Niqua® Tungsten Carbide Drills Set "58MD"

Drill clean pilot holes in tough precious metals, pierce hard alloy plates, and machine refractory materials without bit flex, wandering, or premature dulling. Manufactured to exacting standards for NIQUA, the NIQUA® SUPER Q® "58MD" Tungsten Carbide Twist Drill Set (Item Number: 03 239 000) is an essential 10-piece micro-drilling system engineered for professional goldsmiths, diamond setters, horologists, and precision metalworkers. 

Constructed from premium ultra-fine micro-grain tungsten carbide, these twist drills offer superior hardness, torsional rigidity, and thermal wear resistance compared to standard tool steel drills. While conventional drill bits can dull or drift when encountering work-hardened platinum, titanium, or hard white gold, the 58MD series penetrates cleanly across ductile precious metals, stainless steel, ceramics, glass, and hard alloys without binding. Each drill features an optimized two-flute helical geometry and precision-split centering lips that evacuate chips continuously while maintaining true concentricity. Engineered on an industry-standard reinforced 2.35 mm (3/32") shank, every bit fits directly into jeweler flex shaft handpieces, precision bench micromotors, and quick-change chucks without requiring delicate micro-collet adapters. The set spans 10 calibrated sizes from 0.50 mm to 1.40 mm (ISO 005 to ISO 014), neatly housed in a benchtop indexing case for organized storage and quick identification. 

Why Choose the NIQUA® SUPER Q® 58MD Carbide Drill Set

• Solid Tungsten Carbide Construction: Delivers high wear resistance and edge retention, outlasting standard steel twist drills across repetitive drilling cycles in abrasive and dense metals. 

• Broad Multi-Material Versatility: Engineered to drill through gold, silver, brass, platinum, stainless steel, titanium, glass, and ceramics. 

• True Concentric Stability: Precision-ground 2.35 mm mounting shanks minimize radial runout, eliminating bit walking and chatter marks on mirror-polished surfaces. 

• Optimized Helical Flute Architecture: Deep spiral flutes lift micro-shavings away from the cutting tip, preventing chip packing, localized friction, and hole galling. 

• Reinforced 2.35 mm (3/32") Shank: Provides structural stiffness and direct compatibility with quick-change jewelry handpieces without changing chuck collets.

• Comprehensive 10-Piece Micro Range: Covers the most critical bench diameters from 0.50 mm to 1.40 mm for micro-pavé layouts, saw-piercing entries, and rivet channels. 

• Protective Benchtop Indexing Case: Keeps delicate micro-drill cutting tips separated, clean, and organized by ISO size.