Quote:
Originally Posted by Shern
... Think he’s talking about removing one ten thousandths of a mm.
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Sorry, I was thinking like a 'merican. Probably did mean mm. If true, then 1/1000 of a mm is 1 um (micrometer or "micron"), which is slightly more than a wavelength of visible light (400 to 700 nm). That level of material removal is termed "polishing" since the surface can then reflect light without much scattering. I think that polishing is what the OP intended to achieve and don't see how it could make an injector pintle worthless.