Interesting discourse. When I did my first pulley ~20 years ago,
I didn't have many resources for asking questions, so I just went
with a single tool with just under 30* point. I basically plunged
straight in until it complained and then started working down the
sides until it was deep and wide enough. Then I just cleaned up
the edges to final size. It was only a 2 step motor pulley, but I
learned a lot. As to form tools, they work pretty well if you can
spin the work fast enough and can jog side to side so it isn't
cutting everything at once. I use a piece of wood planer blade to
grind the profile on and then braze it to a 1/2" square bar at
about a 3* angle and mount it in the QCTP. Of course I did this
before somebody told me I couldn't do it :)
Gman
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Thanks
to all for the info on the types, sizes, & locations
for aluminum (& Cast Iron) to do the job.? It will be
an interesting project.
John
WIlshusen ¨C Thank you very much for the pdf!?
Just the kind of thing I need.
Guenther
Paul ¨C (And the others after him who responded
to the tool grinding statement) Unfortunately I am new to
machining.? I have made & ground 2 or 3 of my common
facing & parting tools.? They have worked out good.?
But, I am lacking in knowledge of grinding different
tools, particularly form tools.? Not to mention that I am
unsure how large a surface cutting area I can safely use
on my lathe with a form tool? (Craftsman 12¡± #101.07403)?
Seems like a can easily get my lathe to bog if hogging out
too much metal at once.? Then gratefully jmartin957
comes along & adds that I should be using facing &
parting tools for the pulley job.? I kind of understand
that, but it leads to more questions.
1)
Any specific suggestions on good YouTube videos or other
instructional documentation on cutting all types of
tools?? I have looked at many.? Some make sense, some not.
2)
jmartin957, are you just saying that say
the normal facing (left or right) tool is used, just
ground at much different angles to accommodate the area to
which you need access?
3)
I am also specifically interested in any knowledge of what
should just not be attempted on my particular lathe?? Like
form tools.? Example would be let¡¯s say a 90 degree form
tool.? One where it would cut a full 90 degrees or ? of a
ball.? Not talking this project, but others.?
Instinctively guess that something that radical would be
way too much for my lathe.? Would a larger ? or 1 HP motor
help or would that just as likely break something as
help?? My lathe currently has what I believe to be the
original ? HP motor.
I
cannot apprentice with anyone so as to watch them and
learn.? So I am stuck with finding what I can on the
internet, which as you know is not always correct
information¡¡¡¡
I know
this is old hat to most, but important to me.? I have the
luxury of being old (retired) and in no hurry.? So, while
I am not trying to learn the trade for pay, I am doing
something better.? Learning because I just want to and
enjoy it¡¡¡¡..
--
Bruce Varner
