Vitrfied-bonded grinding wheels made by vitrified bonds, such as main minerals clay, feldspar, talc, quartz etc. It can be classified as the following types based on abrasive types: brown alumina (A), white alumina (WA), single alundum (SA), chromium alumina (PA), microcrystal fused alumina (MA), black silicon carbide (C), green silicon carbide (GC), mixed abrasives etc. Grain size: F4-F1200; Degree of hardness: super soft (D) – super hard (Y); Exterior diameter: 3-1100mm; Thickness: 0.5-400Mmm; Bore diameter: 1-480mm; speed of active line: ≤80m/s. Based on different uses, this series can be classified as general purpose grinding wheels & special purpose grinding wheels; while based on different shapes & features, it can be classified as grinding wheels, whetstone, abrasive segment, grinding head etc.