What's the name for this edge profile? - Router Forums
 
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post #1 of 8 (permalink) Old 02-03-2015, 07:25 AM Thread Starter
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Default What's the name for this edge profile?

The top one of the two profiles in the attached image, with both sides fully rounded-over, would be called a bullnose (Google thinks so anyway). What about the second profile, where just a portion of the round-over bit has been used on each side? Would you still call that a bullnose? Or is there some more specific name for it?
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post #2 of 8 (permalink) Old 02-03-2015, 08:10 AM
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On this side of the pond its called a bullnose Bullnose Router Bits: Radius, Cove Edged, Convex & Plunge Router Bits

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post #3 of 8 (permalink) Old 02-03-2015, 08:33 AM Thread Starter
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Aha! Thanks Bill. The "bullnose half radius" cutter on that page is the exact one.

The description of that cutter says "Cuts a shallow arc—the fingernail shape—rather than a full 180-degree roundover." I think fingernail or thumbnail profile may have been the term I had in the back of my mind.
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post #4 of 8 (permalink) Old 02-03-2015, 09:20 AM
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Bottom one = Thumbnail
Top one = 1/2 round = full radius.
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post #5 of 8 (permalink) Old 02-04-2015, 09:34 AM
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I was going to suggest "calfnose", but after holding my hand up to my screen, I like "thumbnail" a lot better.

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post #6 of 8 (permalink) Old 02-04-2015, 04:22 PM
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Along the lines of what Pat said, the router bits that make the profiles are known as Bullnose (top) and Finger Nail (bottom). both can also be generated with rounder bits of appropriate diameters with two sets of cuts.

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post #7 of 8 (permalink) Old 02-04-2015, 06:59 PM
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Now I am confused. We all agree the top profile is a bullnose (I wonder where that name came from? I do not recall seeing the nose of a bull that looked like that) but is the bottom profile thumbnail or a finger nail?

My source: the online MLCS catalog:
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"Teach your children what we have taught ours, that the earth is our mother. Whatever befalls the earth befalls the sons of the earth. The earth does not belong to man; man belongs to the earth. Man did not weave the web of life; he is merely a strand in it. We do not inherit the earth from our ancestors; we borrow it from our children."
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post #8 of 8 (permalink) Old 02-04-2015, 10:20 PM
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Hi Andy

The top one is a (half-round) bullnose, I'd refer to the lower one as radiused, or more correctly broken-edge radiused (because of the arrisses). That's UK terminology

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