I have the criterion 3-inch boring head
in with a solid rock machine shop
reducing inserting here so I have a half
inch shank now this boring bar holds a
three-quarter holes in it has three
quarter holes in it it's just put that
way for larger tools but this way I can
use smaller tools on this really nice
big boring head lots of mass I like that
using the big ones this is really nice
and now we're going to come down here and put make this seven hundred thousandths deep
all right 700 now we're going to go
right over here and do this other one
I'm set up with the Dro to drill the
hole pattern the four holes that need to
go in here there's going to be two
hundred thousandths deep I'm using me my
little depth stop here on the mill I've
set for two hundred thousandths and I've
set up the Dro like I said to do a four
hole bolt pattern at a half inch
diameter
I don't know if you see it that the
drill is had shifted off to the side a
little bit so I'll fix that I'm going to
use a small center drill to kind of spot
these and
well that center drill doesn't look very
good
yeah spot these this
I'm going to go around and spot em all
alright a 4-40 tap in here now I didn't
have the kind of wanted so this one here
I made into a bottoming tap the ground
the tip of it off okay left it like two
threads one and a half threads tapered
on the end what I have in here is a
spiral point one as you can see so I'm
going to run this in there first and get
the thread started and then I'll take
this one by hand and run it through
there and get the threads to the bottom
of the hole and I'm just turning this by
hand slight down pressure just to
neutralize it just so I can feel it
I'm just going to run around and do that
to all of them
I got them all started and I'll just
take this one I should be able to get
started in there
