3-Point Internal Micrometer Holtest Set

Mitutoyo Holtest Economy – three-point internal micrometer for accurate hole measurements

The Mitutoyo Holtest Economy series offers a more affordable alternative for accurate measurement of internal diameters, while maintaining the well-known basic features of the Holtest series: ease of use, three-point self-centering, and reliable measurement principle. The Economy models are designed for the user who needs a functional and accurate internal measuring instrument without the full equipment level of the premium series or the carbide and surface treatment solutions.

The three-point measuring system automatically positions the micrometer on the centerline of the hole, resulting in measurements that are more balanced, symmetrical, and less user-dependent. The Economy Series Holtest micrometer gives the actual inside diameter, not merely the distance between two points, so the measurement result matches the actual geometry of the hole.

The measuring surfaces of the Economy models are typically hardened tool steel, not carbide coated as in the more complete Holtest series. This makes Economy models a cost-effective option for situations where the instrument is not used continuously under heavy conditions or where the measurement environment is not particularly abrasive. Yet the measuring surfaces are carefully finished and provide good contact even at low measuring forces. The Economy series is an ideal choice for applications such as workshops and maintenance where internal measurements are made regularly, but not under the constant load of mass production.

All Holtest Economy models use a ratchet-stop mechanism to ensure constant measuring force and consistent measurement results. This feature is particularly appreciated when different users need to obtain the same measurement result or when measurements are made serially. The constant force prevents excessive compression and potential measurement errors from manual tightening without a limiter.

Economy series models are available in a range of measuring ranges, and sets may include different numbers of units and possibly an extension arm for deep holes. Often the package also includes a setting gauge for accurate calibration of the meter reset and a storage case to protect the instrument during transport and storage. The equipment level of the Economy series is lighter than the premium Holtest series, but the overall design is tailored for cost-effective and functional use.

The Holtest Economy series is ideal for measuring internal diameters in bushings, tubes, machined holes, and other cylindrical components where accurate and repeatable internal dimensions are required. The series offers a technically sound and reliable solution for workshops, repair shops, light production, and quality control.