We're now moving to the drill press. we're going to countersink all those
holes on the backside and it's a lot easier to do it on the drill press. Plus
you can see how to run the drill press as well. All your speeds on the drill
presses are up here and they're controlled by these levers here. You can
see a picture. And you've got two different speed ranges, one, and two here.
So normally on a countersink, we use a pretty slow speed,
just enough to take that burr off and break the sharp edge. Be careful on the
big holes, you want to kind of pump it like that so that it doesn't jump around.
One thing on drills, on a drill press, not so much as a milling machine,
you've got to be careful because a drill can actually stall on you. This thing
that you see right here is a safety stop. For example if that drill would grab
it'll hit this here also. You don't want to put your hand on there like that
because if it does grab you can see what'll happen to you here. You can drill
holes on there like that original way that we showed you when we did layout if
you want to just spot them like we did and then come over here and do them you
can do that as well. That's a picture what it looks like with all the holes in now.
The holes are now complete. The next step would be, you notice we got a line here,
that means we've got to cut that part off to length on our next thing back on
the milling machine. Also this line right here we're going to solve that out on a
vertical saw and that's going to come out of there and then later we'll be
back on the milling machine again to mill that slot out and then the part
will be complete. We're now ready, the next operation and process is to saw
on our lines that we laid out. And we definitely want to stay away from those
lines cut it's going to be a very rough cut and then we're going to take it
after we saw this out and go back to the milling machine and finish those slots
off. That's why we said that that was a big half inch holes there are just
clearance holes. Now one thing, this is advice that we use
here, a lot of people will not use that they'll hold the part and they'll push
it through which is an accident waiting to happen. Here your hands are away from
it. The other thing is after we saw through on these lines right here we
shut the machine off and we turn it like so. And then we come across the bottom
and you can see that your hands are never near that blade. This thing
protects everything from it.
We're going to shut it off now, make our turn like so, and you see the line on
the bottom there. Again we're going to stay away from that line.
Again you can see how we keep our hands away from the work.
Now on a bandsaw as you go trying to follow a line when the blade begins to
get a little dull, which this one is a little bit, you want to kind of do this
treatment right here where you move a little back and forth because if you just keep
pushing on it that blade when it's a little dull will drift and you'll end up
cutting into your area, which you don't want to do.
And that's all there is to it, all right. Now our next step on here, we're going to
be milling this slot out, what we just sawed out. We're going to be milling this
area here to get a dimension to print here on the width of it. The same way
on this side here. Also we have to mill off of the end here.
We drew a line on there and all that line is for helping us to know where we are. When we get close to
that line we want to measure it with dial calipers. Then we'll finish
it to dial calipers. All right, we took our drill chuck out where we did all the
holes and now we're going to put a half inch column and a #4 flute mill
to do the milling part of this project. So the same process for putting the
collet in as we did the chuck, tighten it up on the top here, hold your brake on
while your turning, gonna have to raise our knee up because we're pretty far
from our work here. And we can come down here also sometimes to save some
cranking. All right we're going to mill the end of this off, so that line that we
put on there for our overall length, we want to make sure that it sticks out
past the side of the vise. Here on this side here, so that we can't run
into that. Because those are hardened steel. So again we tighten up here.
Tap it down and then we're going to come over here. What we'll do is, take a, since
that surface has been sawn off it's not very straight. What we'll do is, we'll go
ahead and take a couple of cuts off of there and then we'll check it with dial
calipers. There are two types of milling. It's called conventional milling and
climb milling. Conventional milling means that, which is what we want here,
clockwise rotation and feeding into the work. For example, right now I want
that's not clockwise we want clockwise. There's clockwise, so I want to feed in
this direction, left to right. And then when I get over here at the end I do not
feed anything into that, okay. I come back all the way over here
and then I feed in (in this direction) which would be turning in this way. And
then we go back again. Then take a cut and you keep doing that. The
reason why we don't want to climb mill is these machines do not have what we
call ball screws, which make up for slack. These have slack in them, so if you try
to climb mill, it's it's not a good situation. So we want conventional
milling ,clockwise rotation, feed left to right. So we're going to come
in, just barely touch. And we want to zero our readout, were zero, zero.
I'm going to feed in on the digital readout about ten thousands. We have
eleven, which is close enough.
And that's all there is to it.
Now the print calls for a dimension of 3 and 1/4, so now we come back over here.
We don't feed any in, so we're going to feed another 10 thousands on the read
out.
Take another cut.
Now we have a straight edge there. We're going to shut off here and we're
going to get a dimension on that with our dial calipers. Bring it in until
they touch, give it a little bit of a wobble and we have three inches and
about four hundred and forty thousands.
Yeah for forty five actually and we want to end up with 0.250, so we
have quite a bit on there to take off.
Now a little bit of patience because this is going to take a while. We don't
want to take too much off in one cut.
I'm back over again.
Feed in another 10 on the digital readout. Always make sure that cutter is
stopped before you stick your brush in there. If it grabs and pulls,
tendency is to try and pull it out and that's not good.
We are right now at 3.40 so we've still got a ways to go.
All right, this should be our last cut now.
Our reading is 258 thousands and we're within tolerance now, so we're
going to hang it up.