Jasmine- You can order a stainless steel 2" ball online from McMaster-Carr for $28. I did, and received it the next day via standard UPS! (Those test equipment labs want $95-$150 for the same ball with a loop soldered on.)
www.mcmaster.com catalog page# 3184 (steel balls) Stainless Steel (C440) P/N 9529K53 , 2" dia. This ball weighs 520g, which is within the 60950 spec of 500g +- 25g. I had a buddy at a machine shop drill a hole through the middle so I could run a cord through it for pendulum use, too. (Drilling out the hole brought the weight down to almost 500g.) Any weight discrenpancy can be dealt with by adjusting the drop height, of course. Have fun making an impact for your company! Dirk > -------- Original Message -------- > Subject: RE: Steel Ball For Impact Test > Date: Tue, 21 Mar 2000 14:49:31 -0000 > From: John Allen <john.al...@rdel.co.uk> > Reply-To: John Allen <john.al...@rdel.co.uk> > To: Jasmine TAN > <sb...@ctl.creative.com>,"emc-p...@ieee.org"<emc-p...@ieee.org>,"'Jim > Bacher'" <jim_bac...@mail.monarch.com> > > > 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 > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson: pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
