Tolerances You Can Trust. High precision cylindrical grinding is what we do - it's all we do. Our grinding solutions include Multi-Axis CNC OD/ID, Swiss-type Centerless, CNC Centerless, and Ultra-Precision Centerless.Our Thrufeed grinding commonly utilizes materials such as plastic (HDPE, PEEK, Teflon, PVC), glass, Aluminum, and Titanium.