The Ruby CMM Stylus – A Closer Look at an Industry Standard Tool

Ruby styli are the industry standard as the ideal stylus material for a vast majority of measurement applications. Ruby (both natural and synthetic) is one of the hardest minerals known to man (second only to diamond) with inherent characteristics that make it a nearly perfect material for use as a CMM stylus. Synthetic Ruby is made from 99% pure aluminum oxide that is lab-grown into crystals (or “boules”) at 2000 °C using the Verneuil process. The boules are then cut and are typically machined very gradually into a highly spherical shape.

Ruby is extraordinarily smooth on the surface, with fantastic compressive strength and resistance to abrasion. Due to these unique attributes, we were curious to see what a Ruby stylus looks like up close. If you have ever wondered the same, check out this close up image taken with our Nikon D800.

Ruby Stylus Up Close

Learn more about CMM styli

There are a number of important factors to consider when determining which stylus is best for your needs.

We are here to help

At IIA, we are experts in all aspects of dimensional measurement because it is what we do. Our goal is to provide you with the best information for your project or purchase in the most efficient and cost-effective ways. If you have questions about choosing the right CMM stylus, CMM accessories, and fixtures, or have any other questions contact us today.