Starrett 128 Reading Combination Head, with Inside Micrometers, 0-2" Range, 0.0005" Graduation
- Inch reading combination head with setting master
Details: The starrett combination head for inside micrometers combines the precision of a dial indicator sensor and the linear accuracy of a micrometer. This combination of indicator and micrometer reduces the need for operator "feel" and provides faster readings with increased reliability. This head is interchangeable with the starrett no. 128 series end rods and extension combinations. For inch-reading tools, the head can be adjusted within a range of 2". It extends the overall range by an additional 5". The special no. 81-138J jeweled non-shock indicator is graduated 0.0005", range +/- 0.040" and reads 0-40 on both the plus and minus dials. The 10" master should be used vertically with the shoulder on the indicator end of the head, seated squarely.