Hello welcome to Enots engineering I'm Alan in today's video we'll be turning it a
couple of morse tapers and making some attachments this one's for a center
drill and this one is for a small revolving center. Both are turn between
centers we use two methods one is the compound slide set at the angle to turn
the taper and the other was using the tailstock offset to set the angle to
turn the taper So let's see how we got on. I've just set this bar in the four
jaw chuck and I've clocked it up within a couple of thou it's sticking out of
the Chuck about eight inches so just clocked it up here this bit of weld here
is from the steel stock holder where they welded two bars together when they
were chopping them off to lengths and this is the end of the bar. So what I
want to do on this is just turn this lump off face it up Center it and then
turn it round and did the same on the other end
turn around in the four jaw chuck and do exactly the same on the other end
I'm just fitting this carrier onto the bar and where the chuck was I've fitted
a center and the driving dog it should be this this bolt so this this is
driven around by the the motor which drives the carrier and on the other end
revolving centre the two ways I can do this taper one is to alter the compound
slide so it's parallel with this by using a dial indicator then I know I've
got the taper or the other ways offsetting the tailstock so I'll set the
compound slide to mimic that angle so as I'm running up that collet it's just
less than a thou. There from zero to ten is one thou. I will now put the part back
in the lathe and replace the dial indicator with a cutting tool .Machine it
so it's true for that length before I start cutting the taper
this is that's about 0.825" diameter number two morse tapper this one
is O.732" point seven three two
that's point 0.76 which is still bigger than I need but at least now this
is parallel I've turned it so that the tool is at the end of the travel for the
compound slide set it to the end
it's just starting to enter number 2 collet I'll have to change my method of
doing this taper the tapers right the angles right but that is the furthest I
can travel on the compound slide which is not enough for a proper Morse taper
being that this was made on this lathe it's not long enough because you have to
have an injection pin put in the end then. This is a proper Morse taper collet you
see the tapers to there which would mean I've still got another half-inch at
least of taper to turn on there which I can't do because my top slide is at the
end of its movement there and at the end of its movements here so the only way I
can do this now is use this taper because it's related to the length
between centers offset my tail stock so that this taper is parallel to the tool
slide. That will give me two advantages one when I turn the bar round I can do
the taper on the other end no problem the second advantage is I can use my
traverse instead of the compound slide handle which will give me a better
finish so now what I will do is put the dial indicator back in get the dial indicator
running zero zero on this machined surface by offsetting the tail stock
this lathe the zero marks are on the back here of the tail stock and this is
one of the screws and there's one on the opposite side and it pulls the tail
stock top toward you or away from you depending on which one you tighten. What I've done
now is I've set the tail stock and you can see put a dial indicator in it and
I'm just touching it onto the end there the finish is a bit rough but you can
see when I come down this end it's still near the zero use that as my starting
point I've locked it up at that
put some micrometer blue on there so it's touching there there probably wants
to alter a bit so that it's taking more off the top. it's not touching there its
touching at the top so it wants more of the top so I'll just tightened the back of the tailstock
and slacken if off at the front
touching
I've got a problem already you can see there with that cut the tool post has hit
the revolving centre this is one of the reasons I'm making this to stop this
problem this revolving centre the diameter is far too big so it means
you've always got to have your tool sticking out far more than I would like
to try and see if I can get it clear
start again
you see it's just coming now that's probably about the right length in the
hole where I think that just needs a polish you see on this end it goes through that
should eject okay so all I'm going to do with that is polish it
I can't get that off once I've put it on there. So the taper can't be that far out
I just finished the second end so now I've got two morse tapers and what I've
done is just put a slight diameter on the end there so when this goes into the
morse taper it clears doesn't lock up on the bottom and that when you eject it with a drift
it will eject on that diameter and not on the edge of the taper
I've done that on both ends. this one is now on the zero mark
all I've got here is a bar.
I've faced it and centered on each end then I've put it between centers and turned
its diameter it doesn't matter what the size is we're going to do is put the bar
between centres move the dial indicator down put the dial indicator square
and roughly on center I've got a flat end on this dial indicator you can see through the
cutout there we go
I'm bringing it in just go around 3/4 of a turn to zero remove it from the
Centers move the dial indicator down to the other end turn the bar round and put it
back in centers put it back on the bar in the same position and it should reach zero. so now
if I adjust the tailstock it comes to zero
Lock the other side
I've put piece of sheet metal there just to
protect the surface that I've turned
I'll saw that off the rest of the way
so the next job is to drill - two holes and tap. to hold that in and then that gives me a
center that the diameter is a lot smaller so I can get my tool in closer
and the tool post won't hit the outside
and this one the other one I did Is a center drill holder the centre drill
goes in I will just drill and tap the side for a grub screw
that's it for today to finish Parts.
I hope you enjoyed it and I hope you see
you next time I need on Enots engineering