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  1. Replies
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    The general idea is that whatever temperature you...

    The general idea is that whatever temperature you maintain, you report the value of that temperature and state if you have compensated the reported value to be at 68F.(or not). In our prep for 17025...
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    1,872

    Keyence has a brand new model which has a very...

    Keyence has a brand new model which has a very wide field of view and I think does very fancy 3D analysis.
    maybe one of these:
    Microscopes / 3D Surface Profilers | KEYENCE America
  3. Replies
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    3,653

    I used to have a Leitz toolmakers scope with...

    I used to have a Leitz toolmakers scope with embedded scales. Measuremets had to be by taking two readings and subtracting the difference between the two.
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    re: How do encoder in digital micrometers work. ...

    re: How do encoder in digital micrometers work.

    They use a rotary encoder instead of linear. So, backlash and accuracy of the screw thread is still an issue.
  5. A couple more things to keep in mind; -If the...

    A couple more things to keep in mind;
    -If the measuring tool is the same material, and they have reached equal temperature, measurements will be accurate.
    -Materials and tools must be the same...
  6. A few thoughts- You mention Delrin; when...

    A few thoughts-
    You mention Delrin; when measuring this and most plastics, the humidity coefficient of expansion can be ten times more than the thermal, so now you have something new to worry about....
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    A CO-2 laser likes organic materials to mark. It...

    A CO-2 laser likes organic materials to mark. It reflects too much to mark metals. An outfit called Full Spectrum Laser ( Full Spectrum Laser | Lasers for Cutting and Engraving) has an interesting...
  8. Here is a real solution (for cell phones at...

    Here is a real solution (for cell phones at least): call blockers

    The 7 Best Call Blocker Apps For Smartphones

    On my Android phone I use an app named "Should I answer" which is a crowd...
  9. Thread: Micrometer Oil

    by greif1
    Replies
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    15,160

    I seem to remember that 30 or more years ago...

    I seem to remember that 30 or more years ago Starrett used to refer to all its oils ad "M-1", even though the spray stuff was not the same as "Tool and Instrument Oil"

    I have been told that...
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    Most straightforward for the x-y plane is a glass...

    Most straightforward for the x-y plane is a glass grid with calibrated points. Mitutoyo has am accredited calibration center that can calibrate these. This can check x,y, and angular accuracy all at...
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    Webber gage blocks has this to say: Stoning...

    Webber gage blocks has this to say:

    Stoning Gage Blocks

    Webber makes several gage block stones, shown in this brochure,on page 478

    http://www.jwdonchin.com/Starrett/Catalog/pdf/445.pdf
    Part...
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    Optical flats are made to test flatness by being...

    Optical flats are made to test flatness by being in contact with an object. Unless it is made specifically for testing micrometer face parallelism (like the Mitutoyo set made for that) it is unlikely...
  13. Lempco ball bearing die set/die shoes for sale

    Danly, Producto, style die shoe dieset, Lempco Ball Bearing 5"x 7.5" table | eBay

    $100 Buy it now
    Danly style die shoe dieset, Lempco Ball Bearing , 11 x 7.5 " (wxL) overall

    Lempco All...
  14. The offset cross-hair lines are so you can see...

    The offset cross-hair lines are so you can see the edge exposed from one side and the edge coming up to the line on the other side. It helps make more repeatable readings because the judgement of...
  15. Thorlabs makes very nice stuff for use on optical...

    Thorlabs makes very nice stuff for use on optical tables, quite a bit cheaper than the other optical type vendors. They have a huge selection (paper catalog is ~4 inches thick!). Thorlabs also sends...
  16. Maybe add a pawl to the arm so that on first...

    Maybe add a pawl to the arm so that on first travel down it passes smoothly, but the bounce up ratchets it so that on the way down the second time it stops. Going up from this position would then...
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    Moore Special Tool had a series of books which...

    Moore Special Tool had a series of books which show some extremes of metrology.

    This is a PDF of the actual book!...
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    Be very careful not to scratch the encoder disc...

    Be very careful not to scratch the encoder disc (which is photo film).
    Yes, disassembly is a pain!
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    Mil spec ink from here: Government...

    Mil spec ink from here: Government Specifications - ACMI Epoxy Ink

    Clear coats:
    Military Topcoats, MIL-PRF-85285 | Creative Coatings Co
  20. I decided to look up what the Stronghold Site...

    I decided to look up what the Stronghold Site actually said about this "shill" auction bid:

    20. RESERVE: The auctioneer reserves the right to reject any and all bids. On lots upon whichthere is a...
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    Inkjet color is way expensive and drys out if you...

    Inkjet color is way expensive and drys out if you don't use it enough.
    Color laser is also darn expensive (4 toner carts)
    Monochrome laser can be dirt cheap. The business grade HP units are solid....
  22. Try the Alconox line of laboratory detergents....

    Try the Alconox line of laboratory detergents. You can get alkaline, neutral, or acidic which will work in ultrasonic. In addition to the detergent reaction, you may have seen galvanic if the parts...
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    Maybe you want a big button cell phone: ...

    Maybe you want a big button cell phone:

    https://www.snapfon.com/big-button-cell-phone/

    https://www.amazon.com/slp/large-button-cell-phone/4u5vma6f3ujw9hz
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    I second the Deoxit suggestion. Caig Labs calls...

    I second the Deoxit suggestion. Caig Labs calls several products Deoxit; you want CAIG DeOxit Cleaning Solution Spray, 5% spray or the 100% non spray version.


    DeoxIT(R) D5S-6, More than a...
  25. A fluorescent lamp with a clear green Plexiglas...

    A fluorescent lamp with a clear green Plexiglas filter (or similar) should provide a serviceable light source. The 546.1 nm mercury peak will predominate.

    Type fluorescent lamp spectrum:...
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