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so today i want to dive into how to use a dial indicator this particular one happens to be
a dial indicator with a clamp on it and i have it hooked up just on a jack stand
and i'm about to test the run out of my amco brake lady machine i'm fortunate enough to have one
and it's a little used and abused i'm going around starting to replace parts on it so i figure why
not check the arbor run out and this tool is good basically for anything that you need to check
surface conditions of whether it be a rotor the arbor like this
you can check heights of things like pistons and valve clearance so it's a very good tool to have
so i'm going to zoom in on it and let's get over here and see i should focus in
there we go i'm gonna get a little closer probably make it a little easier to read
all right as you can see there's a slight preload on it so you always want to pre-load these things
and the little needle is sitting down on the brake lathe arbor and i'm checking the
total run out on it to make sure that it's not going to put any vibration or surface
irregularities in the item that i'm actually on the machine on it whether it be a drum or
road or flywheel whatever it gets on there so i'm going to zoom in so we can check this all right
and you can see it's kind of
rocking back and forth almost and that's due to temperature and different variations of things and
um a number of things can cause that
that's a little better picture there let me zero this out or get it as close to zero as i can
alright that's about on zero there
there we go so i'm gonna turn the machine on and we're gonna let it stabilize and check out now
like i said this machine is used and old a lot of things on on the cabinet shouldn't be
on there so it's going to be some vibrations in it but we'll check the overall run out and see
exactly how true this thing is the machine is probably 20 years old easy
okay so we have it on and it's kind of stabilized so
i'll bring it over to the zero so it's a little easier to read
and there it is and you can see it's bouncing off the zero and it's about a thousandth runoff
maybe a little less than a thousand so that's actually uh pretty good you know a thousandth is
quite small so we'll stop it and you see it goes right back on the zero we'll start it back up
and again the deflection is minimal i'm talking less than a thousandth of an inch
so that's actually very good again we'll shut it down again
let it settle see if i can get a better view i want that recording good
so the main thing with setting up one of these is you want to get it on a fixed spot
not on the object that you're actually measuring because especially something like a brake leave
that's going to vibrate so i just have that off on a jack stand and you really want everything super
tight all the clamps and the holding fixtures for the um dial indicator all that has to be super
tight and you want to put a slight preload on it if you see i'll lift this up it actually rests
somewhere around seventy two thousands normally sitting so you wanna put a little preload on it
and we preloaded it get it back to zero
again
and as you can see it'll go back and kind of find its way back again i disturbed it
but it's still balancing within less than a thousand of an inch so it's in good shape
basically that's the way you check run out on things you just want to put a little load on it
and see exactly how that surface is doing and the surface that you're actually going to be testing
you want it free and smooth if any rust oils solvent you know whatever take some brake clean
wipe it off um what i like to do i like to wipe it off with some brake clean if there's any rust
i'll hit it with some wd-40 if wd-40 doesn't get it off then i'll take some fine emery cloth or
3000 grit and i'll just buff it off and check the surface you can also use this to check the
rotor run out like i said flywheel run out piss in the deck clearance whole bunch of stuff so
tune into my other videos and you'll see this tool getting used thanks for watching please subscribe