Roundness measurement enables quality control of nominally circular and cylindrical products by testing the accuracy of their form. The component is rotated on a highly accurate spindle which provides a circular datum. During rotation, a transducer with ball tipped stylus measures radial variations of the component with respect to the spindle axis. Adding a vertical column datum and a radial arm datum, allows circular traces can be combined to give a measure of cylindricity, flatness and squareness.

Roundness Profile

• Roundness
• Straightness
• Cylindricity
• Parallelism
• Flatness
• Squareness
• Run-out
• Concentricity
• Coaxiality
• Harmonics
• Spindle Limit of Error + / - 10 nm
• Data Points / Revolution 18,000
• Column Data Spacing: Up to 200,000 Points
• Gauge Range: + / - 1mm Max
• Z Resolution: 1.2 nm - 30nm

Cylinder Plot

• Cylinder Liners
• Crankshafts
• Pistons
• Gears and Gear-shafts
• Brake Discs and drums
• ABS Parts.
• Inner and Outer Raceways
• Spherical Elements
• Rollers and Taper
• Orthopaedic Implants
• Hip Joints Balls and Taper Stems
• Blood Pump Rotating Parts
• Pill Punches and Dies.

Parallelism Plot