647 Dial Comparator 00001

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


  • 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 Dial Comparator Indicator User Guide (Form 979)

    Brochure on how to use the Dial Comparator Indicator and how to care for it

    647 Comparator Gage Indicators (Bulletin 451)

    Datasheet with basic product overview, features, and specifications.