M3 XXT, L-styli straight, tungsten carbide sphere, tungsten carbide shaft
With L styli, by default the stylus tip is at a 90° angle to the stylus shaft. Due to their L shape, the styli are particularly well-suited for measuring undercuts in bores. Furthermore, an L stylus can also be used to measure difficult-to-reach points (e.g. on the underside of the workpiece).
Tungsten carbide is the most common shaft material, it combines a very good stiffness with an acceptable thermal expansion. Only the weight can have a negative effect when using large styli. The straight shaft is the simplest stylus design and the one with the longest usable length. The full shaft length can be used as measuring length. Tungsten carbide shafts represent a good combination in terms of weight, rigidity and thermal expansion.
Tungsten carbide spheres are manufactured using a special grinding process, which theoretically enables the generation of any desired diameter. Hard metal is significantly heavier than other stylus materials, therefore the hard metal version is not recommended for large diameters. Also the accuracy of tungsten carbide spheres is significantly worse than othe materials