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Posted by Peter Neill on October 13, 2006, 4:42 pm
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Sometime in the next few weeks I may have a need to do some fairly
wide flycutting on some Aluminium plates. Depth of cut won't be really
large, just enough over a few passes to get it quite flat.
The problem is these plates will be about 10"-12" wide and around 18"
long.
I have a cheap import R8 clone flycutter, but this won't do any more
than around 6" wide safely, as I don't really fancy hanging a great
long bit of HSS off the side of it.
So for those of you who do face stuff off around this width, what is
the best way to do it? Any special/favourite designs for a cutter, and
do you clamp it to the spindle or rely on the taper/drawbar? And what
about tool orientation - should I go with a cutter on a shallow angle
to the surface like the current one, or mount one vertically down in
whatever is used?
Bear in mind that I have to do this on a Bridgeport, with R8 probably
being the limiting factor.
Peter
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Posted by mark on October 13, 2006, 4:58 pm
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Peter Neill wrote:
> Sometime in the next few weeks I may have a need to do some fairly
> wide flycutting on some Aluminium plates. Depth of cut won't be really
> large, just enough over a few passes to get it quite flat.
> The problem is these plates will be about 10"-12" wide and around 18"
> long.
>
> I have a cheap import R8 clone flycutter, but this won't do any more
> than around 6" wide safely, as I don't really fancy hanging a great
> long bit of HSS off the side of it.
>
> So for those of you who do face stuff off around this width, what is
> the best way to do it? Any special/favourite designs for a cutter, and
> do you clamp it to the spindle or rely on the taper/drawbar? And what
> about tool orientation - should I go with a cutter on a shallow angle
> to the surface like the current one, or mount one vertically down in
> whatever is used?
>
> Bear in mind that I have to do this on a Bridgeport, with R8 probably
> being the limiting factor.
>
> Peter
Dunno mate
I've seen flycutters that are a ten inch alluminium disk with an arbour
Then you would only have to let 1 inch hang out .
You could soon knock one of them up.
Cant see much going wrong with the above if you take light cuts.
and you balance it
or a peice of steel sort of ten inches long and 2x1. arbour in the
middle..with a small peice of hss in the end of it.
all the best.mark
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Posted by Mark Rand on October 13, 2006, 5:08 pm
Please log in for more thread options wrote:
>
>Sometime in the next few weeks I may have a need to do some fairly
>wide flycutting on some Aluminium plates. Depth of cut won't be really
>large, just enough over a few passes to get it quite flat.
>The problem is these plates will be about 10"-12" wide and around 18"
>long.
>
>I have a cheap import R8 clone flycutter, but this won't do any more
>than around 6" wide safely, as I don't really fancy hanging a great
>long bit of HSS off the side of it.
>
>So for those of you who do face stuff off around this width, what is
>the best way to do it? Any special/favourite designs for a cutter, and
>do you clamp it to the spindle or rely on the taper/drawbar? And what
>about tool orientation - should I go with a cutter on a shallow angle
>to the surface like the current one, or mount one vertically down in
>whatever is used?
>
>Bear in mind that I have to do this on a Bridgeport, with R8 probably
>being the limiting factor.
>
>Peter
How well is the mill head trammed? Wide cutters make it harder to get a flat
finish according to St. George. If you really want it flat, use a smaller
cutter and go up and down more.
Mark Rand
RTFM
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Posted by Peter Neill on October 13, 2006, 5:21 pm
Please log in for more thread options On Fri, 13 Oct 2006 22:08:30 +0100, Mark Rand
>
>
>How well is the mill head trammed? Wide cutters make it harder to get a flat
>finish according to St. George. If you really want it flat, use a smaller
>cutter and go up and down more.
>
>
>Mark Rand
>RTFM
The tram is pretty good, thanks to some very large parallels in a lot
I picked up at an auction. They are 300mm x 70mm x 35mm and make it a
doddle to swing the clock around on them.
I thought about doing a couple of passes but I really want that nice
uniform finish *and* flatness too<g>.
Peter
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Posted by Kevin Steele on October 14, 2006, 9:08 am
Please log in for more thread options On Fri, 13 Oct 2006 21:42:03 +0100, Peter Neill
>
>Sometime in the next few weeks I may have a need to do some fairly
>wide flycutting on some Aluminium plates. Depth of cut won't be really
>large, just enough over a few passes to get it quite flat.
>The problem is these plates will be about 10"-12" wide and around 18"
>long.
>
>I have a cheap import R8 clone flycutter, but this won't do any more
>than around 6" wide safely, as I don't really fancy hanging a great
>long bit of HSS off the side of it.
>
>So for those of you who do face stuff off around this width, what is
>the best way to do it? Any special/favourite designs for a cutter, and
>do you clamp it to the spindle or rely on the taper/drawbar? And what
>about tool orientation - should I go with a cutter on a shallow angle
>to the surface like the current one, or mount one vertically down in
>whatever is used?
>
>Bear in mind that I have to do this on a Bridgeport, with R8 probably
>being the limiting factor.
>
>Peter
There are plans in "The Shop Wisdom of Philip Duclos" for a 10" fly
cutter to fit an R8. He recomends about 160rpm for aluminium. Drop
me an email off-list if you want me to send you a copy.
Regards
Kevin
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> wide flycutting on some Aluminium plates. Depth of cut won't be really
> large, just enough over a few passes to get it quite flat.
> The problem is these plates will be about 10"-12" wide and around 18"
> long.
>
> I have a cheap import R8 clone flycutter, but this won't do any more
> than around 6" wide safely, as I don't really fancy hanging a great
> long bit of HSS off the side of it.
>
> So for those of you who do face stuff off around this width, what is
> the best way to do it? Any special/favourite designs for a cutter, and
> do you clamp it to the spindle or rely on the taper/drawbar? And what
> about tool orientation - should I go with a cutter on a shallow angle
> to the surface like the current one, or mount one vertically down in
> whatever is used?
>
> Bear in mind that I have to do this on a Bridgeport, with R8 probably
> being the limiting factor.
>
> Peter