When deciding to open a car garage, there are certain details you’ll need to consider, such as the tools and appliances you’ll need. Among them is the micrometer – one of the most crucial car tools. Why? Because this tool helps accurately measure small parts or diameters that would otherwise be impossible to assess.
Never seen this tool, or not sure what it’s for? Then keep reading!
What is a micrometer?
Micrometer are highly accurate measuring instruments used to measure the dimensions of small parts, such as their thickness or diameter.
A micrometre consists of a rod graduated to measure to the thousandth of a millimetre, or micrometre (unit of measurement), and a fine thread that allows you to adjust the distance between the tips.
What are micrometer used for?
Micrometer are commonly used in industrial and laboratory applications to measure small parts, specifically internal and external diameters, thickness, distances, and other precise dimensions.
This is an important tool to ensure the quality and accuracy of parts manufactured in various industries, including those employed to produce machinery, scientific instruments, and automotive parts, among others.
Where car garages are concerned, these instruments allow for work processes to be improved – when used along with power tools – such as measuring internal engine parts.
Micrometer – A unit of measurement
A micrometre, as a unit of measurement, is a unit of length in the International System of Units (SI), the symbol of which is µm, which is defined as 1 millionth of a metre (1 × 10-6 m), that is, equivalent to a thousandth of a millimetre.
What types of micrometers are there?
There are currently several types of micrometres on the market, each with its own characteristics and applications, the most common of which are:
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Outside micrometer
Outside micrometres measure the outer diameter of a part, such as the diameter of a wire or pipe.
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Inside micrometer
Inside micrometres measure the internal diameter of a part, such as the diameter of a thread or hole.
Other types of instruments include depth micrometres, which measure the depth of a slot or hole, and contact micrometres, which measure the thickness or width of a part by coming into contact with its edges.
Although these are the most common, other micrometres with other types of sensors or devices, such as pointers or force sensors, provide accurate measurements for specific applications.
How do you read a micrometer?
Micrometer readings can be done as follows:
- Main scale: the micrometre sleeve features a graduated scale in millimetres or thousandths of a millimetre (0.01 mm). Each marking represents a unit of measurement;
- Ruler scale: the ruler scale is placed parallel to the sleeve, graduated in micrometres (0.001 mm). You’ll find it at the top or bottom of the sleeve;
- Pointer: a pointer or reference line indicates the current measurement on the ruler scale.
To read the measurement, you’ll need to combine the reading of the main scale with the reading of the ruler scale. For example, if the Pointer is pointing to “25” on the main scale and “5” on the ruler scale, the measurement is 25.005 mm.
In the case of instruments with a digital scale, you can see the reading directly on the screen.
How do you measure using a micrometer?
To perform a micrometre reading correctly, make sure you follow these steps:
- Preparation: make sure your device is calibrated and clean before using it. Also make sure that the surface of the part to be measured is clean and free of particles;
- Open the jaws: turn the lever or knob to open the micrometre jaws. Place the part to be measured between the jaws;
- Adjust the jaws: use the lever or button to close the jaws around the part. Adjust the position of the jaws so that the part is secure but unmarked;
- Measurement reading: look at the graduated scale on the micrometre rod and read the measurement at the nearest graduation. The size can be read in millimetres or micrometres;
- Repeat: repeat the entire process and write down your measurements for future reference.
Once you have finished taking the reading, do not forget to store the instrument in your toolbox to prevent it from getting damaged and becoming ineffective.
Which micrometer are available in the KROFtools catalogue?
The KROFtoolss catalogue contains the following outside micrometres for your car garage:
0-25mm Outside micrometer
This device has:
- One calibration adjusting wrench;
- Micrometre with metric readings;
- Carbide measuring faces;
- Graduation: 0.01 mm.
Click on the image to find out more about our 0-25mm outside micrometre. (Ref.1320).
25-50mm Outside micrometer
This apparatus has an aperture diameter of 25-50mm and a graduation of 0.01 mm.
Click on the image to find out more about our 25-50mm outside micrometre. (Ref.1325).
How much does a micrometer cost?
The price of a micrometer can vary greatly depending on the type of micrometer it is, its brand, and accuracy. Some basic models can cost 30 euros, while more precise, specialised micrometres can cost over 350 euros.
Accuracy and high-quality construction are essential characteristics to consider when choosing a micrometre, as these factors directly influence the accuracy of measurements.
It is important to choose a device that is suitable for your measurement needs and is within your budget.
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