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| Here is what some users are posting on various Message Board Forums. | |||||
Click on link above to view original message. |
"Today the Dallas Club held a very
interesting workshop dealing with sheet metal repair. A different method was
used to shrink the stretched metal that resulted from a rear end collision.
Ron Davis, a long time member of the group and excellent restorer, was
returning home from a tour when a lady on a cell phone rammed his car from
behind. The trunk caved into the bustle of the fordor and did considerable
damage. The photos don’t show the true extent of the damage but the right
side was pushed in 4 to 5 inches in several places with slightly less damage
to the left side. The metal was pulled from the seams and stretched a lot in
numerous places. I’ll try to explain what is being done to repair the car. I
hope you enjoy the photos." Dick Sparks / Texas Check out the original message to view the series of project pictures Ron Davis and his father in action with The Friction System.
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"I have one along with the grinder that
he sells for it. It works as advertised. It does NOT remove metal as some
people think. I metal finished a Toyota quarter panel with it where the
metal was so damaged it was folded over its self. I did it with NO filler
what so ever, metal polished for a nice med coat of primer. As it is called
"AMAZING"."
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ford-trucks.com Closed site |
Posted by: cid "This is a slick system. It can be used on any grinder (almost). It involves a disk, usually metal, attached to your grinder. You need a grinder that will allow you to control the RPM's. The tool is used in heat shrinking/expansion. The purpose of the spinning metal disk is to generate heat. Heat causes the metal to expand. Its used on large flat panels such as hoods or roofs. I saw it used on a roof chop operation. There were a few low spots in the roof after welding. The low spots were 3'x3'. The disc is used like a polisher. By moving the disc around on the sheet metal you can expanding the metal and bingo no low spot, or at least no filler only blocking primer surfacer. You need to really bond with this machine because it can do a lot of damage. You have to know when to back off and when to stay on."
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www.hotrodders.com
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Shrinking
discs have been around for years, it takes a little practice and skill to
use one and most guys are afraid of them, with practice and careful use they
are GREAT, I learned on my 36 Hudson front fenders, they were a complete
disaster and I figured I couldn't hurt them, they came out beautiful.
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Ok, I have one. It does EVERYTHING he says it does! Thick metal? Has NOTHING to do with it. In fact, the thinner the metal the better it works. You are not heating a large area like a torch. Think of if as a "heat block". You are ONLY heating the high spots. You then cool it and shrink ONLY the high spots. You are taking NO metal off. Now, you then go over it with an 80 grit open coat grinding disc. Again, these are large 9" discs on a VERY firm backing. You are "blocking" with the grinder and cutting only a very little bit of metal off. I don't use it everyday, in fact take it out very little. I just grind them and spread filler, sorry. But when I had the time to play with it, it was AMAZING. I metal finished a quarter panel on a Toyota, yes a Toyota that was so bad the metal was folded over it's self! I metal finished it using the disc to a darn near polished state. It took LESS primer than I usually use filling the average plastic filler repair. IT WORKS EXACTLY AS HE SAYS IT DOES. Learning curve? That is so hard to say, everyone is so different. I would say that if you have a basic knowledge of metal finishing and hammer and dolly work, you do it your first try. Safety? Man, that is a good one. You HAVE TO use a large 15 amp 5000 RPM grinder (he sells it at a good price) it is one MEAN mutha. But like any tool, treat it with respect and it will do it's job...... He also has MANY, MANY other tools of very high quality like hammers, dollies and the like. I bought a die for my pneumatic Planishing hammer from him. I have never seen another for sale, so he has the hard to find stuff too.
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