Are you always this clueless? There are true spiral cutterheads available through other mfgrs. sigh.
Dave
Larry Jaques wrote:
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19 years ago
Jointers and Planers, Oh my!
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19 years ago
oh, Google "oliver jointer". olivermachinery.net
Sometimes I wonder why I bother...
Dave
David wrote:
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19 years ago
I doubt it. A spiral is shaped like a cone. Helical cutterheads, yes. As for Larry, usually.
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19 years ago
It's not named correctly either.
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19 years ago
Because if it were, it would be called a helical stair.
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19 years ago
Because it is not a spiral. I just looked it up and, like a lot of words that are commonly misused, the definition of spiral has been bastardized. In my line of work, where geometric correctness is important, no one would ever interchange the terms.
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19 years ago
...regarding "spiral" vs "helical"...
...
...
From 1a (emphasis added)... ...around a central point
"It" here refers to the central point (axis). The definition isn't all that well written, but is basically correct. If the stair diameter increases or decreases as the elevation changes, then it is a spiral--if it doesn't (as most) it's a helix.
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19 years ago
On Tue, 22 Mar 2005 04:19:26 GMT, the inscrutable "Don" spake:
Well, "while continuously receding from or approaching it" describes a cone perfectly, Don. CW is right. Couldn't they more correctly be called "helical stairways"?
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19 years ago
...
usage...
The geometric definition of a helix is the straight line drawn on the surface of a cylinder. The Oxford dictionary lists the first definition (common usage) as "spiral". From a geometrical viewpoint, the rail of what you defined as a spiral stair is, in fact, a helix.
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19 years ago
On Tue, 22 Mar 2005 17:11:04 GMT, the inscrutable "Don" spake:
No, it's a coil, a helix.
That's marketing terminology for you.
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