Hello welcome to Enot's engineering I'm Alan in today's video we make this
spherical attachments an 8mm thread on this end
17mm spherical and a flange in the middle
and these bolts onto this plastic sheet
that's just bent at 90 degrees this fits on the end of this plastic to hold my sat-nav
this is the bracket for the sat-nav
normally these would have a rubber sucker which fits up against the windscreen on the vehicle
but my windscreen is quite distance from the drivers position
so it's awkward to get to if you want to switch it off switch it on or change anything
if I use these plastic bracket in a tray on the dashboard
the sat-nav clips on this I can alter the sat-nav easily and I can switch it on and off
from the drivers position and being closer to the driver
as well you can see the directions easy
so let's go to the workshop see how we make it
and the first job is to turn this down to 8mm
I want to make an M8 thread on this end
that's 8.01mm okay so this is for an eight mill thread
I've taken it down to 7.85mm which is 0.005-6" under eight mill
so that I don't cut the full form and it's 15 mill along
so what I want to do is come in now and try and get an undercut
so I've left this last bit full-size
and this will go in and then come to a sphere on the end
I'll leave it at 18mm
10.07 so that will do
and before I chop that off completely I should put the thread on the end
I've put a wooden board on here to stop the bed getting damaged just in case I drop it
first of all I'll clean the taper
Now this is a standard ER 20 collet holder with the Morse taper on which matches the headstock
so that goes in then to hold that in position of made a drawbar
which has a thread each end this thread will fit the back of the collet holder this
thread is for the nut on the other end and that bush goes on
and that diameter there is a diameter of the head stock so it centralises it
and when I tighten the nut up on this end it draws in the collet holder
I will just tighten the nut up on the back It dos't need to be too tight you can see it's just drawing that in
Just nip it up so that's fitted
an 8mill Collet so that should hold that The collet goes in at an angle
lines up and that holds it
with the spanner just nip up the collet
so what what to do now on this end is form a spherical
That matches this is which fits into the bracket on the back of the sat nav
this is 17 mill diameter so to do that I need my radius attachment
just have a quick clean down you may have noticed at the bottom here
I keep a foil tray so I can just brush the swarf into the tray and then empty the tray when I need to
for the radius attachments I can remove my compound slide
and the radius attachment swivels this dovetail on the bottom fits in there
I usually set this about 45 degrees I can lock up the radius attachment
this attachment there a video on the channel that shows this being made
the hole in the middle here is on the centre so when you put the tool in if you want to form a ball
you come from the center outwards if you want to do a a dish or it concave you
go from the center inwards and distance you set it from the center to the tip of
the tool should give you the correct diameter
so in the center I can locate this peg this is 12 millimeter diameter on the end
the peg through the center when this tip touches that centerpiece
I know it's six millimeters from the middle
I wanted a 17 millimeter ball to get a 17mm I want an 8.5 radius
so that means I need a 2.5mm gap
between the tip and the setting piece
0.098" this is a point 0.100" block so if I just push that there and lock the block
now I've set that tool to the correct radius for a 17 mil spherical
so all I need to do is go up to the part start to machine the spherical
and as I'm turning in the tools going in and when I get to 17 diameter I know I've got the spherical
The handle goes on the back here it's just a piece of rod
just so you can lever the mechanism round
Now I will position his
here and what I want to do is just form a spherical on this end and then I'll
decide where the centre line is or can then move you down until I get to the position I need
that's the finish item take this off
you can see it clips in there okay moves round
and here's the finished part
the spherical bolted onto the plastic bracket
that's the finished item this plastic piece just drops into a tray on my dashboard
so I don't need to stick this on to the window
and it's easier to get at if you need to change anything
or switch it off swivel there
this Sat Nav has a dash cam on there so when this is set in the holder the dash cam
will see forward you can line that up with the front of the car
so don't need any rubber suckers to stick on the window
and try to get them off again
well that's it for today hope you enjoyed it and we'll see you next time
on Enots engineering