| Specification | Details |
|---|---|
| Brand | INSIZE |
| Model | 3290-257A |
| Product Type | V-Anvil Micrometer |
| Measuring Range | 5–25 mm |
| Graduation | 0.01 mm |
| Accuracy | 4 µm |
| Flutes | 7 |
| Anvil Type | V-Anvil |
| Measuring Faces | Carbide |
| Thimble Type | Ratchet Stop |
The INSIZE 3290-257A V-Anvil Micrometer is a precision mechanical measuring instrument designed for accurate outside-diameter measurement of odd-fluted cutting tools and components, including taps, reamers, and end mills. It provides a 5–25 mm measuring range, 0.01 mm graduation, and 4 µm accuracy, making it suitable for precision inspection and quality-control applications. The 7-flute V-anvil configuration is designed to accommodate suitable odd-groove cutting tools, while the carbide measuring faces provide durable contact surfaces for repeated use. A ratchet stop helps maintain consistent measuring force, and a setting standard is supplied for the applicable measuring range.
Key Features
1. 5–25mm Measuring Range
The 3290-257A provides a 5–25 mm measuring range, making it suitable for measuring the outside diameter of compatible small cutting tools and components.
2. 7-Flute V-Anvil Configuration
The micrometer features a 7-flute V-anvil configuration, designed specifically for measuring suitable odd-fluted cutting tools and components where conventional outside micrometers may not provide the appropriate contact arrangement.
3. 0.01mm Graduation & 4µm Accuracy
The 0.01 mm graduation allows detailed dimensional readings, while the specified 4 µm accuracy provides precision suitable for machining inspection and quality-control applications.
4. Carbide Measuring Faces
The 3290-257A incorporates carbide measuring faces, providing durable contact surfaces designed for repeated measurement of suitable cutting tools and components.
5. Ratchet Stop & Setting Standard
The ratchet stop helps maintain controlled measuring pressure for repeatable readings. The 3290-257A is also supplied with a setting standard, supporting setup and measurement accuracy.
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