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Published : 09/20/2018 12:08:33

A caliper is a tool used to measure the distance between two sides of an object: you can measure, with an accuracy down to 0.01mm, everything that wouldn’t otherwise be easily measurable with any other tools,. Even if vernier and dial ones are still very common, nowadays digital calipers have become more popular: this mainly happened because they are both easier to use and far more accurate.

How to choose a caliper?

There are a thousand different models of this tool, so how do you choose the best one?

  • First of all, you have to think about the application environment: there are a lot of calipers designed to be used in contact with water and fluids, while others are perfect for dry environments.
  • Then, you have to keep in mind the accuracy you need: if you are going to make a highly professional and precise job, you need a professional digital model with a resolution between 0.005 mm and 0.001 mm. 

Each type of calipers has its merits and faults, so which one to choose it’s up to you. Here’s a brief guide on the most common types of this tool you can find on the market.

  • Vernier calipers

These are similar to a slide rule: they are completely stick shift, so they are perfect for those who don’t get confused easily when it comes to reading numbers and measures. They have no dial nor display, so reading must be calculated directly on the body (by lined increments): due to misinterpretation, they are hard to read. Still, they are sturdy and shock resistant, in addition to being less expensive than dial and digital models. 

Vernier Calipers | Mister Worker™

  • Dial calipers

This kind of calipers are relatively easy to use: they have a lined dial that shows the measurement, so that all you have to do is adding the slide measurement to have the exact and final measurement. Their cost is a little bit higher and they are less shock resistant compared to vernier ones, but they are perfect tools for those who need a professional and precise caliper without spending much.

Dial calipers | Mister Worker™

  • Digital calipers

These are the ultimate tools for those who definitely aren’t math people, but also for taking highly precise measurements. They accurately display up to 0.025mm (0.001”) and can take absolute and incremental measurements. Obviously, digital calipers are more likely to be damaged from a shock; moreover, they may lose accuracy if you work in contact with oil or dust and they are more expensive than other types. Always remember to keep batteries with you, so you don’t risk finding yourself with a dead caliper while you work.

Digital Calipers | Mister Worker™

Whatever is the model you decide to pick, remember to avoid calipers made from plastic, because they are more likely to break after just a couple of uses. You should also avoid buying tools that are not smooth when in use, because this could slow down your work.

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