woodbrains":3bme4a5o said:Hello,
The man is filing something but not a chisel. TBH the low grade files shown in the picture are made of something like toffee, so likely ineffectual on mild steel for long, let alone tempered HCS.
I assume the compiler of the book wanted a picture of someone sharpening a chisel, picked a photo which should have been in the metalworking section and, not knowing enough about how to sharpen put on a caption to suit. Or something like that. It is obvious from the photo, with all the various forms of file on the bench, the engineers vice and the piece of metal in the vice, the photo wasn't taken to illustrate sharpening whatsoever.
That is not to say Custard or Richard above do not have valid points about obsessional sharpening, just the idea of sharpening with files to illustrate their point was a bit daft, especially since the book was wrong to show it anyway.
Mike.
I agree on all points. I thought the picture was just an error, also, but agree that demanding high grit is an interesting thing. I went through it, lots of us do because it's available and it does make a transient very sharp edge. But that level of sharpness only matters in very very shallow cuts, and we don't often find them in actual woodworking.