Micrometers.

What are Micrometers?

Micrometers are advanced, high-precision metrology tools designed for taking exceptionally precise measurements of an object's dimensions. A micrometer tool is instantly recognisable by its C-shaped frame, which houses all the components together.

At one end of the frame is a fixed measuring face called the anvil and on the opposite side is the movable thimble and spindle, which travels towards the anvil to measure an object. This design allows for the measurement of thickness, diameter or depth with a far greater degree of accuracy than can be achieved with other measurement instruments such as calipers.

How Micrometers Work

Micrometers operate using a calibrated screw mechanism. As the thimble is rotated, it moves a spindle towards an anvil until the object being measured is gently gripped between them. The measurement is read from a scale on the thimble sleeve and a vernier scale on the thimble, which combine to provide a highly accurate reading.

In a workshop scenario, a quality control engineer in the aerospace industry would use an outside micrometer to verify the diameter of a turbine blade to ensure it meets strict performance and safety specifications, where even a minuscule deviation could have significant consequences.

Materials Micrometers Are Made From

Our range of micrometers is built for performance and longevity, manufactured from high-grade materials to ensure consistent reliability in demanding industrial environments.

• Stainless Steel: Chosen for its exceptional durability, resistance to corrosion and thermal stability, ensuring that the tool's accuracy is maintained over time, even with frequent use.

Sizes and Types of Micrometers Available

Accu supplies a dynamic range of different types of micrometers to suit a variety of precision measurement tasks in various engineering applications. Our selection covers both digital and vernier micrometers with measurable ranges from 0mm up to 1000mm, with options for both inside and outside measurement types, delivering accurate measurements down to +/-0.005mm. Our offerings also cover imperial and metric micrometers, depending on what unit of measurement you're working with.

We stock reliable industry-leading brands such as Insize and Mitutoyo, with models offering specialised features including durable carbon-tipped jaws for abrasive surfaces, wireless data transfer for seamless integration into modern digital workflows and IP65 ratings for robust protection against dust and water ingress in challenging workshop environments.

FAQs

Q: What is a micrometer used for?

A: A micrometer is used for making extremely precise measurements of an object's dimensions, such as its diameter, thickness or depth. They are essential in fields like mechanical engineering, machining and quality control where tight tolerances are critical.

Q: How do I read off a micrometer?

A: To read a micrometer, you combine the measurements from the sleeve and the thimble. The sleeve shows the main measurement in whole millimetres and half-millimetres. The rotating thimble is marked with graduations, where each mark represents a fraction of a mm. The final measurement is the sum of the sleeve reading and the thimble reading. For a step by step guide, read our article on how to read a micrometer.

Q: What is the difference between a caliper and a micrometer?

A: The primary difference between a caliper vs micrometer is accuracy. While calipers are versatile and quick for general measurements, micrometers use a finely calibrated screw mechanism that provides significantly higher precision and resolution, making them the standard for applications demanding the utmost accuracy.

Q: What are the advantages of using a micrometer?

A: The main advantages of using a micrometer are its high accuracy and precision. The tool's design minimises user error and allows for consistent, repeatable measurements to extremely fine tolerances. This reliability is crucial for ensuring components meet design specifications, enhancing product quality and performance.

Q: Micrometer vs caliper, which is more accurate?

A: In engineering and manufacturing, where exacting tolerances are critical, calipers are generally considered to be less accurate than micrometers, making the latter the superior choice for quality control and precision machining applications.

Bespoke Micrometers Manufacture.

High precision, bespoke manufacture of Micrometers to customer specification. State of the art facilities specialising in both small batch prototyping and large scale manufacture.