Glass crystal balls require various processes such as raw material cutting, polishing, and polishing before being made into finished products. Efficient production relies on the correct use of diamond tools. The ultra large diameter diamond grinding disc can perform rough and fine grinding on glass balls, greatly reducing the time required for polishing to the final product. The diameter of the diamond grinding disc can be customized from 200~800mm, and the particle size can be customized from 300 #, 400 # to 1000 #.