C-20CMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.Tubular Inside MicrometersSERIES 137 — Extension Rod Type (main unit)• Micrometer head for Extension Rod Type inside micrometer.• The sleeve is rotated to adjust the reference point adjustment when setting to a length standard.• Optional Setting Rings and Gauge Block Accessory Sets are available as reference gages for datum adjustment. (Refer to pages C-47 and E-17 to E-20 for details) 137-011SPECIFICATIONSMetricOrder No.Range (mm)Graduation (mm)Micrometer head stroke (mm)137-01150 - 630.0113Carbide-tipped137-013InchOrder No.Range (in)Graduation (in)Micrometer head stroke (in)137-0122 - 2.50.0010.5Carbide-tipped137-014DIMENSIONSUnit: mm23154.81.7501.723ø5ø41488ø4ø154.81.7ø450SR10SR10137-205137-011Extension PipeCoverSR10SR10(M10×1)23ø154.8Extension PipeCover(M10×1)Technical Data • Spindle feed error 3 μm/0.00015 in Note: "Spindle feed error” refers to the difference between the maximum and minimum indication error values within the specication range of the micrometer head

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