... density ≥7.5g/cm3 Usage:1. Blast cleaning 2.Rust removal 3. Shot peening 4. Sand blasting 5. Pre-treatment 6 ... suited for cleaning oxide skin, pre-treatment of surface or reinforcement.(3) ≥60HRC:High hardness, sharp edges remain during operation, mainly used for ... size , good abrasion resistance,more sharp for cutting, cut fast, and make the marble with a more smooth surface. Comparison for bearing ...