RE: Ball Bearings

• To: tesla-at-PUPMAN-dot-com
• Subject: RE: Ball Bearings
• From: Dan Kline <ntesla-at-ntesla.csd.sc.edu> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Fri, 18 Jun 1999 12:38:44 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

At 05:54 PM 6/17/99 -0600, you wrote:
>Original Poster: "Don Kemper" <de.kemper-at-worldnet.att-dot-net> 
>
>Hope you all don't mind one more suggestion. Richard Staron has givin good
>advice about reducing hardness and could be used with this method if
>necessary. Several have given good ideas as well. This method may help with
>other problems as well.
>
>Not everyone has a milling machine, but most probably have a decient drill
>press. Buy an end mill as used in a milling machine and chuck it up in the
>drill press. End mills cut on both the sides and the flat "end" surface of
>the mill, they are not pointed on the end like drill bits. Put the ball
>bearing in a vice and carefully center the ball under the mill. (This is
>easier if one has one of those inexpensive cross vices.) Use a slow RPM on
>the drill press and a slow spindle speed rate and it will put a flat bottom
>hole in your bearing. Of course, this will work on other round surfaces as
>well like drilling through or flating/squaring/slotting a side(s) of a round
>shaft.

Be sure to use oil as a coolant while making these cuts. Different
materials use different coolants so check that out too. Seems like a great
way to make Tesla-coil spark and or safety gaps. (ob-mention ;)
Dan

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