Tubular Inside Micrometer, Hardened Face

The 137 series models provide an accurate and flexible solution for measuring inside diameters when the measuring range varies. The measurement system based on extension rods allows the same micrometer for a wide range of internal diameters without the need for separate instruments. This model is practical for use in machine shops, measuring laboratories, and workshops.

Features:

- Measuring range: 50-300mm (Drum and extension rod combinations supplied)
- Extension rods: 13mm, 25mm, 50mm (2 pcs) and 100mm extension rods included
- Measuring surfaces: hardened steel measuring surfaces, which provide good wear resistance for most common measurement applications.
- Scale: 0.01mm analogue reading
- Measurement type: two-point inside diameter measurement for holes, bushings, tubes, and cylinders.