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Type: Posts; User: Joe Gwinn

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  1. I think that the only way to tell is to order...

    I think that the only way to tell is to order some samples, where a run machined from the same batch of steel is split into two groups, one Oil quenched, the other MAR quenched, and see how it goes.
  2. Sudden onset of unstable walking coupled with...

    Sudden onset of unstable walking coupled with vision changes? Get thee to a doctor immediately.
  3. That's probably why Prasham is asking the...

    That's probably why Prasham is asking the question here.
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    What do you mean by "strength"? What is the...

    What do you mean by "strength"? What is the proposed application? It matters a lot.
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    Not really. Earth's internal heat budget -...

    Not really.

    Earth's internal heat budget - Wikipedia
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    I'd wonder if it was actually cheaper to turn the...

    I'd wonder if it was actually cheaper to turn the heat off over the weekend.
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    Try "5f5" paint stripper. It still has methylene...

    Try "5f5" paint stripper. It still has methylene chloride:

    https://savogran.com/pdfs/5F5_MS.pdf
  8. Insulation is very likely glyptal, which is...

    Insulation is very likely glyptal, which is pretty robust stuff.
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    Hmm. Good point. Is the customer planning to...

    Hmm. Good point. Is the customer planning to conformal coat or paint after machining?
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    I'm betting that the customer's reason is that...

    I'm betting that the customer's reason is that many kinds of plastic are chemically vulnerable to oily substances, and will crack or craze after a short time in service. This is why I was suggesting...
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    Is there any reason one cannot use a water based...

    Is there any reason one cannot use a water based coolant that has no oil in it? This will control the dust and probably make the cutters last longer. What comes to mind is pure water with some...
  12. I have a Millrite model MVI with the 1100-rpm...

    I have a Millrite model MVI with the 1100-rpm pancake motor. It fits comfortably under a 79.5 inch high ceiling. I do have to rotate the head to horizontal to remove the draw bar, but there is...
  13. There are many sellers. Here is one. They...

    There are many sellers. Here is one. They should be able to provide a manual.

    Birmingham 16" x 60" High Speed Precision Gap Bed Lathes - YCL-1660 - Penn Tool Co., Inc

    By the way, lathes are...
  14. Can you sell building complete with machines and...

    Can you sell building complete with machines and tooling as a complete machine shop for sale, ready to go?
  15. So fine that I don't see any effect on cookware...

    So fine that I don't see any effect on cookware and dishes, et al, even after years of use.
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    Dust in the lungs is almost generally a bad idea....

    Dust in the lungs is almost generally a bad idea. Even if the material is benign.

    Aluminum is not a problem. Earth's crust (all those rocks) is 8% by weight aluminum. If aluminum was a problem,...
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    Yes, there will be a fan.

    Yes, there will be a fan.
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    I followed my own advice, and bought an 8150...

    I followed my own advice, and bought an 8150 cutting plier. It's similar to the 8160 I bought in the 1970s, but the next smaller size, which is useful to have. Cost about $25. Micro-Bevel 112.5...
  19. Scothbrite pads are color-coded. The white...

    Scothbrite pads are color-coded. The white scotchbrite pads do not have any abrasive.

    I mostly use the white pads for hand washing of dishes: Use Bluette cotton-lined gloves, so you can work...
  20. Yes, that's implied by "blacksmith", but probably...

    Yes, that's implied by "blacksmith", but probably best to be explicit.
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    That sounds right. I looked up the kitchen...

    That sounds right.

    I looked up the kitchen undercabinet lights. They are 3000K with a CRI of 85%.

    These were bought in 2013, and I don't think they are made any more: Philips "eW Profile...
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    The Color Rendering Index (CRI) is basically how...

    The Color Rendering Index (CRI) is basically how close the color spectrum of the light is to that of an incandescent light at the same stated color temperature. A 100% CRI means that the spectrum is...
  23. Depending on what is being displayed, that can be...

    Depending on what is being displayed, that can be safety-critical for sure. Or merely mission-critical.

    This enclosure will get the full treatment and review.
  24. See next posting (#122). I'd think that those...

    See next posting (#122). I'd think that those advertisers would very much want to reach your students - absolutely a key audience for their products.
  25. Yes, but what is the specific kind of...

    Yes, but what is the specific kind of application. It matters - some things are more critical, or requires special attention.
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