Gage Blog

Posted by on Sep 16, 2016 .

Gaging.com just returned from the 2016 IMTS in Chicago. It was great to meet with all of our suppliers and view the latest metrology products we will be able to offer to our customers.  We thought you would be interested in seeing some of our supplier's booths!  The scope of IMTS is absolutely massive and features the latest technologies from over 2400 exhibitors!

 

Posted by on Mar 21, 2016 .

The typical application for a Profilometer is to measure the surface finish of a steel machined product to a very high accuracy.  A measurement is separated into a number of cutoffs with a specified stroke length and even the most basic tester can usually measure accurately down to about 10Ra or .000010”.

 

We have dealt with hundreds (maybe more) surface finish applications over our decades of metrology experience and they can vary greatly.  We have measured non-woven fabric materials, concrete floors, pickleball paddles and many other “unusual” surfaces.

One commonly asked question is what type of profilometer do I...

If you put the search terms “Accuracy Definition” into Google you will be presented with the following result:
“the quality or state of being correct or precise”

That is true, but when looking at it from a Metrologist’s standpoint the second definition is more correct:
“The degree to which the result of a measurement, calculation, or specification conforms to the correct value or a standard.”
 
So what is wrong with the first statement?  It is the use of the word precise.  I will briefly go over the differences between Accuracy and Precision (aka Repeatability).


People assume ACCURACY is the most important...

Posted by on May 10, 2015 .

At Gaging.com LLC we do more than sell gages.  We are also Metrology fans, geeks or whatever you would like to call us.  So when we see the opportunity to perhaps provide a little clarity in our chosen field, we take it!

The reason for this blog entry is the result of a conversation I had with a customer last week.  He needed some advice with a “flatness” application due to a newly required specification from one of his customers. 

He was looking for a granite surface plate and a height gage with the intention of placing the height gage probe in contact with the part and then sliding the height gage around the surface plate to...

Posted by on Feb 09, 2015 .

BILATERAL TOLERANCE


One of the most commonly asked questions we get at Gaging.com besides “Do you have it in stock?” is “What is the accuracy of the gage?”

 

Sounds like a simple question, but there is more to it than just answering “a tenth”.  There are a few different ways manufacturers rate their gages for accuracy.  If we are talking about an electronic caliper for instance, the accepted tolerance is: (± .001”/ 6”) or (± .001” for every 6” of scale travel).  *Manufacturer’s specifications may differ.

 

Let’s take a closer look at the (± .001” for every 6” of scale) tolerance.  This is an...

Posted by on Oct 10, 2014 .

Often times a customer will simply mount his or her indicator/probe into comparator stand, set zero and start taking measurements. 

However, an improperly mounted gage can cause many issues like: Extra or uneven wear on bearing surfaces and gears - particularly if many measuring cycles are taking place daily.  Accuracy and repeatability problems are also a possibility when this occurs, which no Metrologist likes to hear!

Over clamping the indicator or probe in a stand This can be a sneaky one because you may not notice a huge performance reduction, but excessive clamping force compresses the mounting shank to the spindle of the...

When should a person choose a countersink gage over a chamfer gage? Ultimately they do the same thing: Both types of Gages utilize a plunger and special ratio indicator to measure the top diameter of a tapered/countersink bore.

But…there is more to the story.  This article will explain the basic advantages and disadvantages of both types of gages.
 

Chamfer Gage

A Chamfer Gage has a 3 blade plunger that covers a range of angles 0-90° or 90-127° through a specific range of diameters in up to 1” incrementsSee table  

GUARANTEED ACCURACY:
within ± .001" in 0°-90° models
within ± .002" in 90°-127°...

Posted by on Mar 27, 2014 .

Gaging.com - Measure Smarter visited the BIOMEDevice Boston trade show yesterday and saw some of the latest technologies for the Biomedical Industry. 

The Trimos booth was featuring the TR-Scan, a high-end laser surface finish analyzer that can measure a large variety of surfaces to the nanometer range.

Mitutoyo featured a new stand for the Surftest SJ-410 profilometer that will make repetitive measurements a breeze.  They call it the Autoset Unit.  Basically the stand can be programed with high precision to move back to a specific starting location. That function is a huge time saver for high volume, consecutive measurements

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