Size:Outer Diameter 17mm(43/64") Diamond Mounted Point SPHERICAL CONCAVE Head Grinding Bit 17mm Grit 80 Jade Carving Tools Diamond grinding bit Spherical Concave head, Jade carving tools Head Shape: Spherical Concave Head Quantity: Only 1 Piece Outer Diameter：17mm(43/64"). Internal Diameter：15mm. Shank Diameter:6-8mm Total Length:51mm Grit:80 When you need to grind what diameter ball, please choose the same outer diameter of spherical concave head grinding bit. Such as: If you choose 20mm outer diameter of spherical concave head grinding bit, then you can grinding a 20mm outer diameter ball. Because the concave arc is not a semicircle (shallower than a semicircle) Product use: Apply to jade carving, stone carving, bone carving, glass carving etc. Especially suitable for forming and grinding spherical bead, etc. Used for sculpturing, precision grinding in precious stone, ceramic, glass, many the abrasive materials The speed of 2000-10000 r/min The Diamond grinding head can be installed on the Bench drilling machine, hand electric drill (not included here). Never use drills while machine is in hammer action. Use with water as a lubricant Note: carving must use cold water to cool the workpiece and the grinding head polishing, moment also can’t do without water We Can Provide other Size & Grit of the Diamond Mounted Point SPHERICAL CONCAVE Head.
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