End Styli Wear and Build-Up Forever with Diamond Styli

Q-Mark is pleased to offer precision diamond styli in nearly any 
standard thread size and configuration. Diamond styli are an excellent choice for demanding applications. Diamond sphere performance is unmatched when measuring hard, abrasive, or very soft surfaces.

Unlike ruby spheres, no substance sticks to diamond spheres, not even the softest aluminum alloys. Diamond spheres retain their high-precision spherical form at all times, thereby preventing additional measuring uncertainties. This saves you time and money because checking, cleaning, and recalibration are theoretically eliminated.

Diamond is the hardest known natural material on earth. 
Pure diamonds can only be scratched by other diamonds. Diamonds resist breaking under impact and are impervious to strong acids, bases, and chemical solvents. These beneficial properties ensure that your diamond styli will retain their high-quality spherical form indefinitely. There's no need to inspect them for wear. 

Another advantage of diamond spheres is their high Grade 5 (less than 150 nm) sphericity. They're available in more sizes, and they cost less than solid diamonds.

Solid Diamond spheres should be used when probing hard or abrasive surfaces. The diamond tip will not wear, even when used with high probing or scanning forces. Solid diamond spheres are ground and polished to Grade 10 sphericity (less than 250 nm).