DT-DIATOOL Diamond Beveling Chamfer Bit 30mm with 5/8"-11 Thread for Tile Porcelain Ceramic Granite Marble Existing Holes Enlarging Polishing Shaping Trimming Repairing

SPECIFICATIONS: Diameter 30mm: Total Length 40mm; Usable Length 30mm; Thread 1.6cm; Grit #80; Top Angle 53 Degrees Not suitable for drilling holes, but designed to enlarge, shape, polish, clean, cut, finish, round or bevel existing rough holes of granite ceramic marble porcelain tiles. Recommended machine: 1.5 cm shaft angle ginder. Recommended rotation speed: 6000. Max RPM: 11000 If you need to mount it on a hand drill, please purchase the adapter separately or choose our hex shank diamond chamfer drill bit directly. Please note that if you use it on a hand drill, please do not use the hammer mode and keep the drilling speed above 2000rpm. Dry or wet use. For dry use, please bring your protective gear to protect your eyes and mouth from dust. Wet use is less dusty, more conducive to heat dissipation, and can extend the life of the wet product. Vacuum brazing technology keeps 80 grit diamonds more exposed for a better working effect.