Hello and welcome to Enots engineering I'm Alan this video is part 2 of making
a tap guide that fits in the tailstock it locates in the center of the
tap and guides the tap when tapping a part held in the chuck.
This design is based around the spring taken from a liquid soap dispenser
these pump type dispensers have different spring sizes but you can modify the design
to fit the spring that you have in the dispenser
this is the finished item
so let's go into the workshop and see how we make it
this is a piece of silver steel held in the three jaw chuck
I've just faced the end off it's sticking out this far because I
want to turn the whole length down to 8mm I don't want to move it
in the Chuck once I've started so this end I'm going to put a center drill in
to steady it and also the center drill part will be the female end of the tap support
I've gone deeper than I would normally do that so if you get a tap like this it
will support the end, use a centre on here a revolving centre and turn the outside down
it's going to give me about 50mm
0.317" this bits not that critical because it's only the
centre piece that I need 8mm The main thing is that goes in this hole.
Which it does I'll leave it at that size what I'll do is come in 25mm and reduce
the diameter down another 2mm
I have a problem there that the revolving centre is too big and the lathe
tool hits the center so I can't go down any further.
so what I'm going to do is
make a temporary centre to get over the problem.
I've held a a piece of steel in the ER20 collet
on my grinding fixture and now I'm going to grind a centre
using the grinding fixture
I've just machine the other end
and on this end I want to form a 30 degree chamfer to former point
now if you're wondering where you can get a spring for this project try
looking at your soap dispenser because they have different sized springs inside
I want a flat end on the spring on this spring it's got a smaller coil wrapped around
I'm just grinding off the first coil
this is my die guide that goes in the tailstock, morse taper on this end
a parallel piece on that end and what we did was drill a hole and bore a hole out
in the end of the die guide then we made this bush which has a 6mm hole
straight through then we opened it up into an 8mm hole and the last
bit was a 10mm hole so there are three different bore sizes in there
slide fits into the end of the die guide this spring I've just ground the ends of
the spring so it's flat and taken off the last coil which was wound around inside.
The spring will fit into the 8mm bore we've made this
which is an 8mm rod in the middle with a six millimeter diameter at each end
a point on that end and on this end centre drill hole
So this can go either way into the device What we will do is we put this in that way
you can see with the spring in there this slides over the spring and then
this is spring-loaded and moves up and down
then the cap that we made goes over
the end fits in there so all we need to do to this is drill a hole through the
side tap it and put a screw in just to stop the cap coming out and that's
finished then that will slide into this we don't need to put anything to hold it
or to stop it twisting because when this comes up to the back of a tap that
will fit in the hole and puts some spring pressure on
Thats the die holder guide bar which we drilled and bored out on the end
that goes into tailstock normally if i'm using a die I'll put the die in the holder
that goes on here and it will slide in and out and also to thread along a piece of
bar the hole in the end lets the bar go through into the die holder so you can
thread up to two inches so now you want to do a tapped hole select your tap on
this tab it's got the center in the end so you take the adaptor we've just made
I will put a grub screw in here but I've got these cap head for now it's
already got the wrong centre in there that's for a a male so you take the
cover off the end turn it round to the pointed part put the cover back on
tighten that by hand it doesn't need any force rate it's just to stop the spring
coming out and the parts coming out return this into your holder put the tap
in the hole bring the holder in the end and you'll see here
that's a turning in the plunger goes into the bar and then that's spring
loaded so as I tap the thread and the thread goes in the plunger will come out
and you can always wind this in a bit further if you need more tension and if
you have taps that have got the male end you just swap the plunge around and use
the cone here are some details of the parts used
oh well that's it for today I hope that information is useful to you and we'll
see you next time on Enots engineering