The Talyrond ® roundness testers/roundness measuring instruments are the number one choice for manufacturers of precision components including bearings, fuel injectors, crankshafts and turbocharger parts and much more.

The most accurate method for determining roundness of a component is to measure the variation of radius from an accurate rotational datum using a scanning probe (one that remains in contact with the surface and collects a high-density of data points).

Apr 16, 2010 · The most accurate method for determining roundness of a component is to measure the variation of radius from an accurate rotational datum using a scanning probe (one that remains in contact with the surface and collects a high-density of data points).

• Ideal instrument for the inspection of roundness, straightness, parallelism, taper, roughness and diameter, all from a single full 3D scan • Robust, automated and easy to use

When measuring roundness the best possible means of measurement is when the stylus centre and the component centre coincide with the measuring direction. If the stylus centre does not coincide with the component centre then this is a cresting error.

Ultra high precision roundness measurement • A world leader in speed, position control and accuracy • The lowest noise floor of any instrument of its kind • Measure roundness, roughness and contour on a single instrument

Ultra high precision roundness measurement • A world leader in speed, position control and accuracy • The lowest noise floor of any instrument of its kind • Measure roundness, roughness and contour on a single instrument

When measuring roundness the best possible means of measurement is when the stylus centre and the component centre coincide with the measuring direction. If the stylus centre does not coincide with the component centre then this is a cresting error.

Taylor Hobson delivers advanced harmonic analysis software for roundness, flatness, and spiral harmonics. Harmonic analysis is vital to the production and design process for bearings.

•This diagram shows the unfiltered profile collected from our roundness measuring instrument. •In this example the profile is made up of 8th and 60th harmonics, these can be separated as follows using filters.