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Harmonic Analysis
Holes and cylinders are the most commonly produced forms in the modern machine shop. Usually, the diameter is the critical dimension to be measured, but when a part needs to interact with other parts, form and surface finish must also be taken into account.
Read MoreFinding Common Ground For Measurement Disagreement
When we think about making a simple measurement such as an outside diameter, many methods can be used. These would include calipers, micrometers, mechanical snap gages, air snaps, CMMs and special fixture gages, just to mention a few.
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The Value Of Conserving Measuring Range
Many people confuse the act of measuring a part with that of gaging a part. Although both operations are similar, understanding the subtle differences between the two can improve the accuracy and efficiency of both processes.
Read MoreWhy A Negative MPE May Be Very Positive
Specifications for metrology equipment are usually published in nice glossy brochures that have lots of great pictures highlighting all the features of the product. But specifications can be confusing and are often a hot topic of debate.
Read MoreGetting The Most From Your Portable Surface Gage
Portable surface gages have come a long way in the past 25 years. Instruments that once encompassed three separate pieces, took a hand cart to move and cost tens of thousands of dollars can now be carried in the palm of your hand.
Read MoreMasters For Comparative Gages
Most masters used for setting comparative gages look like everyday gage blocks, master rings or discs. However, ASME standards for these masters are very specific in defining their characteristics, including material, physical sizes and geometric conditions.
Read MoreThings You Should Know About Digital Height Gages
With its long range of motion, the digital height gage can be thought of as a giant caliper, but one with the accuracy of a sophisticated benchtop gaging system. These versatile digital height gages are capable of performing a range of measuring tasks quickly and reliably.
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The Right Angle On Perpendicularity
In nature, a right angle happens only by chance. But the importance of this concept—which results from the perpendicular intersection of lines or surfaces—applies to architecture, civil engineering, agriculture and manufacturing.
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Tracking Down Tracking Errors
In the world of dimensional measurement, electronic gages make up a class of instruments that are capable of detecting extremely small dimensional variations on a surface element. The gage's electronic transducer can operate in a number of different ways, typically LVDT (Linear Variable Differential Transducer) or through a digital scale-based technology.
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Locking It In With A Good Taper Fit
A machined taper fit between mating parts is a fast and secure way to put two parts together. Fast mating and good alignment make taper fits critical in two very different fields.
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Gaging Tighter Tolerances Is A Different Animal
If you are planning on manufacturing to tolerances of 0. 0001 inch or less and have not done so before, your introduction to high order gaging might be an eye opener.
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Gage Accuracy Runs Hot And Cold
“It takes a while to warm up in the morning, but after that, it runs great. ” I swear that machinists apply this statement to their gages as if the instruments were like car engines with 50-weight motor oil and cold-intake manifolds.
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