For precise bore measurements, handheld gages are limited as human feel impacts the readings, especially when checking bores in-machine. A more accurate solution, such as the Indicating Plug Gage, eliminates operator influence, ensuring stable readings and efficient recording of taper, ovality, size, and other crucial parameters.

You may be unfamiliar with the term “optical shaft metrology.” But you’ve no doubt experienced the advantages of this technology. Traveling by car or airplane, for example. In fact, it might surprise you to learn that anytime you’ve used a machine with an electric motor, a turbo charger, fuel injection, precision bearings, transaxles or spindles, chances are good you’ve benefited from optical shaft metrology.

The L.S. Starrett Company has introduced two new Bluetooth® enabled series of electronic digital bore gages with a range of accuracy and convenience features for increasing measurement throughput when inspecting internal hole dimensions. 

For the most productive and efficient bore gage measuring solutions, it is beneficial to take some time to examine technology options. Choosing the right gage for your application will ultimately save tens of thousands of dollars and lead to increased accuracy. To begin the selection process, it is useful to review how you collect and record measurement data.

Beginning some 30 years ago, portable surface finish gages—some small enough to fit in a shirt pocket—brought a new level of part control to the manufacturing floor.

The Hommel-Etamic Toposcan is a system used for measuring the surface of cylinder bores larger then 60mm in dia. 

These two choices for bore measurement come into play when close tolerances are the order of the day and speedy, repeatable measurements are required in a production environment. Keeping these requirements in mind, instrument makers usually offer options such as hard chromed bodies or carbide pads and contacts where needed to keep wear at a minimum.