hello welcome to Enots engineering i'm Alan in today's video i want to make an adapter to fit
my boring head onto a number two morse taper it will be similar to this but this is an r8 adapter
it has a one and a half inch 18 unf thread at one end and this would be a number two
morse taper at this end now i know you can buy these for about 22 to 23 pound but the
problem is i need it now not in two weeks time so let's go into the workshop see how i did it
this is what i want to make today it's going to be made from some mild steel bar
we have a number two morse taper on this end and a one and a half 18 unf thread on this end
and it holds my boring head into a morse taper so on this end i've got a four jaw chuck
set a 50mm bar in the chuck and got this running as true as i can then i've fitted my fixed steady
dial indicator on this end and got this running as true as i can
see there it's running out about 0.003"
so what i want to do is face off this end centre drill it so it'll accept the centre
then i can remove the fixed steady fix the centre there and start to turn the outside
okay now i'll take my fix steady off
i've machined this part down to 20 millimeter for a length of 85 and i've just skimmed this
to get it running true and then what i want to do is part this off 108 millimeters from the end
now normally when i'm parting off in the four jaw chuck between the center
i do get a lot of vibration if necessary i can take it out of the four jaw chuck turn it round
put in the three jaw chuck so all this would be held in the chuck and then just part off this end
so we'll see how we go so i'm running on the about 210 rpm
see the vibration straight away that will go when i get to a certain depth but because of the length
and the weight of the part i don't want to risk it at the moment
so what i'll do is i'll take this out the chuck
and put in the three jaw chuck and see how that goes
okay from this angle you can see
about about four inches inside the chuck here
this is where i'm parting off and i'm just supporting this with the center on the end
i'm not going to go straight through because this is a heavy block of metal to be hitting my lathe
so if i can get to about a quarter of an inch diameter then i'll saw it off the rest of the way
and what i'm doing to relieve the pressure on the blade i'm just going to widen the slot a bit
i'm just going to slacken the blade off and push it out a bit further
and then tighten it up again
that's because the bar is nearly touching the face so now we should have a
little more depth on there
to carry on
it's about three or four millimeters left bottom of that so i can take this out
I should be able to break this off
that's my best parting off tool still using the original tip it's been about three or four months
i haven't put any oil on there
face that off centre drill it
48.5 i need that about 47.
47.14 that'll do
that's what we've got so far blank piece there for the morse taper
blank piece there for a one and a half inch 18 unif
centering on each end so now i can set this up between centers
turn the taper and then cut the thread
and we'll finish that off next week oh well that's it for today hope that was useful
hope you enjoyed it look after yourselves and we'll see you next time on Enots engineering