A few simple rules can be applied to maximize the accuracy for most probing applications.
A = ball diameter
B – Overall Length
Renishaw uses a standard description of overall length, measured from the rear mounting face of the stylus to the center of the ball.
C = stem diameter
D – Effective Working Length (EWL)
This is measured from the center of the ball to the point at which the stem will contact the feature when measuring ‘normal’ to the part.