When tolerances become tighter and size becomes more critical, it becomes more important to understand the general requirements of straightness or concentricity. To illustrate this, suppose a 4 in.

Mahr Federal Inc. has developed a portable measurement gage that the company says can be used to determine roundness, flatness, concentricity and axial run-out on the shop floor. Mahr Federal Inc. has ...

and roundness and concentricity. Today, over 500 automobile and supplier companies worldwide employ Adcole computerized inspection gages for quality control checks on camshafts and crankshafts.