I have need of an old tool called a 3 cornered scaper. It is at firs
sight, similar to a triangular file, with no teeth. Does anybody kno of a place in the UK where one can be purchased? Or failing that, I wa informed that such an implement can be manufactured from a afformentioned triangular file, with the teeth ground off it by grinding wheel, and three fine edges left on it. Does anyone have an experience of this
-- doc
Not in the UK, but MSC has the imported ones on sale in their September flyer, $2-$5 depending on the size. At that price, stock up. Surely they'll ship across the pond.
Gary Brady Austin, TX
Chronos have them
You cam make one from a three-cornered file. It takes some time and patience. I have several but the best one is made by grinding one side in a curve. This curve meets the two other (straight) sides in a point. This makes a much more versatile tool.
Ken.
if you have a piece of hex stock, put a setscrew in the middle of one of the flats and bore/drill a hole to fit the major od of the old file. lock the file with the setscrew onto a flat side of the file. holding the flat side of the hex down on the grinder rest, stroke the file across the face of the grinding wheel. rotate every other flat until the ground edges start to meet. I prefer a slight curve at the front of my scraper / burr knife but our tool maker prefers the front end of his just on some kind of angle because of the life he gets grinding it that way. I have made them also with the shank of old drills that are large enough.
Also called a bearing scraper. I got one locally, german made, $15; wood handle falls off, tho. :( If Gary's MSC items are similar, indeed, stock up!!
IIRC this is also known as a bearing scraper - at least that's what I bought from Pascal Hardware about 25 years ago ($1.49) Gerry :-)} London, Canada
You can make one with a steady hand and some patience at the grinder. You just don't want to let it get any hotter than you can comfortably hold, so lots of dipping it in water to keep it cool. If you are comfortable with basic heat treating, just grind the heck out of it and reharden after the fact.
Any machine tool supplier that stock deburring tool sets will have them as well, in smaller sizes, anyway. The Shaviv brand kit in my toolbox has two triangular tips, one about 1/8" across the flat, the other about 1/4".
Cheers Trevor Jones
The scraper if it is the same one - is a sheet of metal that is a triangle - each edge is made a scraper. The center is then screwed into a long handle. I've never seen a long one. Would think it hard to use.
I suppose you could grind down the faces if you could hold it somehow.
Martin
Martin Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net NRA LOH, NRA Life NRA Second Amendment Task Force Charter Founder
doc wrote:
I don't know where to get them in the UK, but I know several places in Germany where you can get them.
Karl Fischer GmbH in Pforzheim (terrible web site design, and only in German too
You can order a print catalogue here:
I guess you'd have to email them, if you want a catalogue from them
This kind of scraper is a commonly used tool by goldsmiths. I have several, and use them daily to remove burs etc.
I have made several from triangular hand files also. Do not use a grinding wheel to take off the teeth of the file, but rather a stationary belt sander. Fast and precise.
Abrasha
Jeweler supply house. Karl
I just caught up with your post Garry. A bearing scraper (at least the ones I have seen) have all three sides gently curved. My design has two sides as straight as I can get them with the third side curved (rather sharply) to meet the other two in a sharp point. This allows the tool to get into an internal shoulder as well. I don't know how many times I have stabbed myself on the point of this tool but it also lends itself for use as a scriber in a pinch.
Regards. Ken.
Hi, The tool is pretty common in brass musical instrument repair. Ferrees music here in the US can mail you one. They are on the web somewhere. I just picked up one at a hardware store that was closing... mine was made in china so if you have any of the stores there that sell Chinese tools you might find one.
LB
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