647 Dial Comparator 00001

647, 647M Dial Comparators
Dial Comparator Indicator, 0-.004" Range, 20-0-20, .00005" Grads, Range Per Rev, .375" Stem

The Starrett 647 Dial Comparator Indicators offer a high degree of security and precision. They are based on a solid and well thought-out construction taking into account the latest technology. They are manufactured by the most up-to-date methods.

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  • Effective non-shock mechanism
  • Pinions and shafts of the movement are jeweled
  • After removal of the safety cap the adjustment screw on top of the case allows simple andsafe zero setting of the instrument over the total measuring
  • A safety cap prevents unintentional turning of the fine adjustment screws
  • Stem and spindle are made of hardened stainless steel
  • The measuring spindles are very sensitive on account of theiraccurate guides
  • Additional overtravel assists with the insertion of workpieces into the measuring device
  • The clear scale is shadow free
  • The red tolerance markers are easy to recognize and to set
  • Furnished with flat back


  • Made in America: No
  • Graduations (in): .00005"
  • Total Range (in): .004"
  • Dial Reading: 20-0-20
  • Dial Color: White
  • Stem Diameter (in): .375"
  • Accuracy (in): DIN 879-1


    2D Dimensional Drawing (PDF)



    127.20 kb
    647 Comparator Gage Indicators (Bulletin 451)

    Datasheet with basic product overview, features, and specifications.

    [1 page]

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