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While through holes eliminate the need for plugging as part
of the chromate/anodize process it does require duburring deep
between the fins. Blind holes on the other hand eliminate the
need for deburring but requires that the holes are plugged
during the chromate/anodize process. These conflicts when
coupled with the very high density of fins of fabricated
heatsinks lead us to make the following recommendations to keep
costs to a minimum:
- Specify
blind holes wherever possible in the mounting surface. It should
be recognized that some streaking may occur at the plugged holes
and as such cosmetic requirements must be specified at time of
RFQ.
- Through
holes in the mounting surface eliminate the need to plug. It should
be noted however, that deburring between the fins may leave minor
scratches near the through holes and as such cosmetic requirements
must be specified at time of RFQ.
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