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On Mar 4, 8:38 am, Ed Huntress wrote:


Can you say Sunnen hone?

I can say it. I just can't afford it.

--
Ed Huntress


The used ones are not all that expensive. There is one on Ebay with a
$1200 buy it now, and several more at under $2000 . But they are not
exactly hobby machines. I could probably figure out a use for one
every year or two. The same money could be spent on a vertical band
saw and that would get a lot more use.

Dan
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True, that.

If you've never operated a Sunnen, it might be hard to understand how useful
one can be. They shine the very best in circumstances that would normally
border on the impossible for the shop---such as sizing small bores with
precision, especially if they're made of hardened materials.

Older models, such as the 1290-D, are not all that expensive. The real
cost is in the mandrel sets.

In this instance, Gunner most likely knows of at least one shop that is so
equipped. If they happen to have the proper sized mandrel, it would take
only a couple minutes for an operator to resize his sizing die. That's the
direction I'd pursue if I was in his position. Attempting to grind such a
small diameter could prove to be rather difficult, especially considering
the lack of quality in the spindles of most small devices. For a swaging
die, finish should be quite good----a tall order from a cheap spindle.
By sharp contrast, a hone would yield a wonderful, round, straight hole.
They're very capable of correcting all manner of errors in bores, and
require no setup. Install the mandrel, turn on the spindle and start
honing.

Harold

Harold