Re: [atlas_craftsman] A possible alternative to a tool post grinder?
I cannot open these photos. Some sort of account seems to be needed.
On Wed, Apr 1, 2009 at 11:15 PM, PeterH <peterh5322@...> wrote:
> This uses a common Horror Freight die grinder, with the AXA boring
> bar holder shortened on the right side to make operating and tool
> changing easier.
The total lack of evidence is the surest sign that the conspiracy is working.
- I use a Dumore 10-351 hand grinder in a matching tool post mount. This tool post mount is designed to go around the neck of the Dumore with set screws and has a rectangular blade sticking out the side for mounting it in an AXA (in my case) tool post. Trouble is, the tool post mount is a discontinued item and Dumore said they only had 4 left.
The 351 grinder screams away at 22,000 rpm unless you get a little cheapie motor control for it (like the ones from Harbor Freight), and it comes with 1/4" and 1/8" collets only. For an additional extortion you can get a small Jacobs chuck that replaces the collets and opens up to 5/32" or so.
For a 6" Atlas the Dumore is a little big but it works really well.
[Non-text portions of this message have been removed]
I use a Dremel tool with a flex shaft that I mounted in a boring bar
holder that came with my new QC tool post. The hole was too big to clamp
around the 1/2 inch handpiece of the flexshaft so I made a reduser in
the form of a split sleeve that was 3/4 " outside diameter by 1/2 "
I can now adjust it up and down with the tool holder or in and out with
the travel screw on the compound. I left enough of the handpiece
sticking out so I can readily change tools without removing the
handpiece from the boring bar holder. I am also lucky that I have a
reversing motor on the lathe so I can run the workpiece in reverse while
I grind with the Dremel. That way the grinder and the workpiece are
rotating in opposite directions, Works like a charm for cutting off or
face grinding smaller pieces. Bob H.
--- In email@example.com, Bruce Freeman <freemab222@...>
> I don't know that I'll ever need a tool post grinder, but I happened
> across the picture in the Manual of Lathe Operation.
> Looking at that bulky, heavy motor mounted on the compound rest, I
> can't help thinking there must be a better way.
> Happens, I've got a milling attachment and a Fordham (flexible shaft)
> tool. It occurs to me the flexible shaft tool end could be mounted in
> the vice of the milling attachment and provide some grinding ability
> comparable to a tool post grinder. I haven't tried this, but rather
> am fishing for reactions from the peanut gallery. Any comments?
> The total lack of evidence is the surest sign that the conspiracy is