In reality, all the calibration certificate tells you is that the tool was found to be accurate at the time of calibration. In between the time you receive it and the time the calibration was performed, the tool passed through many hands, most notably the hands of a shipping company.
It will probably be packaged well and everything will be fine. Remember many micrometers have withstood harsh machine shop environments for decades and measure as accurately as a brand new tool.
Used tools are an excellent way to save money when it comes to micrometers. This is even more true when talking about depth micrometers, if you can find the right deal. Generally, I have found prices for used tools fall into two categories; cheap and priced like new. Avoid the like new prices. There are plenty of other brands out there that put out quality tools for years.
The tricky thing is that over the years some of these manufacturers have taken a step down in quality. The older stuff is much better. A good tip when looking for used tools is to look for ones that sill have the original case or box. It is usually a sign that they were well cared for. For more info about used micrometers, see our post about the best micrometer brands to find out which ones stand the test of time and the brands you should avoid.
Carbide tips have the benefit of increased resistance to wear. The downfall is that they are more prone to chipping of the anvil face.
If you are careful with either type, it is unlikely that wear or chipped anvils will be an issue. A good case will go a long ways towards keeping your tool protected and safe. The same can be said of dirt and brake dust. Give them a good wipe down after use and keep them safely in a case or toolbox to make sure they will be in working order for years to come.
A good ratchet makes a big difference when it comes to micrometers. If the ratcheting mechanism is bad, then the tool could give bad readings. Ratchet mechanisms come in many forms. The most common types are the click style ratchet and the friction thimble. Personally, I prefer to use the click style or no ratchet over the friction thimble. Just a matter of personal preference. Some companies claim that the friction thimble, which simply spins freely once it is at the correct size, is more accurate but I have never known this to be the case.
If possible, try out both the click style ratchet and the friction thimble and determine what you prefer.
If you go with a digital micrometer, pay attention to the IP rating of the tool. The tables below show how well protected the device is from the elements. The first number is for protection from solids such as chips and dust. The second number is for protection from liquids such as oil and coolant. Both of the Mitutoyo digital micrometers recommended above are rated IP This is a very high level of protection.
The next level down that is commonly seen is a IP54 rating which would be sufficient for most environments as well. Many micrometers are capable of transferring measurement data to a computer.
If data transfer is a feature you are interested in then please pay attention to the manner in which the tools communicates and the price of any required accessories. The cost of a simple cable can often be half the cost of the micrometer itself or more. Save my name, email, and website in this browser for the next time I comment. One last tip if you are very new to micrometers. Where to Buy. Mitutoyo QuantuMike Best Overall Micrometer.
Check Price. Mitutoyo Digital Micrometer. Best Digital Micrometer. Anytime Tools " Micrometer. Best Budget Micrometer. Starrett ST Best Standard Micrometer. Mitutoyo Depth Micrometer. Best Digital Depth Micrometer. Starrett Z-6L Depth Micrometer. Best Standard Depth Micrometer. Fowler Depth Micrometer. Best Budget Depth Micrometer. Table of Contents. Check Price on Amazon. Best digital micrometer. I am just going to include a bulleted list of what makes them so good: Extremely accurate Quick to use and take measurements Battery life is long IP65 rating means they are protected from dust and splashing water Great build Excellent durability Unlike standard analog micrometers, the cheap ones are not as close in quality to the budget tools.
Best budget micrometer. Best standard micrometer. Starrett T Best depth micrometer. The beam and crossbeam of the 16ER are composed of a hardened stainless steel, which is structurally ready to keep the accuracy of your measurements time and time again. Meanwhile, the plastic components are chemical resistant to help the caliper survive tough workshop conditions.
The electrical components are protected with a sturdy IP67 rating, which is rated to survive even momentary submersion in water. The body of the device has a large LCD which is easy to read, and can be toggled between English and metric units with one button. As an added bonus, the 16ER includes a protective case and the necessary battery. Their Twin-Cal digital caliper uses the standard Vernier 6-inch build, but the body of their device is actually considerably longer to ensure you can make use of the entire six inches for measurement.
But what makes this digital caliper really stand out is its use of a TESA wireless interface, along with a wired data port. Combined, these features allow you to export data to your computer to take measurements far faster than would otherwise be humanly possible.
The body is made of stainless steel which has been coasted with PVD for durability. For the electronics sealed behind plastic housing, and is protected with IP67 waterproofing for coolants, oils, dusts, and momentary submersion. This caliper is designed with a lengthy 9.
The 1. But it does include a protective fitted plastic case, and the necessary CR battery. As the name suggests, Mitutoyo is manufactured in Japan, and is kept to the high standards of Japanese manufacturing.
In the digital caliper industry, Mitutoyo is well known as the go-to brand for reliable quality. After being hand-tested by experts, the responsible staff members personally sign a certificate of inspection to be included with each caliper they sell. And true to their reputation, it has the sturdy build a digital caliper needs to hold up under regular use. The Mitutoyo uses a simple LCD display that resembles the face of a standard calculator, which can be toggled between the imperial and metric system.
The ratchet-stop design of this device allows you to apply uniform pressure for adjusting the caliper. All the plastic components involved are resistant to oil, and the measuring faces have been tipped with carbide for durability over hundreds of measurements. The IP65 protection is rated for being dust tight, though not submersion. The device weighs a hefty Whether or not that feature will be a convenience or an annoyance depends on your intended use.
Depending on how often you use it, you should find the battery will last through nearly 3 years of steady measurement. Another entry from Mahr Federal, this micrometer makes use of a spindle-and-anvil design rather than more standard Vernier Caliper build. The spindle and anvil are both made to last thanks to being carbide tipped to hold up under constant use. And the spinner ratchet has been smoothly integrated into the thimble of the device for easy use. Mechanical outside micrometers measure outer dimensions in 1" increments to 0.
Electronic outside micrometers measure outer dimensions in 1" increments to 0. Micrometer sets measure outer dimensions in 1" increments to 0.
Electronic and Mechanical inside micrometers measure internal dimensions like internal diameters in 1" increments to 0. Electronic and Mechanical depth micrometers measure parts with depth features like internal notches in 1" increments to 0. Electronic and Mechanical micrometer heads are used in fixtures like locating small stages to ease reproducibility. They can measure various dimensions depending on the fixture design …. Micrometer standards are fixed gages, with a fixed dimension, used to perform a basic field checks on micrometers and other linear precision measuring tools.
Electronic and Mechanical special function micrometers have the same fundamental characteristics of a typical micrometer. What makes them special are the unique body types, spindle….
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