Hole Measurement Gaging Tips
Imagine a large rotor with an ID of 12". One normally uses an adjustable bore gage, or perhaps an inside rod micrometer, to check the diameter. But in this case, a hub in the center of the part presents an obstacle.
When multiple part measurements show unacceptable variation, it is essential to understand whether it is the manufacturing process, or the measuring process that is at fault.
Do you know the amount of ovality and taper of your bores? Are you sure you want to know? The decision can mean a big difference in the gage you select and the way you use it.
Indicating bore gages come in two basic varieties: adjustable-capacity gages with interchangeable contacts or extensions; and fixed-size gages with plug-type bodies.
Maybe you're not in Texas, but suddenly you find yourself faced with a huge measurement requirement. You've been given the task of checking some large diameters…
In the world of oil drilling there are some pretty big things. It's not just the rigs anchored out in the ocean that are huge; everything that goes along with them seems to get super-sized including the need for gaging.
Measuring IDs of "deep holes" involves a few special considerations. Deep is relative, but we'll define it here as being anywhere from roughly eight inches to 30 feet.
Measuring the diameter of a hole is one of the most common measuring tasks in a production environment. And given the kind and number of tolerances for diameters, there are many different gaging techniques available to do these checks.