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[Metrology] Looking for a good depth Mic..?

Discussion in 'METROLOGY - MEASURE, SETUP & FIT' started by EmilioG, Mar 20, 2017 at 6:59 PM.

  1. EmilioG

    EmilioG United States Active User H-M Supporter-Premium

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    I'm shopping for a new/used depth mic and leaning towards the Starrett 449 blade type/non-turning.
    What are your fav's what do you like and what don't you like, comments, suggestions all welcome.
    Thanks
     
  2. ghostdncr

    ghostdncr United States Active Member Active Member

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    B&S round spindle. I bought mine thirty years ago and have never found need for anything else, although I did grind up some new rods for 0-1" and 1-2" with .062 diameters on the ends for thinner work.
     
  3. mikey

    mikey Active User H-M Supporter-Premium

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    I have a Mitutoyo 129-type depth gauge with the interchangeable rods and the Mit 7200 dial depth gauge, an indicator with a depth base and interchangeable extensions. Both read in 0.001" increments. To be honest, I use the dial-type more often - quicker and easier to read and much faster when comparing depths of surfaces.
     
  4. Bob Korves

    Bob Korves H-M Supporter - Premium Content H-M Supporter-Premium

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    I have a Starrett 445 set with rods up to 9" plus spares, a B & S smaller set, and a Starrett 463 mic. head with a small accessory depth foot on it. I use the 463 head for most simple work, and it fits into tight places and is smooth and easy to get a good feel with, the bane of depth mics. To me, smooth and calibrated rules. With my 0-9" set, purchased used and with new Starrett rods having been added, I have no idea if it is properly in calibration for every rod, so I calibrate it for each different one I need to use and then mark it as being calibrated. About the only advantage to buying a quality new set is that it is likely properly calibrated. A cheaper or used set will need to be tested and possibly calibrated for each rod length...
     
    bobl likes this.
  5. EmilioG

    EmilioG United States Active User H-M Supporter-Premium

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    I just bought a Starrett 449 with 5 blades. 0-6". I like the non turning blades and this tool can measure thin slots and recesses.
    I'll post pics when it arrives. Now I'm looking for radius gages. I see they only go to 1/2" Are they available in larger sizes?
    I've had to resort to using washers for larger radii.
     
  6. mikey

    mikey Active User H-M Supporter-Premium

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    Dunno'. My Mit set only goes to 1/2" and its pretty big.
     
  7. Bob Korves

    Bob Korves H-M Supporter - Premium Content H-M Supporter-Premium

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  8. EmilioG

    EmilioG United States Active User H-M Supporter-Premium

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    Thanks. The larger sets are very expensive. I guess I'll keep using washers for now.
     
  9. Bob Korves

    Bob Korves H-M Supporter - Premium Content H-M Supporter-Premium

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    Of course that was MSC. Could be cheaper at the competition... I used MSC because I figured they would have some.
     
  10. mikey

    mikey Active User H-M Supporter-Premium

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    I just turn the OD I need from scrap delrin and use that. Seems like I can never find the washer I need when I need it.
     
  11. EmilioG

    EmilioG United States Active User H-M Supporter-Premium

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    Yes, I thought of that Mike, if I can't find the right diameter, that will be the next step. I'll use aluminum though.
    Bob, thank you. That's a good starting point. It was right under my nose, Msc.com
    I always wait for the sales. The radius I'm looking for is R .89"
     

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