Chuck Run Out - What Caused It?

[prasad]

Guys,

It got resolved. I found a couple of aluminum chips caught in the spindle threads. I cleaned the threads on both spindle and the chuck, remounted the chuck and dialed it. No more run-out. Thank you everyone for pointing me in that direction. Your guidance is highly appreciated.

Thanks
Prasad
Wynnewood PA

 

[joshua43214]

Guys,

It got resolved. I found a couple of aluminum chips caught in the spindle threads. I cleaned the threads on both spindle and the chuck, remounted the chuck and dialed it. No more run-out. Thank you everyone for pointing me in that direction. Your guidance is highly appreciated.

Thanks
Prasad
Wynnewood PA

A valuable lesson.
I always wipe both the chuck and the spindle, then blow it off with compressed air (you can use the cans for dusting computers for this), and finally I run my fingers over all surfaces to ensure they are clean.
It can be difficult to keep stuff clean, especially with aluminum. It has a tendency to get into hard to reach spots and get over looked or jump off a rag onto the surface you just "cleaned."

 

[kingmt01]

It has a tendency to get into hard to reach spots and get over looked or jump off a rag onto the surface you just "cleaned."

Plastic is even worse. I hate doing plastic. It is almost worse then cast iron.