In article , James Waldby says...

I guess an "eight of an inch" must be about 0.225",

LOL. One goof and then forevermore I'll be known
as the 225, eighth guy.

Of course it is quarters. You never see a 1.25 diameter
5C collet, but I understand that's what the designation
means - that more or less, the collet is good up to
that size.

Jim

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