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Type: Posts; User: Conrad Hoffman

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  1. I'm sure in my younger and stronger days I've...

    I'm sure in my younger and stronger days I've spent maybe 6 hours in front of a machine, but I've never been a professional machinist. OTOH, I've no doubt production people of the past spent 12 hour...
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    Nice, but I'd want one for 3AT collets. Suppose I...

    Nice, but I'd want one for 3AT collets. Suppose I could put an extra plate on top but that's too much like work.
  3. Don Lancaster is an electronic and technology...

    Don Lancaster is an electronic and technology consultant. I've always liked the statement on his website-

    "Our secrecy policy: There ain't one. We do not normally do NDA's
    or any classified work...
  4. I've signed enough in my time, but have also seen...

    I've signed enough in my time, but have also seen some that try to protect what I consider to be common knowledge in a trade. If the wording looks like it could prevent you from doing something you...
  5. I don't know anything about the SB but my...

    I don't know anything about the SB but my reaction is, "of course you'd have to compound." My Logan feeds off the leadscrew, which is a lousy way to do it, so I never power feed. I've developed a...
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    I haven't blued one up, but have laid an optical...

    I haven't blued one up, but have laid an optical flat on them. Generally no trouble with flatness on a lump, but I can fight the thinner pieces just like everybody else. My B-S grinder isn't in what...
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    OTOH, if you approach it right, surface grinding...

    OTOH, if you approach it right, surface grinding is the easiest job in the shop. BTW, it's easier to grind hard steel than soft. Was the 1-2-3 block hard or soft? Wait, you scraped it, so probably...
  8. Also, when you use the same size screws the long...

    Also, when you use the same size screws the long suffering assembly person can assemble it with one wrench, hex key or whatever!
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    Well, grinder not in good shape, surface plate...

    Well, grinder not in good shape, surface plate not flat or you ground a very heavy pass and heated the heck out of it. Need more info and you'll probably have to do some test grinds. I'm assuming the...
  10. Does a human even touch those parts? When I wear...

    Does a human even touch those parts? When I wear my designer hat, I detest interpolated holes. On precision parts they've given me nothing but trouble because they're never round. Just because you...
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    Be careful with the IR thermometer. Unless you...

    Be careful with the IR thermometer. Unless you know the emissivity of the part, the reading is likely to be in error, and that error will likely be to the low side. A spot of hi-temp black paint is...
  12. Too bad about Bauer. I think that's what we have...

    Too bad about Bauer. I think that's what we have at work and it does a great job. If you bought a used one, could you install a longer rod to get the bigger throat?
  13. Button head screws suck. When they strip out, SOP...

    Button head screws suck. When they strip out, SOP is to slot them with a cutoff wheel and Mototool, then use a big screwdriver.
  14. Random thoughts- If you're going to skimp on...

    Random thoughts- If you're going to skimp on quoting, quote high, as you'll certainly miss something. And that something is never in your favor. What can you make the most money on with the least...
  15. The V-block is better for things that need an...

    The V-block is better for things that need an offset or aren't running on-center. 5C would be great for quick work with round stuff. I spend a lot of time indicating things in.
  16. We used to have a Sweco machine, probably just...

    We used to have a Sweco machine, probably just under 3' across. Reasonably quiet, at least quieter than the rest of the shop. The high energy units might make more noise, but they'll be done in a...
  17. It's a remarkably handy thing, for both (light)...

    It's a remarkably handy thing, for both (light) mill work and grinder, but there are far cheaper ways to get the job done. IMO, one of its claims to fame is the accuracy of the preset angles.
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    I never use T-handle wrenches to freehand small...

    I never use T-handle wrenches to freehand small taps because it's a recipe for disaster. Starrett 162 pin vise, usually the D size, is the way to go.
  19. I'm not sure it needs to be dead on, as the plate...

    I'm not sure it needs to be dead on, as the plate is always adjusted on the shaft as the last step. The plate needs enough clearance in the screw holes to do that.
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    I'm guessing you were plunging straight in....

    I'm guessing you were plunging straight in. Probably need to come in at 29 degrees, make the tool sharper and maybe more relief angle. It's very easy to roll the edge of a tool while grinding it,...
  21. Vertical integration just isn't done here...

    Vertical integration just isn't done here anymore. There are small shops overseas that specialize in certain things like small precision shafts, that have grinding, heat treating and Harperizing all...
  22. One of those grinding doc videos talked about...

    One of those grinding doc videos talked about clusters. Apparently they work well, but you have to traverse them extremely fast to get the desired results. Used like a single point diamond, they...
  23. See my post #15 in the OP's previous question-...

    See my post #15 in the OP's previous question- grinding wheel nomenclature - how to you remember it?
    I use more sophisticated stuff than most people have, but any accelerometer that gives you a...
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    No specific knowledge as I only wind springs from...

    No specific knowledge as I only wind springs from music wire, but that design could be trouble. I'd want to analyze the stresses to make sure it's well within material limits. No reason it can't last...
  25. Good demo. That's about the speed I dress a...

    Good demo. That's about the speed I dress a wheel. Single pass only. I know people balance wheels by removing material, but I just can't get comfortable with it. I also know static balancing is the...
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