
| Specification | Details |
|---|---|
| Brand | INSIZE |
| Model | 3229-400 |
| Product Type | Tubular Inside Micrometer |
| Measuring Range | 375–400 mm |
| Graduation | 0.01 mm |
| Accuracy | 10 µm |
| Type | C |
| Measuring Faces | Carbide |
| Display | Mechanical / Analogue |
The INSIZE 3229-400 Tubular Inside Micrometer is a precision mechanical measuring instrument designed for accurate measurement of internal dimensions, bores, holes, and other internal features in the 375–400 mm range. It features a 0.01 mm graduation and 10 µm accuracy, making it suitable for dimensional inspection in machining, manufacturing, engineering, and quality-control applications. The tubular inside micrometer uses carbide measuring faces for durable contact and is designed for precision internal measurement of large components. Micrometers in this series up to 500 mm meet DIN 863-4 requirements.
Key Features
1. 375–400mm Measuring Range
The 3229-400 provides a measuring range of 375–400 mm, making it suitable for measuring larger internal dimensions such as bores, cylinders, housings, and machined components.
2. Fine 0.01mm Graduation
The micrometer features a 0.01 mm graduation, allowing users to take detailed mechanical measurements during machining inspection, manufacturing, and quality-control operations.
3. 10µm Accuracy
The 3229-400 is specified with 10 µm accuracy, providing suitable precision for dimensional inspection of compatible large internal features.
4. Carbide Measuring Faces
The tubular inside micrometer incorporates carbide measuring faces, providing durable contact surfaces for repeated internal-dimension measurement and regular workshop use.
5. DIN 863-4 Design
INSIZE specifies that tubular inside micrometers in this series up to 500 mm meet DIN 863-4, providing a recognized standard for the instrument's design and measurement application.
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