Royal Master has always been known as the company that builds small to medium centerless grinders with extraordinary precision. The 20x12 changes the conversation. Engineered from a clean sheet in Oakland, NJ, it is the first large-format centerless grinder built on an entirely new platform in 30 years. Not a rebuild. Not an adaptation of existing iron. A machine designed from the ground up to deliver Royal Master precision at XL scale.

The 20x12 targets customers who have been running Cincinnati centerless grinders and are ready for a modern alternative — one that matches the static stiffness and wheel geometry they are accustomed to, with all modern engineering underneath. At 1,800,000 lbs of static stiffness and a weight comparable to the Cincinnati #2, it is sized and built for the applications that have always required a bigger machine.

The machine starts with an 8" thick Starrett

granite surface plate lapped to .0002" flatness. A Timken hard-bearing headstock design delivers high rigidity under heavy loads without an outboard bearing, engineered in direct collaboration with Timken. All axis motion is servo-driven with no hydraulics — no warm-up time, no warm-up drift. Input a move of a quarter micron and the machine moves a quarter micron.

The 20x12 features dual slide upper and lower ram beds for maximum setup flexibility across infeed and thrufeed applications. 9 nanometer Heidenhain glass scales on the diameter positioning axis deliver 1/4 micron compensation increments. Standard is 7 axis of CNC with camless dressers, with an easy upgrade path to full CNC dressing on both wheels.

The platform couples with all types of automation — from high-volume step feeders to pick and place and full robotic cells. Royal Master engineering on both the machine and the automation makes for a seamlessly integrated system. Post-process gauging with machine feedback is commonly added. For customers who want the large-format capability without CNC complexity, a basic thrufeed version with handwheels for size compensation referencing digital indicators is also available.