The Museum of HP Calculators

HP Forum Archive 14

[ Return to Index | Top of Index ]

Grease in on/off switch HP45
Message #1 Posted by Ronald on 11 July 2004, 7:08 a.m.

Hi,

Wat kind of grease can you use for the on/off switch in the classic calculators serie? I have a heavy greasy for ball bearing with teflon in it, so it is viscous enough not to flow away and is real lubricating, but .......??

Any suggestion, comments ?

Thank you.

      
Re: Grease in on/off switch HP45
Message #2 Posted by Etienne VICTORIA on 11 July 2004, 2:55 p.m.,
in response to message #1 by Ronald

Hi,

I've put Silicone : HALF A TENTH OF A DROPLET in my 35, 67,22,21 & 25 with success.

However, I would advise NOT to inject it with the usual spray as it would be to much a quantity.

I dismounted the calculator and added silicone just on the on/off or pgm/run switches.

Hope it helps.

Etienne

      
Re: Grease in on/off switch HP45
Message #3 Posted by David Smith on 11 July 2004, 3:16 p.m.,
in response to message #1 by Ronald

I have used Permatex Superlube teflon based grease, Radio Shack Lube Gel, or Dow 111 vacuum grease.

      
Re: Grease in on/off switch HP45
Message #4 Posted by Katie on 11 July 2004, 11:41 p.m.,
in response to message #1 by Ronald

I use this stuff:

http://www.hmcelectronics.com/cgi-bin/scripts/product/3480-0019

            
Re: Grease in on/off switch HP45
Message #5 Posted by Ronald on 12 July 2004, 3:24 a.m.,
in response to message #4 by Katie

Thank you, I just ordered the grease.

I am a bit afraid if the grease I use today is to acid and will, in time, eat away the copper contacts itself.

                  
Re: Grease in on/off switch HP45
Message #6 Posted by Katie on 12 July 2004, 10:14 p.m.,
in response to message #5 by Ronald

I've been using it for about 5 years on many calculators with no damage to the contacts. I wouldn't (and don't) worry about it eating away the copper.

      
Radio Shack Lube Gel (p/n 64-2326)
Message #7 Posted by Karl Schneider on 12 July 2004, 1:12 a.m.,
in response to message #1 by Ronald

Radio Shack Lube Gel (p/n 64-2326)

Others have recommended this lubricant, which I plan to use on the slide switches on my 34C's.

[ Return to Index | Top of Index ]

Go back to the main exhibit hall