Key Features
- Mechanical design without counter – lightweight and rugged for shipboard use
- Interchangeable groove anvils for versatility across multiple bore sizes
- Hardened steel construction resists corrosion and wear in marine environments
- Clear graduation marks with ratchet-stop mechanism for consistent measuring force
- Supports precision measurement of internal grooves, slots, and recesses in engine components
- Meets classification society standards for accuracy and repeatability
Technical Specifications
| Model | IMPA 650451 |
|---|---|
| Type | Mechanical internal groove micrometer (without counter) |
| Measuring Range | 5 – 25 mm / 0.2 – 1 in |
| Graduation | 0.01 mm / 0.0005 in |
| Accuracy | ±0.005 mm |
| Anvil Type | Interchangeable groove anvils |
| Frame Material | Hardened steel |
| Spindle | Ground and lapped, hardened steel |
| Lock Nut | Yes |
| Ratchet Stop | Yes |
| Weight | Approx. 0.4 kg |
| Application | Marine engine overhaul, internal groove measurement, QC inspection |
Frequently Asked Questions
What is an internal groove micrometer used for?
An internal groove micrometer is designed to measure the width or diameter of internal grooves, recesses, and undercuts in bores and housings – critical for sealing seats and retaining rings in marine machinery.
Does this micrometer have a digital counter?
No, this model is a traditional mechanical micrometer without a counter. It offers direct reading from the sleeve and thimble graduations, ensuring reliability even when digital electronics may be exposed to moisture and vibration.
What is the measuring range available?
The standard range is 5 to 25 mm (0.2 to 1 inch), with interchangeable anvils that allow you to adapt to different groove widths. Additional anvils can be ordered separately to extend the range.
Is this tool suitable for offshore and marine use?
Yes, the micrometer is constructed from corrosion-resistant hardened steel and is designed for reliable performance in harsh shipboard environments, including engine rooms and repair workshops.
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