IMPA: 650442

Jointed Inside Micrometer (50-300mm) with Protective Plastic Case

This jointed inside micrometer is an essential precision measuring tool for marine engineers, shipbuilders, and mechanical technicians. Designed for accurate internal diameter measurements, it covers a versatile range of 50-300mm, making it suitable for a wide variety of engineering applications. The instrument features a hardened steel body and ground measuring faces for reliable, repeatable results in demanding shipboard environments.

The micrometer comes with multiple interchangeable extension rods and a measuring head, all securely housed in a sturdy plastic carrying case. Its jointed construction allows for easy assembly and adjustment, enabling measurements in deep or recessed bores. The clear sleeve and thimble markings ensure quick and accurate readings down to 0.01mm, meeting the high standards required for marine maintenance and fabrication tasks.

Whether you are performing routine engine inspections, checking bearing clearances, or verifying machining tolerances, this jointed inside micrometer delivers the durability and precision you need. The protective case ensures safe storage and transport, keeping the tool and its accessories organized and ready for use at any time.

Key Features

Technical Specifications

SpecificationDetails
Measuring Range50-300 mm (2-12 in)
Graduation0.01 mm (0.001 in)
Accuracy±0.005 mm (±0.0002 in)
MaterialHardened steel, carbide-tipped measuring faces
Included ExtensionsMultiple rods for specified range
CasePlastic carrying case
ApplicationInternal diameter measurement in marine and industrial settings

Frequently Asked Questions

What is a jointed inside micrometer used for?

A jointed inside micrometer is used to precisely measure internal diameters of bores, cylinders, and pipes. The jointed design allows for adding extension rods, making it suitable for measuring deep or hard-to-reach areas commonly found in marine engines and machinery.

How do I use this micrometer?

Select the appropriate extension rod and attach it to the micrometer head. Insert the assembly into the bore to be measured, then adjust the thimble until the measuring faces lightly contact the walls. Read the measurement from the sleeve and thimble scales for a precise internal dimension.

What accuracy can I expect?

This instrument provides graduations of 0.01mm and an accuracy of ±0.005mm, which is standard for precision inside micrometers used in marine and engineering applications.

Is this micrometer suitable for harsh marine environments?

Yes, the hardened steel construction and corrosion-resistant finish make it suitable for regular use in shipyards and onboard vessels, provided it is properly cleaned and stored in its protective case after use.

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