Nevertheless I build it as a tool to begin with (and as an entry in the "Build a Tool" contest). It was not my intention to fabricate a concealed weapon and I am not planning to use it as such, but if you would do so it would be entirely on your own responsability. Ten pre-set scribing depths from 1/8 to 1 (3 to 25 mm). Perhaps it could even break glass in an emergency, I'm not keen on trying that out. Scribe commonplace trim lines on galvanized sheet metal quickly and accurately. I think of an EDC (every day carry) where one could apply the pen as a sort of Kubotan in a self defence situation. The pointy steel edge could be used in other circumstances as well. One could not use mild steel for that since it does not contain enough carbon to be hardened - but that is another subject. With the same dimensions it should work fine but keep in mind that the point should be hard enough to actually be able to scribe in the metal. Perhaps one could use a metal rod in stead of a precision screwdriver. I did try out another generic brand which had the same kind of filling but the scriber didn't retract because the pen already had a faulty mechanism to begin with (testing before is handy sometimes). I used a pen of the Parker brand, simply because that was at hand and both the filling and the screwdriver had more or less the same dimensions. I can carry it with me without worrying of loosing it or more importantly: injuring myself or damaging my clothes. I therefore call it my "Portable Scriber" -) If the tip is worn out, another empty pen can be used. Since tungsten carbide is only next to diamond in hardness it can scribe most metals for a long time before wearing out. You could also use a file to get the same result, it only takes longer and requires more "elbow grease".Īfter testing, the scriber works just like a "normal" scriber but this one can also be handled as an everyday ballpoint pen. I use empty ballpoint pens with tungsten carbide tip as a scriber, without any modifications, on sheet metal (tested on copper, aluminium and even HSS hack saw blade). I found both steps easy to do since I put the screwdriver in a cordless drill and sanded it with a bench grinder. Because it was a screwdriver to begin with, the metal should be hard enough that no extra hardening is required. Since scribers work best with pointy edges, you also need to sharpen it. Malco Adjustable Sheet Metal Scribe Tool (A60) Measure, mark and scribe trim lines on sheet metal in one easy operation. Use the hacksaw to remove the top and sand it so that it fits the plastic. Mark it with a sharpy or use some tape in order not to grind off too much material. Lay both the screwdriver and the filling besides each other and mark where you need to cut the screwdriver's head off, keeping in mind it needs to fit in the hole of the plastic and at the same time needs to have the same dimensions as the original filling. It is also used to check the trueness of the flat surface.Clean the screwdriver in order to be able to freely move up and down the pen (in my case I had to remove the rust with sandpaper).Įxamine the hole in the plastic and notice the dept and width of it. The scriber point acts as a visual reference against which any variation in the workpiece can be judged. This pocket sized sheet metal scribe is designed with 10 pre-set scribing depths from 1/8 to 1. The scriber block may also be used in place of a dial indicator to detect run out (a variation in concentricity) of a workpiece mounted in a four-jaw chuck. The Malco A40 is a Sheet Metal Scribe (Pocket Size). The upright post can be adjusted to tilt back or forward, effectively moving the scriber point up or down in a controlled fashion coarse adjustments are made by sliding the scriber along its clamping block. Brake Press The Brake Press is a tool that has been used for many years in traditional fabrication shops all over the world. Some are less commonly used than others, but offer bending that cannot be achieved with competing processes. The scriber block has pins that can be pushed to protrude through the base these can then be used as limit pins to allow the block to press against the edge of the table, controlling its movement in that plane. Section 2 Types of Sheet Metal Bending There are multiple ways in which a part can be formed. The workpiece is held against an angle plate so that it is perpendicular to the surface plate the scriber block is then adjusted to the required height and used to scribe a line parallel with the table, by sliding the block along the table's surface. A scriber block is used to lay out lines at a set height from the base, thus its second name surface height gauge or just surface gauge.
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