Niqua® 2C2 Tool Steel Burs Cup Bur Cone

Round delicate stone setting prongs, dome small wire rivets, and clear swarf without tool clogging or friction drag in tightly clustered settings. Manufactured in Germany to European standards, the NIQUA® SUPER Q® Series "2C2" Tapered Cup Bur (Cup Bur Cone with Chip Evacuation Slot) is an advanced rotary finishing instrument engineered for professional diamond setters, goldsmiths, and jewelry production workshops.

Distinguished from straight-walled cup burs by its conical outer profile, the Series 2C2 tapers inward toward the neck to provide enhanced line-of-sight and clearance around tightly spaced stones, pavé clusters, and deep gallery settings. Combined with an integrated lateral chip evacuation slot, an extra-deep cup chamber, and a super-thin rim profile, the 2C2 expels soft metal chips continuously during rotation. This open-slot architecture prevents clogging, galling, and heat transfer when working with soft, ductile alloys including yellow gold, silver, copper, and brass. Machined from premium hardened tool steel, the internal flutes form centered, snag-free hemispherical domes on prong tips without leaving rough edges. Mounted on a standard 2.35 mm (3/32") shank, these burs fit directly into flexible shaft handpieces, brushless bench micromotors, and quick-change bench systems. Available in calibrated diameters from 0.80 mm to 2.30 mm (Item Codes: 03 238 008 to 03 238 023), each size is packaged in a bench storage box of 6 pieces.

Why Choose NIQUA® SUPER Q® 2C2 Slotted Tapered Cup Burs

• Conical Tapered Outer Profile: The tapered cone exterior provides superior clearance around closely spaced gemstones, preventing accidental abrasion of adjacent stone facets.

• Integrated Chip Evacuation Slot: The lateral discharge window expels metal swarf away from the cutting chamber, preventing tool loading and friction welding in ductile precious metals.

• Super-Thin Cutting Rim: Ultra-narrow rim wall enables precise positioning over micro-claws in dense pavé layouts without deflecting neighbouring prongs.

• Extra-Deep Hemispherical Chamber: Accommodates taller clipped wire posts and uneven prongs, shaping uniform, rounded domes in a single pass.

• Clean, Uniform Material Removal: Precision-ground internal teeth shape symmetrical, snag-free hemispherical heads on claws and wire ends without leaving a center pip.

• Low-Vibration Concentric Operation: Precision-machined German tool steel shank minimizes radial runout, ensuring smooth running and preventing tool bounce against delicate gemstone tables.

• Hardened German Tool Steel: Delivers long service life, durable edge retention, and smooth cutting performance even under intensive workshop use.

• Universal 2.35 mm (3/32") Shank: Provides seamless compatibility across all standard flexible shafts, quick-change handpieces, and laboratory micromotors.