had belonged tosomeone that was no longer around. I understand that the old timerspent his time restoring old British airplanes - mainly wood (Tiger Mothand Chipmunk?). I was the only airplane guy they knew, so rather thantoss it out, it came my way.There were some useful things in there, including a super tubing cutterfor the smaller sizes (under 1/2") and turning tools for ferrels,flaring tools etc.Recently I needed some wood screws that were going to be covered withply forever. I did not know if the moisture in the spruce (6%?) wouldultimately corrode steel screws, so I decided to use brass just in case,but where to on a Sunday eve.I remembered seeing some brass wood screws in one of the little drawersin this box of treasures - they were the perfect size.Problem is, they would not do what screws are supposed to do. After aperiod of total perplexion, I finally realized that they had a left-hand"thread". I turned them backwards and in they went. I was reluctant tobury them under the ply, they may be unique and valuable.I cannot dredge up any logical reason why anyone would make a reversethread wood screw - maybe to counter harmonic vibrations??I doubt anyone else has any answers, but worth mentioning.Take careSteve J======================Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________