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Type: Posts; User: Conrad Hoffman

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  1. Replies
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    3,515

    My knees are shot and I'd be filing some kind of...

    My knees are shot and I'd be filing some kind of disability action.
  2. "And yet it moves." Galileo Galilei

    "And yet it moves."
    Galileo Galilei
  3. IMHO, just looking at the part, it's an...

    IMHO, just looking at the part, it's an unreasonable tolerance. Customer needs to understand what's reasonable and come up with a better way if they really need that slot so close.
  4. It's a jacot pivot lathe. Google it!

    It's a jacot pivot lathe. Google it!
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    Hey, are you guys hiring writers or machinists?...

    Hey, are you guys hiring writers or machinists? He might well have natural ability and be pretty good as a machinist, not a writer. IMO, it's like real estate- location, location, location. Some...
  6. That reminds me about lighting. You need good...

    That reminds me about lighting. You need good light to see what you're doing, plus a light or white surface behind to see the gap between the wheel and work.

    I think I've heard of people running a...
  7. If the wheel isn't perfectly balanced, a...

    If the wheel isn't perfectly balanced, a non-rotating and rotating wheel are not equal in terms of contact. I think dress is also important. The wheel loses some high spots on the first couple...
  8. I sing the praises of change-gear lathes for...

    I sing the praises of change-gear lathes for anybody doing weird and technical stuff. As I get older, I curse small dials.
  9. I grind a sacrificial piece and measure it. A VFD...

    I grind a sacrificial piece and measure it. A VFD is also useful as I find you can start and stop the wheel with little problem because of the ramp up/down. If I'm doing anything fussy I might run...
  10. Aquabond Technologies > Home...

    Aquabond Technologies > Home
  11. You can tune up brazed tooling on a diamond...

    You can tune up brazed tooling on a diamond grinder until the cows come home and it still won't be as good as a properly chosen insert. At least it will have the benefit of costing more than the...
  12. Wow, too bad the Star Trek transporter hasn't...

    Wow, too bad the Star Trek transporter hasn't been invented yet, or it would be in my garage in a blink.
  13. The narrow inserts can have a small radius. Make...

    The narrow inserts can have a small radius. Make sure you have an insert that doesn't need an excessively fine feed and isn't overly delicate. If it's a one-off, this is where a properly ground HSS...
  14. From the other side, we're a small company doing...

    From the other side, we're a small company doing a lot of R&D projects. We'll commonly do RFQs with two or three shops. It would be very unusual to do five. We don't care what the shop rate is, only...
  15. When I need something portable/pocket-able I grab...

    When I need something portable/pocket-able I grab a 1" round bubble level.
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    I recently saw an article about counterfeit books...

    I recently saw an article about counterfeit books produced overseas. Missing sections and odd rewrites were the hallmark of such.
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    The last thing in the world I want is equipment...

    The last thing in the world I want is equipment that somebody "cleaned up." As said above, the good stuff is dirty and untouched. Most of the time, anyway.
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    I need to get a life. I read it the same way and...

    I need to get a life. I read it the same way and thought, "why not use a Noga like everybody else?"
  19. Good catch on the bolts. Some time back there was...

    Good catch on the bolts. Some time back there was a thread about lockwashers. Turns out they don't work and Loctite is probably the best bet.
  20. Both aluminum and stainless steel hex spacers are...

    Both aluminum and stainless steel hex spacers are common, assuming they don't short to the traces or violate clearance rules for CE and the like.
  21. The photo looks a lot like old musket balls or...

    The photo looks a lot like old musket balls or maybe copper. Hit one with a hammer. Is it soft?
  22. Replies
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    IMO, at 50-100 pieces no normal person will be...

    IMO, at 50-100 pieces no normal person will be able to afford this. Machined parts in this country are expensive. You should make up detailed drawings, with tolerances, and do an RFQ here to get some...
  23. I believe methanol is the best alcohol for...

    I believe methanol is the best alcohol for removing fingerprints. IMO, alcohol in general isn't very good for oils and greases. One of the more annoying things I clean is the gunky film that comes...
  24. I used to clean very soft scientific coatings on...

    I used to clean very soft scientific coatings on interferometers and the first rule was not to clean unless absolutely positively necessary. We used a technique called drag wiping. This only works on...
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    Visual CADD is a great program that grew out of...

    Visual CADD is a great program that grew out of the old Generic CADD. If one took advantage of a trade-in deal or otherwise got in early, it's a bargain, but IMO it's too expensive for the hobbyist...
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