Thread: DMTs & does anyone have a micrometer?

Originally Posted by Chrisl

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So........How thick is a piece of black electrical tape? How thick is scotch tape? If the thickness of tape can interfere with the overall honing process (unless the tape is kept on the spine from start to finish), is a tape's thickness dramatically far off from .001"??? I wonder. I have no micrometer to check, but maybe one of us does?

My black tape mikes out to right around 0.007".

Why do I bring this up? What do I want to find out? I want to know if in fact .001" variance from flat will have absolutely no effect on honing a razor (this assumes the razor is flat). Maybe I'm making a mountain out of a mole hill, but I'd like to know.

Removing 0.007" of tape from the spine will change edge angle (per side) by about 0.5348 degrees on a 6/8 blade and about 0.4584 degrees with a 7/8 razor.
EDIT: Half a degree on a 7 to 8 degree bevel is quite a change when sharpening.

So a 0.001" change from edge to center of a 8" DMT is an angular change of about 0.014 degree. Fourteen thousandths of a degree variance is plenty good enough for razors (IMO). I know, TMI...