Re: [CAD_CAM_EDM_DRO] Re: Thread milling

I'm not confusing anything with anything. The original poster indicated that "standard" collets have a range of acceptability in regards to diameter. This is simply not true. No gray area. Its one of the very basic fundamental rules regarding "standard" one piece collets. R-8 or 5C. Its a big no-no. Any machinist knows this. Its part of the first day in the shop orientation for new recruits. Not my rule just the industry practice. Taps don't belong in a spindle. Thats why they dont fit. They belong in tap handles and tapping heads...where they were designed to be used.
Ron

Jon Anderson <janders@...> wrote:

R Rogers wrote:

> I was taught and its common knowledge within the ranks that there is
> no such thing as a size range on collets.

Ron,

You are confusing lathe collets with milling chuck collets, which -are-
designed to handle variations within a small range. Though used for end
mills, they are also how virtually all machining centers chuck drills.
DA and ER collets are the most common.

Jon




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