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Posted by Trevor Jones on April 12, 2006, 6:13 pm
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Tom Gardner wrote:
> > Lesse....
> > McMaster Carr item 3067A11 in hss, 2790A71 in cobalt steel. Pg.2249 in
> > cat #107 So these numbers may or may not be any good.
> >
> > Cheers
> > Trevor Jones
>
> It helps to be looking for something using the right name for it...Duhh.
> What catalog do you have? I have 111 and 112 and I found the mill but
> nowhere near your page numbers. (How do you like that, I now get a new
> catalog from them every year rather than every other year as before...I'm
> quite impressed with their service and even their prices lately.)
Uhhhh.... That would be cat # 107, same as before.
:-)
Cheers
Trevor Jones
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Posted by Tom Gardner on April 12, 2006, 10:32 pm
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> Uhhhh.... That would be cat # 107, same as before.
>
> :-)
>
> Cheers
> Trevor Jones
I was just testing you to see if you would stick to your story.
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Posted by DoN. Nichols on April 14, 2006, 5:33 pm
Please log in for more thread options > Imagine a 1" cube of O-1 with a 1/8" slot milled 9/16 deep through the
> center of a face. I need to put a 1/16" radius on the two edges on one of
> the sides. The last one of these I made took hours with itsy-bitsy
> (technical term) files and emery paper. I have a "Round-over" end mill with
> a 1/2" radius but I've never seen one that small. Do they exist? I DID
> Google and looked at catalogs for all the usual mill suppliers. I could
> make it in two parts but that would be a wash, time wise.
It sounds to me as though you would do better in cutting the
slot with a conventional milling cutter (for a horizontal spindle mill)
instead of an endmill, and while we're about it, (assuming that you will
be making enough of these to make it worthwhile) you can get another
milling cutter a bit wider reground by a good sharpener to produce the
radius on both sides at the same time. Perhaps even one could be ground
to produce the slot at full depth and both radii in a single pass, so
you don't have to be constantly changing cutters.
Good Luck,
DoN.
--
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
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Posted by Robin S. on April 14, 2006, 7:36 pm
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> you don't have to be constantly changing cutters.
Or build a simple fixture to run both (or all three) cutters at once. If the
run was long enough, a fixture could be made to hold multiple parts for each
operation. This of course assumes the part would be run on a proper
horizontal using an arbour with the ground spacer bushings.
I'm not sure having one cutter for both the slot and the rad would be a
great idea. If each rad and the slot are cut individually, all the cutters
are probably off-the-shelf. Specially ground cutters are expensive to buy,
expensive to sharpen, and expensive to replace in the case of a crash.
Regards,
Robin
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Posted by DoN. Nichols on April 14, 2006, 8:55 pm
Please log in for more thread options >
>
>
> > you don't have to be constantly changing cutters.
>
> Or build a simple fixture to run both (or all three) cutters at once. If the
> run was long enough, a fixture could be made to hold multiple parts for each
> operation. This of course assumes the part would be run on a proper
> horizontal using an arbour with the ground spacer bushings.
>
> I'm not sure having one cutter for both the slot and the rad would be a
> great idea. If each rad and the slot are cut individually, all the cutters
> are probably off-the-shelf. Specially ground cutters are expensive to buy,
> expensive to sharpen, and expensive to replace in the case of a crash.
You could even stack the two radius cutters and the slotting
cutter to do it all in one pass -- except that the conventional radius
cutters which I have seen tend to have a bit too much meat to even go
into the 1/8" slot, which is why I was suggesting a custom tool.
Enjoy,
DoN.
--
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
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> > McMaster Carr item 3067A11 in hss, 2790A71 in cobalt steel. Pg.2249 in
> > cat #107 So these numbers may or may not be any good.
> >
> > Cheers
> > Trevor Jones