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Type: Posts; User: BoxcarPete

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  1. Replies
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    How 'bout this one for you guys, a UHMW paint...

    How 'bout this one for you guys, a UHMW paint canister piston. Absolutely nothing wrong with any of it, I was just installing energizers and thought to myself,

    "Pete, these energizers are a pain...
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    1.4-1.5x the seal cross-section.

    1.4-1.5x the seal cross-section.
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    Makes sense to me. Only minor correction I have...

    Makes sense to me. Only minor correction I have is that AS568 is the spec, and was not written by Parker (ISO-3601 is a metric translation of AS568 for size and contains additional surface finish and...
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    Is that a reciprocating or a rotating seal? For...

    Is that a reciprocating or a rotating seal? For reciprocating it doesn't much matter, the downside to grooving the shaft is that it becomes a "piston" and needs to ride in a bore at least as long as...
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    Fair enough, -024 has ID of 1.114" so with a...

    Fair enough, -024 has ID of 1.114" so with a shaft of 1.125" it would work in a bore-grooved design but -025 would be better, and a deeper groove with a -219 would be better yet! And as I mentioned...
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    Ha, just noticed that we have some...

    Ha, just noticed that we have some stainless-on-stainless action here.

    Parker book says not to, but in a case like this you might be able to get away with using the o-rings as guides to keep the...
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    https://www.parker.com/Literature/O-Ring%20Divisio...

    https://www.parker.com/Literature/O-Ring%20Division%20Literature/ORD%205700.pdf

    Start with chapter 5, section 27 (page 123) or section 28 (page 125).
  8. Safety glasses anywhere in the shop anytime...

    Safety glasses anywhere in the shop anytime anything is spinning. Had it drilled into me by the shop manager at the university who had a zero-tolerance policy on safety specs. First offense, out of...
  9. Just out of curiosity, if the mold is deformed...

    Just out of curiosity, if the mold is deformed badly enough to trap the set screw, how are you validating that it will still make accurate parts?

    Sounds like if you could hollow it out enough, you...
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    Error comes in the third decimal place if you can...

    Error comes in the third decimal place if you can manage 9.5mm pitch, might be good enough for a cap if the threads don't need to seal.
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    That's not quite true. A basic dimension denotes...

    That's not quite true. A basic dimension denotes the nominal size, but the tolerance for that dimension is carried elsewhere in a geometric control box rather than on the dimension itself. A...
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    If the drawings are made properly, those terms...

    If the drawings are made properly, those terms should mean this:

    Nominal: the theoretically perfect geometry.

    Reference: a dimension without a tolerance. It is listed to give information (e.g....
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    My opinion of what it means is summed up nicely...

    My opinion of what it means is summed up nicely by the quote posted on my late grandfather's office door:

    "The market can remain irrational longer than you can remain solvent."
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    Console... What's a console? Honestly I'm...

    Console... What's a console?

    Honestly I'm surprised a place like GameStop can still exist at all. Even if you still had a console you could digitally download games directly to it or type into the...
  15. Glass filled PTFE will indeed eat bare aluminum...

    Glass filled PTFE will indeed eat bare aluminum for breakfast, but you said it appeared to be coated. I would look at moly or bronze-moly (molybdenum disulfide, MoS2) as your filler. You say it's...
  16. That's no excuse. In my opinion: if someone...

    That's no excuse. In my opinion: if someone writing a technical report can't be bothered to spell words correctly then they can't be bothered to include accurate information. Same goes for...
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    Need a tight slip fit on both? + reamer. Need...

    Need a tight slip fit on both? + reamer.

    Need a light friction fit on one and slip on the other? + reamer and - reamer.

    For that size, you'd want to be removing 0.1~0.2mm (0.004~.008) with the...
  18. The one thing I can say with certainty is that...

    The one thing I can say with certainty is that the nozzle holes are made by EDM after heat treat. I used to work at the place that made the machines.
  19. After a quick google translate, written Kanji are...

    After a quick google translate, written Kanji are the same, but we still don't know if the pronunciations are the same since the only kana google gives are the oh-so-helpful direct transliteration of...
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    Sure, plenty of institutional traders are holding...

    Sure, plenty of institutional traders are holding GME, AMC, etc. long and making money for it. That's not the focus. The focus is:

    Can institutional investors who over-extend be made to bleed?
    ...
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    I'm sure that there are those who did wiggle out...

    I'm sure that there are those who did wiggle out of it relatively unscathed. It's still very much up in the air, but when the shoe drops I predict that it'll come down in one of two places:

    1. Fat...
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    I don't know if you understand the resolve of...

    I don't know if you understand the resolve of these WSB redditors. I'm not participating but I know some who are. This is like Occupy Wall Street, except instead of pitching tents and impotently...
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    Just another point of evidence that the fat cats...

    Just another point of evidence that the fat cats leverage their resources to multiply their own wealth at the cost of us peons, without allowing losses due to the risks that the rest of us are forced...
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    Or you could just put 17, 18, 19, and 20 right...

    Or you could just put 17, 18, 19, and 20 right next to each other and let 'er rip!
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    12-pack on the way, thanks for the heads-up!

    12-pack on the way, thanks for the heads-up!
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