INSIZE 3205-72 Outside Micrometer With Extension Anvil Collar
Are you looking for a large-range, high-precision outside micrometer designed for measuring very large diameters or external surfaces in the 64″ to 72″ range? The INSIZE 3205-72 is has an extension anvil collar design allows the micrometer to adapt across a long measuring span, making it ideal for heavy-duty industrial, fabrication, or large-scale machining applications. With fine graduation, wear-resistant carbide faces, and a stable C-frame structure, this micrometer delivers accurate, repeatable measurements on large parts.
Key Features
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Wide Measuring Range (64″ to 72″): Perfect for measuring the external diameter of large cylindrical workpieces, pipes, or structural components.
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Fine Graduation: Features a resolution of 0.0005″, enabling very precise measurement.
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Carbide Measuring Faces: Both the anvil and spindle tips are made of carbide, improving durability and maintaining accuracy over time.
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Ratchet Stop: Helps apply consistent measuring force and avoids over-tightening, improving repeatability.
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Adjustable Collar/Extension Anvil: The extension anvil collar allows the anvil length to be adjusted for different points within the 64 to 72″ range, giving flexibility without needing multiple micrometers.
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Setting Standards Included: Comes with calibration / setting standards so you can verify and zero the micrometer for accurate measurement.
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Hollow (“Pipe”) Frame Design: Likely built with a hollow C-frame for lighter overall weight while retaining rigidity.
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Durable Construction: Built to last with high-quality materials and a design suited for shop floor / industrial use.
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Comes in a Fitted Wooden Storage Case: Compact protection during transport and storage.
Specifications
| Model / Code |
3205-72 |
| Measuring Range |
64″ – 72″ |
| Graduation / Resolution |
0.0005″ |
| Accuracy |
± 0.00122″ |
| Measuring Faces |
Carbide |
| Thimble / Stop Type |
Ratchet stop |
| Display / Readout |
Mechanical / Vernier-style |
| Frame |
Welded / Hollow “pipe” C-frame |
| Lock Type |
Lock nut (to secure spindle position) |
| Included Standards |
Yes — setting / calibration standards included |
| Storage / Case |
Wooden / fitted case |
Items Included
- The micrometer body with extension-collar anvil
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Adjustable anvil collar (to extend the reach for 64" to 72″)
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Setting standards (calibration rods or reference rings) for zeroing / calibration
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Zero adjusting wrench to fine-tune the micrometer reading
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Fitted wooden storage case to protect the micrometer when not in use
- Instruction / user manual
Insize 3205-72 Outside Micrometer With Extension Anvil Collar Manual
