Centered grinding holds a workpiece between fixed centers or in a chuck, so accuracy depends on how well the part is centered and fixtured. Centerless grinding supports the part between a grinding wheel, a regulating wheel, and a work rest blade with no fixturing at all — the part self-centers on its own diameter, which removes fixturing error and typically produces tighter, more consistent tolerances at higher throughput.
Centerless grinding routinely holds tolerances tighter than 0.0025 mm, and well-optimized setups can achieve ±0.00025 mm or hold tolerances as tight as 0.00125 mm. This precision comes from the process’s 1:1 ratio of grinding wheel movement to material removal.
Centerless grinding handles common metals (steel, stainless steel, aluminum, brass, titanium), superalloys (Inconel, Hastelloy), hard aerospace and medical alloys (MP35N, Kovar, Cobalt L605), and non-metals including ceramics, tungsten carbide, glass, and plastics like nylon and PEEK.
Centerless grinders can process 200 to 300 parts per minute depending on part size — considerably faster than centered OD grinding, which requires individual loading, centering, and fixturing for each part. Through-feed centerless grinding adds further speed by processing parts in a continuous, uninterrupted flow.
Yes — centerless grinding is purpose-built for high-volume production. Minimal loading time, no fixturing, continuous through-feed operation, and compatibility with automated bar feeders and robotic loading systems all support sustained, high-throughput runs with consistent part quality.