Diatest - Replacement NEEDLES - for Split Ball Probes
Precision ground 62-64 HRC steel needles, with lapped taper, also available in solid carbide for .0375" diameter probes and larger.
The lapped taper of the needle transfers the spreading movement of the split ball probe in a 1:1 ratio with the indicator
Each Inner knife edge of split ball makes single point contact with accurately ground cone, transferring gauging motion through the needle to the indicator