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  1. G

    Dial indicator disassembly

    Automotive scratch remove polish works also.
  2. G

    Understanding uncertainty and how to report it

    If you use an accredited ISO 17025 calibration lab, they must report uncertainty. Some offer cheaper unaccredited reports though.
  3. G

    Optical instrument for PCD insert's setting

    Check out Edmund Optics for their line of telecentric lenses. Reasonable priced and telecentric is a huge boon in a measuring system.
  4. G

    Center gage: fake or real

    The engraving looks nice, I say it is real.
  5. G

    Do length standards grow over time ?

    I have a 400 mm engraved scale, Made by the Swiss firm SIP. It came from one of their measuring machines. Made around 1960, and came with SIP calibration. I had this calibrated at NIST, came back with an k=2 uncertainty of about 0.3um and the measured dimension matched the SIP values very...
  6. G

    SPI Elect-Mike a historical digital micrometer

    Took a while for the filing system of my brain to dig out the original manufacturer, which is Quality Measurement Systems, Inc. of Penfield, NY Here is a mention of the guy that founded it; https://brucerrobinson.weebly.com/ One of the patents for another scale...
  7. G

    High accuracy angle measurement

    Here is my take: -Best (simplest) way is to use a set of go, no go gauges , looking for light coming through the gap. This does not give you a quantitative measurement though. -An optical comparator may let you measure directly, some have 1 minute of arc resolution on the rotating screen...
  8. G

    High accuracy angle measurement

    I like the idea of making go and no go gauges. Trying to make direct measurement on such short angle leg lengths (to use trig) will result in huge error.
  9. G

    SPI Elect-Mike a historical digital micrometer

    I used to use one of those way back. I think it was made by a local company near Rochester NY. Has a glass scale and opto encoder inside. Measures about 1.5 inches if I remember.
  10. G

    Tool Scope

    Maybe something from here would work; https://www.titantoolsupply.com/Default
  11. G

    Grease discontinued. Switching way lube to oil?

    Nye Lubricants may have a proper substitute.
  12. G

    Rotary table/dividing head calibration with theodolite

    A note about damping grease; NYE makes some excellent versions. In optical instruments , it is hard to beat the silky smooth feel with the proper grease. I suggest you use the extra light damping grease, even medium has much more drag than you would expect.
  13. G

    Calibrating Mitutoyo 0-12" depth mic set

    Uline is a source for VCI paper.
  14. G

    Darkening tool graduations

    Yes, Lacquer Stick; I have used these on cameras too. https://www.amazon.com/MRK51123-co-Industries-Lacquer-Stik-Fill/dp/B002BYWUMO/ref=sr_1_2?crid=14MKVILFHGNT4&keywords=lacquer+stick&qid=1659445878&sprefix=lacquer+stick%2Caps%2C95&sr=8-2
  15. G

    - What Brand CMM Should I Buy? -

    For long term accuracy, it is hard to beat granite air bearings on all the axis.
  16. G

    OT A1 Canon Camera

    Not a Sony, But the Olympus and Panasonic micro 4/3 cameras can accept any lens. They are mirroless digital camera with very short backfocus so a cheap T type adapter hooks up to any lens.
  17. G

    Garden / mowing tractor any built these days with a horizontal shaft engine

    I kind of bought a tractor by accident (a Kubota BX2230 at an estate sale). I needed a mower and it was close enough that I could drive it where it needed to be. Turns out I did need a tractor! I don't have the front end loader that many do, but the mower deck and 3 point accessory connectors on...
  18. G

    Wild Heerbrugg M20 microscope. What's it worth and do I "need" it?

    I would say worth $50-100 as it sits.
  19. G

    ISO9000 and AS9100

    We got certified ISO 9000 about 3 years ago, then as an ISO 17025 (calibration Lab) two years ago. My advice is; -Write your procedures based on what you actually do, not what you intend to do. -Don't make procedure too detailed, (to easy to lock yourself in a corner come audit time) -Find a...
  20. G

    substitute for Formby tung oil

    Not quite the same, but I like Watco Danish Oil. I never considered it for years, thinking it was just oil. It is combo of penetrating oil and varnish (not poly-urethane). Super easy to apply (wipe on, wait 15 minutes, wipe off, wait overnight, apply more coats if desired). I have an old...

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