Thread Milling
oldjag
Hurco KMB1. The helical milling seems to work pretty well, so I
thinking of trying some thread milling. It appears dedicated thread
mills are a bit pricey for trial and possible error use. Anyone have
a source for surplus thread mills? If the thread mills that cut one
thread groove at a time work okay I may try that first, they seem a
bit cheaper. Eventually, I'd like to thread mill some shallow 8-32
holes in aluminum.
Ed Huntress
"oldjag" <msmit...@comcast.net> wrote in message
news:4b1ff1a7-6b2c-431d...@m13g2000vbf.googlegroups.com...
Just curious, but why would you want to mill threads in aluminum? Unless
something has changed, thread milling usually is applied to materials that
are difficult to thread with a conventional tap.
--
Ed Huntress
Karl Townsend
"Ed Huntress" <hunt...@optonline.net> wrote in message
news:4b0377ab$0$22521$607e...@cv.net...
That, and thery don't make thread mills for that small a size as far as I
know. I've used a lathe thread boring bar as a single point thread mill.
They are cheap on ebay, etc.
Karl
Jon Anderson
> That, and thery don't make thread mills for that small a size as far as I
> know. I've used a lathe thread boring bar as a single point thread mill.
> They are cheap on ebay, etc.
Emuge makes them down to 0-80!
Jon
Jon Elson
range of thread
pitches. They are still expensive, but about half
the price of one
standard thread mill, that can only be used on one
thread pitch.
I got one made by "Micro 100" they are sold by
most of the major
tool distributors.
Jon
oldjag
> "oldjag" <msmith5...@comcast.net> wrote in message
The main reason for think of using the thread mill is because my old
Hurco does not have an encoder on the spindle to do rigid tapping, and
I don't have any experience, (yet), using the floating tap holders
that came with the machine. The rigid tapping looks like it will work
close to the blind hole bottom without switching tools, ie. standard
tap followed with a bottoming tap...
Ed Huntress
That's a good reason. In fact, we had an application or two at Wasino, using
our multi-axis turn/mill machines, in which milling threads just simplified
the total operation.
--
Ed Huntress
Mark Rand
wrote:
You missed out the other main use for thread milling:- Threads that are large
enough for the tap to be a serious amount of money compared with thread
milling :-)
Mark Rand
RTFM
oldjag
> On Tue, 17 Nov 2009 23:27:24 -0500, "Ed Huntress" <huntre...@optonline.net>
> wrote:
>
>
>
> >"oldjag" <msmith5...@comcast.net> wrote in message
Looks like Emuge has a pretty neat thread mill that drills the hole,
mills the threads, and puts a relief groove at the bottom of a blind
hole in one shot.
Ed Huntress
I haven't seen that one, but Emuge makes very nice tools.
--
Ed Huntress
Jon Anderson
> Looks like Emuge has a pretty neat thread mill that drills the hole,
> mills the threads, and puts a relief groove at the bottom of a blind
> hole in one shot.
Some years ago one of my customers was working on a design for a pizza
vending machine. Being involved with them in solving some mechanical
issues, the owner wanted to give me a lucrative contract for some of
said parts. I contacted an engineer at Emuge and inquired as to how fast
one of these could make a 1/4-20 hole .500 deep in extruded aluminum.
I don't recall the specifics of the reply but assuming a 10k spindle and
adequate coolant, I seem to recall about 3 seconds total. Sure looked
like a winner to me, saving hundreds of tool changes a day.
Sadly, the project never went to production.
Jon