Measurement

Holemaking 15 Nov 2002

CMM Locks In Inspection And Productivity

This company, established more than 140 years ago, manufactures a high volume of brass padlocks annually. They are made on two large rotary transfer machines with drilling capabilities. The company is also doing reverse engineering for tooling purposes for other machines it uses in its manufacturing and assembly departments.

Inspection and Measurement 1 Nov 2002

Surface Texture From Ra to Rz

The irregularity of a machined surface is the result of the machining process, including the choice of tool; feed and speed of the tool; machine geometry; and environmental conditions. This irregularity consists of high and low spots machined into a surface by the tool bit or a grinding wheel.

Aerospace 1 Nov 2002

Tight Tolerances And Trial Runs

This contract shop is committed to difficult jobs. The shop often takes on a job without knowing how the part will be made.

Measurement 2 Oct 2002

DFGT - Double Flank Gear Testing

Functional gear testing, also known as total radial composite deviation, is a method of looking at the total effect of gear errors. This test method simulates the conditions under which a set of gears is likely to operate as a result of the gears meshing together.

Measurement 5 Sep 2002

The Three Ds Of Straightness Plugs

We have touched on different applications of air gaging: size, match gaging and form applications such as taper. In this column, we'll discuss air straightness plugs.

Measurement 1 Jul 2002

Stacking Up For Big IDs

For those medium and large parts with inside diameters greater than 4 inches, an inside micrometer is often used as the inspection tool of choice. This is especially true if the volume of parts is low and there is a large range of diameters to account for.

Inspection and Measurement 15 Jun 2002

Making Gage Management Software Work For You

Influenced by quality standards such as ISO 9000, industrial facilities recognize the need to implement increasingly better control of inspection, measuring and test equipment.

Inspection and Measurement 15 Jun 2002

CAD-Based Measuring Software Handles Large Complex Parts

Many CMMs today are outdated with respect to the needs of today's quality standards and production requirements. In most cases, the original CMM machine hardware has the built-in precision to accurately provide the ongoing sophisticated measuring demands. The problem is that the software and even most of the upgrades provided with the original machines may not be adequate.

Inspection and Measurement 1 Jun 2002

The Dial Tells It All

Dial indicators—you've seen one, you've seen them all. They are all over the shop, and as you walk around, they all look the same to you.

Measurement 19 May 2002

Say Hello to Mr. Abbé, Mr. Hooke And Mr. Hertz

Whenever you use a handtool or precision gage, you should be aware of typical pitfalls that prevent good gage performance. These include measurement errors resulting from environmental conditions (dirt and temperature), loose and/or worn gage parts, and operator misuse.