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October 2000

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From:
"Hamilton, Richard CLE 4454" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 30 Oct 2000 11:02:10 -0700
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Jack,

We have been using the following dimension and tolerance for tooling holes
for quite a few years now: .125" +.002 / -.000. It has served us well and we
have not had any issues with the tooling holes from various board vendors we
have used over the years.

And, from the 'for what it is worth' department, I am in production. The
driving force for this specification is our automatic equipment we use on
the floor. The only issue we have had to deal with is the location of holes
located off the tooling holes. As long as the other holes are within what we
call for, everything is fine. Since we use the tooling holes as a reference,
we believe they need to be held tight, otherwise you have tolerance build-up
and then life really gets fun!

Good luck, hope this helps.

Richard Hamilton
Clemar Mfg. / Rain Bird
[log in to unmask]

> -----Original Message-----
> From: Olson, Jack [SMTP:[log in to unmask]]
> Sent: Monday, October 30, 2000 9:27 AM
> To:   [log in to unmask]
> Subject:      Re: [TN] Re-inventing the Wheel
>
> Well, the real reason I am asking the question about tolerance,
> is that it was suggested to me that we use .120 +.002-.000 for
> tooling holes to fit a 3mm pin.
>
> I just wondered if a 2mil tolerance was really necessary, since
> I have been using +.005/-.000 for about 15 years now...
>
> Jack
> (assembly people might not know, maybe I should have
> asked fab vendors what they typically see on the prints)
>
>  -----Original Message-----
> From:   Stephen R. Gregory [mailto:[log in to unmask]]
> Sent:   Thursday, October 26, 2000 11:38 AM
> Subject:        Re: Re-inventing the Wheel
>
> In a message dated 10/26/00 1:16:05 PM EST, [log in to unmask] writes:
>
> Hi Jack!
>
> If you have .125" holes in all your boards, I think it would be easier to
> get
> some tooling pins that match your boards rather than have to go and change
> all your board designs. Fuji tooling pins are changable, it's just a
> matter
> of loosening a set-screw and putting a new pin in...any competent machine
> shop should be able to make them for you.
>
> Just a suggestion...
>
> -Steve Gregory-
>
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