> A less expensive tool would be a end mill. These look like a
> short drill bit
> without a taper on the cutting edge.
Problem with using an end mill is that you have to hold it centered on the
hole. Extra setup, and it's tough to do on a drill press, virtually
impossible by hand.
> The Import stuff isn't too bad, a 1/2
> end mill is ~ 15.00. USA made stuff is 40 + .
A counterbore for a 5/16" SHCS is only $14 at Enco, P/N 368-4120
> Counter bores look similar but have interchangeable pilots that
> add to the cost.
They are also available in fixed pilot versions that are less expensive
(like the one quoted above).
> If you can't find a end mill, resharpening a drill bit to cut flat would
> work, just be sure to drill the hole with a regular bit first.
If you really want to get fancy, grind a pilot on it while you're at it.
> I used to get stuff from Enco, but I think they have been bought
> my MSC tools.
They were, but they're still doing business under the Enco name and (mostly)
at the Enco prices.
http://www.use-enco.com/CGI/INPDFF?PMPAGE=31
http://www.use-enco.com
Randall
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