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Hi guys. I would think the edge finish would depend at least partly on what
type of seal you are using. If it's an O ring, the groove has to be pretty
smooth, but maybe not the whole edge. A rubber O ring can't depress into small
cuts or grooves running across the O ring, but can seal fairly well if the cuts
are in-line with the O ring. If the disk has a tapered edge, that will squeeze
tighter as the pressure is applied. Look in Stachiaws (sp?) book and see how
much pressure was applied to some of those disks.
On the other hand, if you are using a liquid polymer to seal the disk to
the housing, the smoother the better. A polyurethane type sealant works best on
a smooth surface, like glass. If it's a rubber gasket you choose, smooth is not
that important because there's no contact on the disk edge, only on the
face.
I'll be using the polyurethane. Frank D. Create a Home Theater Like the Pros. Watch the video on AOL Home. |