dial indicator help

Discussion in 'Gunsmithing' started by rscott5028, Mar 31, 2011.

  1. rscott5028

    rscott5028 Well-Known Member

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    I'm getting set to chamber my first barrel on my new Grizzly and was watching Gordy Gritter's DVD.

    He makes a big deal out of dialing in the bore to less than .0001" and points out the extra long contact point on his indicator which happens to be a Mitutoyo 513-504 as shown when they zoom in close.

    So, I thought I should get one just like it. But when I look around, I can't find that model with an extra long tip. In fact, I can't find any .0001" horizontal style indicators with an extra long tip. The best I've come up with is .0005".

    Did Mitutoyo make a model 513-504 with .0001" accuracy/graduation using an extra long tip/contact point?

    Or, did he simply replace the standard tip with an extra long one?

    And if so, wouldn't that reduce the accuracy back down to about .0005" except that it's no long calibrated or reading accurately?

    As far as dialing in goes, calibration is less relevant since you're trying to get as close to zero as possible. But, I don't want to kid myself about the true accuracy of the setup either.

    Thanks!
    Richard
     
  2. Trickymissfit

    Trickymissfit Well-Known Member

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    Interrapid and Federal both make long wand dial indicators. Some have the 90 degree face and some are more conventional. Personally I don't like .0001" indicators all that much, and 99% of the work I need them for can be done easier with a good quality .0005" zero backlash dial indicator.
    gary
     

  3. James H

    James H Well-Known Member

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    Richard,
    Gordy uses the 513-504 with the .0001" gradations on it. He uses a 1.5" stylus on it which does change the resolution. I think Gordy said the stylus he uses has a .080 dia ball on the end I use a .120 dia ball it crawls over the lands much easier.

    James
     
  4. rscott5028

    rscott5028 Well-Known Member

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    Thanks Gary and James.

    That's about what I thought. But, I just wanted to doublecheck.

    thanks!
     
  5. bigngreen

    bigngreen Well-Known Member

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    Hey, wait a minute!!! Where's the pics of the new set up!!!!:D
     
  6. James H

    James H Well-Known Member

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    Richard,
    One other thing you will notice in the video is that when he has the indicator against the "Grizzly rod" he has it "choked up" closer to increase the accuracy of the indicator.

    James
     
  7. rscott5028

    rscott5028 Well-Known Member

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    Here it is... I had to do something to get my son off the X-Box.... I told him I'd order the lathe as soon as he watched Darrel Holland's entire Machine Shop DVD set and pass a test.

    It got here so fast, I don't even have tooling yet.

    [​IMG]
     
  8. Moman

    Moman Well-Known Member

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    Looking good Richard, happy for you. I saw on another site where Gordy posted the catalog numbers of exactly what he uses for his indicator set up. They are all MSC numbers.

    06249411 Mitotoyu dial test indicator kit
    06445464 1 1/2" long indicator tip (.080" diameter which seems to work the best for dialing in bores)
    99046633 2 3/4" long indicator tip
    09560376 NOGA magnetic base/indicator holder
     
  9. rscott5028

    rscott5028 Well-Known Member

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    Thanks all!!!
     
  10. bigngreen

    bigngreen Well-Known Member

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    Now that is motivation of the best kind!! Can't wait the see some work in progress pics.

    I have a few indicators but all cheap ones for work except the one I use for guns which is only a .0005 but I use it short while waiting to pic up a high end .0001 I really like my Noga base and holder, I can get it into position easily and not fumble farting around!
     
  11. Trickymissfit

    Trickymissfit Well-Known Member

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    I have a .0001" Interrapid, plus about a half dozen others in that range. The Interrapid in .0001" is extremely touchy, but is deadly accurate. Yet the .0005" is very forgiving. The Brown & Sharpe Best Test is very similar to the Interrapid in design and quality. I see no advantage with the .080" tip on the wand unless your doing extremely small holes. Personally I would drag out one of my Federal .000050" indicators if I had to be .0001" or less. But that's just my methodology. Now an Interrapid indicator is expensive (about $180), and will spoil you very quickly! Have no idea about the cost of the B&S, but have used many of them over the years. The Federals are pretty good as well, but the other two are a little better due to the zero lag feature.
    gary
     
  12. rscott5028

    rscott5028 Well-Known Member

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    Good info. Thanks Gary, et. al.

    I'm way over budget for this hobby/addiction. And, have several projects I'm ready to dive into.

    I suppose I need to spend a little more on at least one good indicator. I have plenty of cheap ones (.0005" and .0001"). But, cheap stuff always ends up costing more. So, I guess I'll take my time and make the tools that I can such as the jigs.

    Thanks!
    Richard
     
  13. Trickymissfit

    Trickymissfit Well-Known Member

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    The average Joe can get by most of the time with a B&S "Last Word." But if your working at less than .0005" you need a good indicator. Most all indicators are designed to be in one position and not moved. When you rotate a dial indicator you add built in lag (nature of the beast). Some are as high as 10% and some are less than 3%. The Interrapid and the Best Test are true zero lag indicators, so you can safely turn them upside down and rely on the reading you see. I probably own thirty or forty dial indicators in one form or another (cigar boxes full of them). But when I used to work very close it was always the Interrapids, or a pair of very special one tenth dial indicators (fully jewelled 3% gear & rack jobs that only had ten thousandths travel). The .000050" indicators started out as a joke on me, but they did have their uses. I did have three .000020" indicators that were extremely accurate, and were used to check surface plates (I sent them back to Federal once a year for cleaning and rebuilding). If you keep the indicator in a static position most all will do the job well as long as they meet Federal specs. Do avoid the Chinese ones! But Mitutoyos are not all that bad.
    gary
     
  14. rscott5028

    rscott5028 Well-Known Member

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    ... and I thought .000050" was a typo!

    In any case, I don't have customers to please. So as long as I'm paying attention to all the safety issues, I don't have to achieve perfection day 1.

    Thanks!
    Richard