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Ways to measure holes center to center?

Discussion in 'METROLOGY - MEASURE, SETUP & FIT' started by Uglydog, Jun 14, 2017.

  1. BGHansen

    BGHansen United States H-M Supporter - Premium Content H-M Supporter-Premium

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    Here's the 13" Sorenson I picked up off eBay for $50 plus shipping. Pretty happy with the mike, hit the same 11.000" every time on the standard. Daryl, thanks again for the tip!

    Bruce

    20170623_140900.jpg
     
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  2. Dresden

    Dresden United States Iron Registered Member

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    Daryl, I suggest you just ask Dennis, your scraping instructor
     
  3. Dr. B

    Dr. B United States Swarf Registered Member

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    If the holes are the same diameter, may I suggest merely measuring left-edge to left-edge or right-edge to right-edge?
     
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  4. gr8legs

    gr8legs Active User H-M Supporter-Premium

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    After reading about the Sorenson Center Mike I knew I had to have one (It regularly made me crazy to try to accurately find the distance between two holes). All I can say is that the Center Mike is slicker than boiled owl snot. Wow. What it does is measures the near distance and the far distance, mechanically adds them together and divides by two, which is the indication on the Vernier. Takes 10 seconds and indicates to 0.001

    They sell on eBay very reasonably and if you ever need to measure hole center-to-center distances this will become your go-to tool.

    Stu
     
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  5. Uglydog

    Uglydog United States Active User H-M Supporter-Premium

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    gr8legs,
    Which length Sorenson did you purchase?
    I've wondered if there is any advantage with the little one. They appear to function the same.

    Daryl
    MN
     
  6. BGHansen

    BGHansen United States H-M Supporter - Premium Content H-M Supporter-Premium

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    Pretty sure the function is the same regardless of size. The vernier scale is double-sized; 1.000" measured is 2.000" on the Sorenson scale. Pretty simple (but ingenious) device. Start with the LH side at 0.000", measure the distance between the holes on the inside (or outside would work too, just have to do the opposite on the second measurement). Then slide the LH stop from zero to the RH which now starts your next measurement at "where you left off". Do the 2nd measurement and because the scale on the Sorenson is 2X, you are reading the total of the inside and outside dimensions divided by two. Pure genius!

    Bruce
     
  7. gr8legs

    gr8legs Active User H-M Supporter-Premium

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    I purchased the 8" version and liked it so much (and besides that, I'm a tool junkie) I just eBay'd a 13" one plus the measurement extension bars.

    It's a horrible addiction with no 12-step program. Luckily, this site serves as a support group - the only difference being it's a cheering section :)

    Stu
     
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  8. Uglydog

    Uglydog United States Active User H-M Supporter-Premium

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    If you get a chance, I'm looking forward to hearing about how the extension bars work for you.
    My projects tend to be on a larger scale.

    Thank you,
    Daryl
    MN
     

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