I think this fella needs a Metrology setup lesson

[KeeponDragon]

How Not To Check Runout

 

[DPittman]

Possibly wrong link?

 

[KeeponDragon]

what the hey...lol...yeah definitely not the right link...darn it...
this is what happens when you're trying something from your phone lol

try this one

 

[Susquatch]

This is pretty classic. But the truth is that I see guys screw up like that all the time.

The reference (the magnet end) is just as important as the needle end.

 

[Dan Dubeau]

Pretty funny. No doubt on purpose for the likes and views, but for a fun trick, do that on a lathe horizontally.........

 

[DumbStudent]

Can someone explain what he's trying to do there? Is it making sure it's concentric or something?

 

[Susquatch]

Can someone explain what he's trying to do there? Is it making sure it's concentric or something?

I think the intention was to make sure the part was concentrically aligned. But as @KeeponDragon noticed. It is a redundant setup that produces meaningless results. About all that could be measured with that setup is the minimal distortion in the chuck itself as it rotated, and you would need a much more accurate indicator than that to measure that.

In other words, it's either a newbie screwup or as @Dan Dubeau suggests, perhaps just a deliberate attempt to get views from folks like us making fun of him.

 

[Engmaxx]

Oh wow. And he didn't think that the needle not moving at all during the rotation meant something wrong? Same person who puts a fan on a sailboat to blow the sail and wonders why it won't move.

 

[FatherWes]

Reminds me of when I was at Uni. Walked through a lab and saw a PhD candidate (Mech Eng) sitting and turning a bolt trying to tighten a connection. Quarter turn at a time with 1” open end wrench.
15 minutes later I walked past again and he was still turning the bolt.
I felt sorry for him and leaned in to say:
“You’ve got to hold the nut….”
I suspect his speciality might have been thermodynamics….

 

[Tom Kitta]

I think it was done as a joke.