are you going, Kurtis from Cut Edge Engineering today's job is
a 789 rear support rod, he comes to take the eye back, so this is from a 789 dump
truck, a rear suspension strut with suspension support for the truck, or a shock absorber
, when things go wrong and they get quite a lot of punishment if not caught in time, it
goes seriously wrong and does a lot of damage as you can see here below, the bearing
broke and after the bearing started to separate and the truck was being used, all the
components were nailed together and actually destroyed the eye and
many bearing materials and other parts and it impregnated the parts in the eye so we'll have to do a bit of
work to grind all that material because it can't
be tightened in order with all the bedding material in there, if I tried to drill this using carbide bits I would
burn the bits like they were outdated, um what a hard material
they just destroy the bits , so the first thing we have to do is get everything
ready I'll go there with a big barrel grinder and
grind most of the bedding material I can avoid destroying inserts and
we'll take a couple of cuts and hopefully we can get everything and then start repairing it in
case we didn't know
it then some handy arrows where there is damage ah
they help yup
this you can understand what the armature is, I bolt this tensioner down
, actually one of the tracks on our Toshiba milling machine,
very handy as it has 16 spindle threads in it, we
can use our clamp down kits to hold large pieces
to try to set this up on a bench in some V block or whatever if it will be too
hard , its size and height, I would
n't trust it standing alone on the ground, so put something heavy under it. compact another pallet from the milling machine, you have a nice barn working platform so what I want to say is, what
everyone always asks is, isn't it cheaper than repairing the old one, isn't it cheaper to buy new, by no means
tens of thousands of these struts to buy new from the manufacturer? it would be dollars, this repair
will take less it's not cheaper to buy a new one someday
, try the material parts bearing all the parts of
the bearings and
get the guys as much as I can, so
we put our WS2 line drilling machine to work now we have the first thing to do, the
rod was to place it in the middle of the hole because you know the hole is pretty damaged there
, you have a few different methods you can use, we use a shop made centering plug so
the outside diameter of this plug is actually the right size that the bearings will be when they are complete
, I had to hit the hole to adjust them so
it's pretty tight there , only the actual area damaged is the eye in its base
this is such a large diameter hole that I have about 8 bananas just over 200
mils, we had to use our Sir Meccanica tool holder extension, it just clamps onto the rod
, the tool can then be adjusted in and out so I'm not going here as there is a lot of bearing
material in my ECGT bits they're expensive to go and use and i'm
running out so we have these bits these are a bit bigger than a CCGT
ah might take a bit more punishment so this is a pretty good bit hole
thing and um try and try and it's that clear and
this horizontal worm or big milling machine say is also not done why you might have a lot of wonders so clean it
um i was looking for good condition horizontal driller for a long time now
i couldn't find one that i think is in good enough condition for me to spend money
on it so it would be an excellent job because i have one no, so we'll just
go with the 'line piercing boys',
so it puts it all back together uz, taking
another incision from the eye, it turns out there was a repair there before, so it
cut the corners it welded over the porosity we found in the snap ring groove, it's
pretty common to find people doing the wrong thing when they can.
For what we are currently doing we tend to be seen after welded, we know many of you know dangerous repairs
, the problem with welding over porosity is not welding on porosity because there
is too much grease left in the porous holes. you can't weld on grease, so
once you start a weld there, it just tends to explode and go on and you just spit [ __ ] all over the place
and you can't weld, so it needs to be blasted, make completely new material So clean it up
put a new layer of weld in there and be done with it, so we're going to
take that a little further and get some more material and then hopefully we
can build a good weld layer no man okay
inside we no what we're going to do we put our second layer of weld so we put the
boring bar back in place
a nice clean one for our 3rd and last layer for the surface we're going to scrape off that second layer, it's
not a good idea to stack multiple layers of weld on top of each other So after every 2 I
'll put the boring stick back in and go over the second one so my third layers
have a nice clean surface to go well with
, There's a big shadow on your face,
I can't help it nah
how are you doing, Kurtis from Cutting Edge Engineering