As an alternative to a swinging ball, consider making no changes to the ball
and dropping it vertically using a tube. The ball can be held in place in
the tube using a bolt (or a similar object) as a stop. Pull the bolt and the
ball drops from the exact height required by the standard. The test is very
repeatable as long as the tube is vertical and the diameter is slightly
larger than the ball.
Richard Woods
----------
From: John Allen [SMTP:john.al...@rdel.co.uk]
Sent: Tuesday, March 21, 2000 9:50 AM
To: Jasmine TAN; emc-p...@ieee.org; 'Jim Bacher'
Subject: RE: Steel Ball For Impact Test
This item can be obtained from a number of US sources - such as ED&D
- but
cheap they are not as we just found out when we boought one!!
A cheaper source is probably your local heavy industrial equipment
service
organisation - a 2 inch diameter ball bearing is more or less what
you
need.
As for tolerances: if it is a little light or heavy then I am sure
a
compentent workshop can fix that with a welding torch or a grinder -
especially if you get a loop for the cord added at the same time!
Regards
John Allen
Racal Defence Electronics Ltd.
----------
From: Jim Bacher[SMTP:jim_bac...@mail.monarch.com]
Sent: 21 March 2000 12:29
To: Jasmine TAN; emc-p...@ieee.org
Subject: Re:Steel Ball For Impact Test
forwarded for Jasmine TAN. Jim
____________________Reply Separator____________________
Subject: Steel Ball For Impact Test
Author: "Jasmine TAN" <sb...@ctl.creative.com>
Date: 3/21/00 6:53 PM
Hi,
Does anyone has any recommended source on "Steel ball" for Impact
testing
as listed in UL60950.
Thanks for your recommendation.
Regards,
Jas
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