Frank Erskine wrote:
On Fri, 1 Jun 2007 21:28:38 +0100, Andy Hall
wrote:
Most of mine are 12,7mm with a few 6,35mm.
Is there any real significance in this '12·7mm' and '6·35mm' stuff?
Why not or π inch, which it really is?
Well one reason is that as our cousins across the pond are always
bitching about, sheet material is now 6mm, 9mm, 12mm and 18mmm. They all
have 1/4", 3/8", 1/2" and 3/4" cutters. So their panels are always
rattling in their grooves.
Only 3/8"/9mm is close enough not to matter.
So for straight cutters and rebaters it matters and it pays to care.
Peter
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