hello welcome to enots engineering i'm Alan in today's video i'm looking at planning
and making a small cover for the cross slide oiler that i made in the last video
we look at how to design the part how to manufacture the part why is it made of steel
and then why couldn't i have printed it out on a 3d printer now one of the reasons is
i want it made of steel because i want to use magnet to remove it we'll also look at
parting off and sharpening the parting off tool so let's go into the workshop see how we do it
here's the lathe all reassembled and I've touch up some of the paint work so it looks a bit better
so in the last video we machined out this grub screw put a hole through that leads into the
bronze nut on this slide so if i put oil in there it will go straight into the thread
in the nut but now i want to stop any bits of swarf entering the rub screw and getting into
the nut so i'm going to make a little cover for this the cover i'm making it out of steel
so i can use the magnet to remove it and we'll have to plan how we're going to do this
we need to have a hexagon
i think it's about 5/32 on the end of a bar and this will be a diameter
so this hexagon can fit into the end of the grub screw and the
diameter will cover the area if we look at the side view we've got the diameter a
hexagon that length would be about 5mm
the diameter on this end needs to be about 16mm millimeters so it covers the end of the bronze nut
okay so we need piece of steel at least 16mm diameter
and we're going to machine a 5/32 hexagon on the end which is 5mm long
so the easiest way to do this is to turn the hexagon down first
and the 16mm and leave this connected to the bar so i can then part it off here later
i found this small scrap of steel that should be enough to make the part i need
let's put that in the chuck
set my tool
switch the lathe on
first of all i want to face off the piece of steel
now i need to turn that down to a depth of 5mm
16mm
so i'll leave that at that
i'll just face this off
and that's ready to have the hexagon machined
that's the part that we machine in the lathe i've actually reduced the od
of that on the back here to fit this collet which is a three-quarter inch collet
and the collets held in the milling machine vice and this time i'm holding it on the
flat on this hexagon collet block just put a parallel strip on the on the vice
so that the the nut on the back touches the jaw now i can tighten that up and when i loosen
it and move it around i just make sure that the nut on the back touches a jaw each time
this is a 12mm end mill just tighten this collet up
turn the tool so that the cutting edge lines up with the face then just move this in
until it touches the face and zero my axis
move the tool down to just touch the part
taking a 0.007" cut
and it's also taking a small amount off the face
0164"
now i've turned it round to the next face and i'm taking the second cut
slacking the vice off turn it around
engage the nut onto the jaw face
tighten it up make sure it's down then come back in
and keep machining each of the faces until you have the 5/32 across the flats
now i've gone around once tried it in the
cap head and it's a little bit tight so i just want to go around take a thou or 2 off
there you can see hexagon on the end
the next thing i want to do is just take off the sharp edges
and part this off so it's back to the lathe i just need to face a little bit off the hexagon
that's the screw that should fit
when it goes on it's just about 2mm
too long so face a bit off the end until the screw touches the face
right that just touches the face there now so what i need to do is part this off come across
start the motor off
i think i'll just show up the tool up
that's the tool and cutter grinder i'm going to set the table to 6 degrees
so i'm holding it against the edge of this
which is square
just taking the edge off there there's no point in grinding it all the way down
it's just the tip that i need to do see if that's any better
now as i'm going in i'm speeding the machine up which i couldn't do before as the diameter gets
smaller i'll speed it up and that way it's keeping the constant cutting pressure into the part
now before i part it right off i just want to take the sharp edges off these two
i've changed the tool back to the normal turning tool
take the edge off again
this is the hole i'm trying to stop
any swarf going down i drilled the grub screw out so i can put oil in there and
it'll go straight into the nut and this is the part we've just made that should go in there
covers there stops any swarf going down now when i want to take that out
all i do is take a magnet its a magnets on there put it on the top it takes it out
that's just a little cover stop swarf going down the hole well that's it for today hope
that was interesting hope it was useful and we'll see you next time on enots engineering