hello welcome to Enots engineering i'm Alan in today's video we'll be making
four millimeter spacer for the bearing base and also a tool block which is a
length of silver steel with a triangle milled into the end to accept a tungsten
carbide tip so let's go to the workshop. Set a piece of half-inch silver steel in
the chunk and were making a tool post to hold a tungsten carbide tip
I've set up my Rotozip in the tool holder using a jig I made out of
aluminium and it's got a three millimetre carbide cutter in the collet.
the tool height is adjusted by using the height adjustment on the quick-release tool
post
I've locked the saddle and I'm feeding the cutter in using the compound slide
Now I need to turn the Chuck so I get the triangle formed in the end of the
tool post on making. To do this I can just turn the truck around I've put in
back gear so the cutter won't move the Chuck and I'll just level the jaw up
using a spirit level
I've set my compound slide to zero so I can come back to that reference point
As you can see the carbide tip fits neatly into the end of the bar and now I
just need to make a new screw to hold it in position this is a 5mm cap head with
the thread removed and rethreaded 3mm and then a small diameter to suit the
tip size and tightens it to the end of the bar
I'm just setting my parting off tool and I'm using the face that I've just faced
off as a guide to where the tool is square
I'll part the spacer off at four millimeters wide
I've just clocked in the face up within a couple of thou.
4.76 I want it 4
keep an eye on the corner the tool post t here and the top of the tool
post to make sure that they're not going to hit you Chuck jaws now the
width of the spacer is four millimeters just take off the sharp edges this is a
block with the bearing in and the pin we made the spacer goes into that hole and
depending on the thickness of that spacer gives you the clearance between
the bottom block and this block assemble the pin through the bottom
plate there's the dovetail part on the bottom
it's resting on there now you can see that goes around without fouling the plate .
oh well that's it for today I hope you enjoyed it and I hope to see you
next time we're not be sorting out some problems
with my 4 jaw chuck