IMPA: 650381

Outside Micrometers with Interchangeable Anvils for Marine Ship Maintenance

Precision outside micrometers with interchangeable anvils are essential measuring instruments in ship engineering, maintenance, and repair. Designed to deliver accurate outside diameter measurements of shafts, rods, cylinders, and machined components, this versatile micrometer set is a valuable addition to any marine toolbox. The IMPA 650381 micrometer features a rigid steel frame, hardened measuring faces, and a spindle with fine-thread precision for consistent, repeatable readings.

Equipped with multiple interchangeable anvils—including flat, spherical, and blade styles—the micrometer can adapt to various surface profiles, making it ideal for marine and offshore applications. Its ratchet stop ensures uniform measuring pressure, while the lock clamp holds measurements secure for documentation. Whether performing critical machinery alignments or routine maintenance inspections, this outside micrometer delivers the accuracy and durability demanded by maritime professionals.

Key Features

Technical Specifications

SpecificationDetails
Product TypeOutside Micrometer with Interchangeable Anvils
IMPA Code650381
Measurement Range0–25 mm (0–1 in)
Resolution0.01 mm / 0.0005 in
Accuracy±0.004 mm
Anvil TypesFlat, spherical, blade
Frame MaterialHeat-treated cast steel, enameled
SpindleHardened, ground, and lapped
Ratchet StopYes
Locking ClampYes
InsulationIntegrated insulating plates
Included AccessoriesSetting standard, wrench, protective case
StandardsDIN 863 / ISO 3611

Frequently Asked Questions

What is an outside micrometer with interchangeable anvils?

An outside micrometer is a precision instrument used to measure the outside diameter of objects. Interchangeable anvils allow it to accommodate different workpiece shapes, such as flat surfaces, curved surfaces, or grooves, by swapping the measuring face.

What measurement ranges are available?

This IMPA 650381 outside micrometer is commonly supplied with a 0–25 mm (0–1 in) range. Other ranges may be available upon request for marine ship supply orders.

Can I use this micrometer for measuring the thickness of sheet metal?

Yes, the standard flat anvil is ideal for measuring sheet metal thickness, while the blade anvil can be used for narrow grooves and the spherical anvil for curved surfaces.

How do I maintain accuracy?

Keep the measuring faces clean, avoid dropping the tool, and periodically check calibration using the setting standard. Recalibrate or adjust if readings deviate. Store in a protective case when not in use.

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