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replacement for nylon balls in HP97 card reader - Printable Version

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replacement for nylon balls in HP97 card reader - Alberto Fenini - 09-14-2009

Hi everybody, while restoring an HP-97 card reader, I have noticed that only one out of the original four nylon balls was in place. Has anybody found a compatible item for replacing them ? Thanks in advance for help, Alberto


Re: replacement for nylon balls in HP97 card reader - Randy - 09-14-2009

1/8" nylon balls

Shipping will be more than the parts...

Send me an email and I will post a set to you.


Re: replacement for nylon balls in HP97 card reader - Katie Wasserman - 09-14-2009

Randy,

I found these replacement balls some time ago and have been using them ever since, but never found a suitable replacement for the rolling-pin shaped part. Do you have an alternative?

-Katie


Re: replacement for nylon balls in HP97 card reader - Randy - 09-14-2009

Quote:
...Do you have an alternative?...

Unfortunately no. But on the up side, the only bad ones I've ever seen are the ones I lost ;-)


Re: replacement for nylon balls in HP97 card reader - Dan W - 09-14-2009

I agree, get 1/8 inch balls at smallparts.com

I use the Delrin balls myself.

http://www.smallparts.com/Acetal-Delrin-Polished-Grade-Diameter/dp/B0017YT1YY?ie=UTF8&qid=1252979270&pf_rd_r=0XAX5FYGCTKZ6K0F4X54&pf_rd_p=467590051&pf_rd_i=16414311&sr=1-1&pf_rd_s=center-3&pf_rd_m=AIUBT5HP6PMAF&pf_rd_t=101




Re: replacement for nylon balls in HP97 card reader - Klaus - 09-15-2009

I read from someone who used a watchmaker's lathe to build one. It did come out fine, I think he used brass, but "Never again" was written (maybe between the lines) IIRC.


Re: replacement for nylon balls in HP97 card reader - Katie Wasserman - 09-15-2009

I remember something like that too. Since I haven't seen these on ebay, my guess is that it was much too hard to repeat.