To maintain accuracy at the point of contact we recommend that you:
Choose short styli
The more that a stylus bends or deflects, the lower the accuracy.
Use as short as possible stylus is your best option.
Every time you join styli and extensions, you introduce potential bending and deflection points. Try, wherever possible, to reduce the number of components in your application.
Choose the ball as large as possible
1. it maximises your ball/stem clearance thereby reducing the chances for false triggers caused by ' shanking out on the stylus stem
2. the larger ball can reduce the effect of the surface finish of the component being inspected.