Machining Methods

Why is a micrometer an essential tool for making quality parts?

Why is a micrometer an essential tool for making quality parts?Why is a micrometer an essential tool for making quality parts?

What is a micrometer?

A micrometer is a sensitive tool for accurate measurement of length dimensions. This is one of the most important measuring instruments to date.

It has a rigid C-shaped frame. There is a fixed anvil on one side and a movable spindle on the other side. The feature to be measured is placed between these two and the thimble is rotated to close the spindle. Markings on the sleeves and thimbles, called vernier scales, show the exact physical dimensions of the feature.
Is a micrometer an alternative to digital measurement?

Micrometer and other analog devices have been added to modern digital laser and optical measurement systems, but are not a replacement for them. Each is in a modern factory and, when used properly, their relative strength can reinforce each other.

Since it is not practical to install a 3D laser scanner on every workstation when creating a new rapid prototype or manufacturing part, a good machinist will ensure that the proper measurement method is used to confirm the quality of work. Must be established. That’s where the micrometer comes in.
How do you read the micrometer?

The digital display helps confirm the reading on the vernier scale.

They can be adjusted in many ways, but most machinists measure at microns, or 1/1000 millimeters. At the micrometer above, each thimble line represents 10 microns, or 1 / 10,000 millimeter. The larger hash line on the sleeve represents half a millimeter, or 500 microns.

What is the proper way to use a micrometer?

Machinists need to learn more than just how to read a micrometer calibration correctly. For proper use, you must also learn to hold the part carefully, making sure that the features measured between the spindle and the anvil are aligned correctly with the frame of the tool.

This is easy to do on a perfectly square flat surface. Variant geometry makes it more difficult. Machinists need to know the best way to use this equipment, as micrometer cannot be used on some slopes.

How much pressure should be applied to the measurement?

Another skill that machinists have to master is knowing how much pressure is applied between the anvil and the spindle. The ideal is to take up slack and empty space for accurate measurements. However, if the pressure is too high, thin parts can bend or deform. This can also damage precision equipment.

Some micrometer has a ratchet as part of the thimble. This allows the user to set some tension on the thimble to read at a consistent pressure from one measurement to the next.

Why is this important for training skilled machinists?

Making accurate analog measurements is important for achieving accuracy. Remember that accuracy and accuracy are related but not the same. Accuracy requires consistency, so we train our operators in best practices to achieve consistent results. Proper use of micrometer ensures component quality, saves costs, avoids waste and redo, builds careful work habits, and enhances analytical and spatial reasoning needed by good engineers. To do. That’s why at Stars we teach all machinists how to use micrometer correctly.

How does this help improve the quality of your parts?

It is not practical to make 3D optical measurements of all parts at every stage of manufacturing, so it is necessary for our technicians to constantly check and confirm the quality of work. Micrometer is invaluable in discovering potential errors before a part reaches final quality inspection. This gives you confidence in the quality of the finished part when uploading your CAD file for a free quote.