Mitutoyo Tubular Inside Micrometers


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Mitutoyo Tubular Inside Micrometers

Series 137 - Extension Rod Type
Series 139 - Extension Pipe type
Series 140 - Extension Pipe Type

This is an extension pipe type inside micrometer that offers you the following benefits:

  • Interchangeable extensions in a hollow pipe design
  • Carbide measuring faces


  • Wide range of ID measurements by combining extension rods (pipes) and anvils with the micrometer head.
  • Carbide-tipped measuring faces are available. (series 137)
  • The 139 and 140 series use highly-durable/ large-diameter extension pipes.
  • Series 137 supplid in fitted plastic case except 1550mm/60in come in wooden case.
  • Series 139 supplied in fitted wooden case except 500mm/20in come in plastic case.
  • Series 140 supplied in fitted wooden case.

Technical Data:

Accuracy: ±(.00012+.00005n+(.00004×R/2))in
Graduation: 0.01mm or .001"

* with carbide tipped face: 137-014, 137-216, 137-217, 137-218, 137-219, 137-220