How to measure drill chuck runout?

[epanzella]

Desktop printers have a ground rod that's round and straight. If you see one at the dump grab it and take the rod out. I keep one on the shelf. It comes in handy.

 

[Tozguy]

What should be used?

what about using the shank of a broken end mill ?
these could be readily available to us newbies

 

[.LMS.]

what about using the shank of a broken end mill ?
these could be readily available to us newbies

Haha!

 

[Bob Korves]

The import chuck seller takes a number out of thin air, puts the number on the advertising, sometimes includes a "test document" that has been copied so many times it cannot be read, and sends it to you. He is hoping you will not be willing or able to check it, and even if you do find an error, unlikely to send it back. He wins at that game...

 

[P. Waller]

Are you looking for a method of measuring drill chuck run out or a way to quantify it?