Some time ago I did something like this. I was not able to
pick up the object but I could "walk" it up the wall with a
magnetic retrieval rod. The rod kept sticking to the wall
anyway so I just gave it a try and it worked.

Allen

-----Original Message-----
From: piclist-bounces@mit.edu
[mailto:piclist-bounces@mit.edu] On Behalf Of Jason White
Sent: Saturday, July 14, 2018 5:32 PM
To: Microcontroller discussion list - Public.
Subject: [EE] Removal of steel ball bearing in iron casting
using magnets?

Hello All,

A 1/8" steel ball bearing has fallen to the bottom of a 2.5"
deep 5/64"
hole in a large iron casting.

It is feasible to use magnetics to remove the bearing?

I suspect not but perhaps it is a failure of my imagination.


The hole is the oil passage to the spindle bearing of a
small lathe. The
ball is blocking oil from entering the spindle bearing and
must be removed.

The ball bearing is loose in the passage. If I could flip
the lathe upside
down it would probably fall out of the hole.

Currently it seems I will have to tear the lathe apart to
get the ball out.

Thanks,
Jason White
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