Mike:

We've found this C word to be confusing, so we reserve it for a "full
clinch", which we define as any bend more than 75 degrees from vertical.
Any less of a bend, or "partial clinch", we call a "flare".  We flare almost
all of our DIP's leads, because they're machine inserted.  If the parts are
inserted manually, the spec allows you to flare the corner leads, which is
useful for part retention.

Recognize that 40.1.2 is titled "Partial clinch of DIP leads.", so it
doesn't contradict 40.1.1.

And I don't think that 40.1 means that leads have to be clinched; 40.1.3
covers "Straight-through lead terminations."

-Joe

> ----------
> From:         Mike Sewell[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;[log in to unmask]
> Sent:         Thursday, June 01, 2000 10:41 AM
> To:   [log in to unmask]
> Subject:      [TN] MIL-2000A DIP lead clinch requirement?
>
> Morning all,
>
> Interpretation of 2000A requirements for DIP lead clinching after
> installation...
>
> 40.1.1 restricts fully clinched leads for DIP and full or partial for
> tempered pins or leads over 1.3mm dia.
>
> 40.1.2 states bends shall be outward.  If manual clinching is used, only
> corner leads of DIPs may be clinched.
>
> 40.1.3 component leads terminated straight through shall be discernable
> and
> may extend a maximun of 1.5mm above the termination area.
>
> Does this read as 1) if you're going to clinch a DIP - don't fully clinch.
> 2)
> if you're going to clinch a DIP - partial clinch outward, and only the
> corner
> leads if done manually 3) If you're not going to partial clinch - then
> just
> meet the lead protrusion requirement?
>
> In general, does 4.1 Lead Terminations. The length of the clinched portion
> of
> wires and component leads .... imply that leads shall be clinched?
>
> Thanks in advance,
> Mike Sewell
>
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