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In article ,
(Charles A. Sherwood) wrote:

And as long as I'm wasting all this time on detail considerations, I'm
wondering if the two inch head will do me or if I might not be better off
with a 3 inch head for heavier jobs that might come up. APT has a 2-1/2

I bought a 2 inch criterion and I use it a fair amount and I really like
it. Its very smooth and pretty easy to hit the target diameter.
Based on that I decided that I HAD to have a 3 inch one. I don't think
I have ever used it.

Remember that 2 inch heads use 1/2 inch bars and that 3 inch heads use
3/4 inch bars. I think that fact alone prevents you from using a 3 inch
head for small holes because the 3/4 inch boring bar have big heads that
will not fit inside a small hole.

chuck

Chuck,

Good point. It occured to me there could be a compromise in that a 3
inch head can do larger/heavier than a 2 inch trading the ability to do as
small as a 2 inch. However, the particular Criterion I picked up on eBay
came with all kinds of extra goodies including an adapter sleeve that
steps the 3/4" tool holder bores down to 1/2" so that I can mount the
smaller 1/2" boring bars (also included).

That and several other extras got the better of my impulse purchase
inclinations so I went for this 3 inch head as much because this
particular deal came up just when it did as for the added heavy duty
capacity that I may or may not have a true need for.

It arrived this morning and looks like it will work out for me. That
said I'm sure I would have done just fine with a 2 inch head. In the
long run I can always put this 3 inch back up on eBay if it works out a 2
inch would better serve my needs.

Dennis