Super Spherotronic® HR

• The mainframe components locating the probe are made of massive stainless steel, hardened and fine ground on machine tools to the highest achievable accuracy.
• Concentricity of mainframe components to the probe is less than 1 micron (0.00004”).
• The spherometer rings  are one of the key components of the Super-Spherotronic® HR including an incredible amount of work to eliminate any possible error source.
• Each ring is delivered with a calibration certificate. The measuring accuracy is directly traceable to NIST standards.
• The supporting balls are also concentrically positioned with an extreme accuracy of less than 1 micron (0.00004“), ensuring excellent repeatability.
• To avoid any thermal and mechanical deformation, the supporting balls are made of tungsten carbide (an extremely hard metal), while the probe center is an ultra precise ruby ball.

This completely eliminates any errors introduced by metallic probe centers used in
other spherometers.