| Specification | Details |
|---|---|
| Brand | INSIZE |
| Model | 3287-251B |
| Product Type | Groove Micrometer |
| Outside Measuring Range | 0–25mm |
| Inside Measuring Range | 1.6–26.5mm |
| Graduation | 0.01mm |
| Accuracy | 10µm |
| Readout | Analogue |
| Spindle Type | Non-Rotating |
| Ratchet Stop | Two-Directional |
| Measurement Type | Inside & Outside |
The INSIZE 3287-251B Groove Micrometer is a specialized precision mechanical measuring instrument designed to measure the width and position of grooves, including grooves located inside bores. It offers a 0–25mm outside measuring range and 1.6–26.5mm inside measuring range, making it suitable for inspecting grooves, keyways, and recessed features. The 3287-251B features a compact 90mm overall length, 0.01mm graduation, non-rotating spindle, two graduations for inside and outside measurements, and a two-directional ratchet stop. Unlike the standard 3287-B models, the 3287-251B does not have a sleeve, providing a compact configuration for specialized groove measurement applications.
Key Features
1. Specialized Groove Measurement
The 3287-251B is designed to measure the width and position of grooves, including grooves inside suitable bores. It is useful for inspecting recessed features that may be difficult to measure with conventional micrometers.
2. Inside & Outside Measurement
The micrometer provides a 0–25mm outside measuring range and 1.6–26.5mm inside measuring range, allowing it to be used for both external and internal groove measurement applications.
3. Fine 0.01mm Graduation
With 0.01mm graduation, the 3287-251B provides detailed analogue readings for dimensional inspection and machining applications.
4. Compact 90mm Design
The 90mm overall length makes the 3287-251B more compact than the standard 3287-25B. Its smaller measuring-head dimensions are useful where access and compact tool geometry are important.
5. Non-Rotating Spindle & Two-Directional Ratchet
The non-rotating spindle helps maintain stable contact during measurement, while the two-directional ratchet stop supports controlled and repeatable operation.
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