UPX Series 4.05-4.95mm High Precision Carbide Drill Bits with 5mm Shank ±0.005mm Tolerance

The UPX Series 5.0mm Shank High Precision Carbide Drills are developed to bridge the gap between micro drilling accuracy and medium-size hole rigidity. With a fixed shank diameter larger than the cutting diameter, these drills deliver excellent stiffness while maintaining superior hole precision.

Covering cutting diameters from 4.05mm to 4.95mm in precise 0.05mm increments and holding a tolerance of ±0.005mm, this series is optimized for precision mechanical components, mold inserts, and automotive sensor holes. The combination of ultra-fine grain solid carbide and AlTiN coating ensures outstanding performance when machining hardened steels up to 55 HRC.

• Shank Diameter: 5.0mm (fixed shank, larger than cutting diameter)

• Cutting Diameter Range: 4.05–4.95mm

• Diameter Increment: 0.05mm per size (19 sizes total)

• Diameter Tolerance: ±0.005mm

• Point Angle: 118°

• Material: Ultra-fine grain solid carbide

• Coating: AlTiN (high-temperature resistance)

• Recommended Machining: Dry or minimum lubrication

• Precision mechanical components

• Mold inserts and cavity drilling

• Automotive sensor and housing holes

• Hardened steel drilling (≤ 55 HRC)

• High-accuracy CNC machining centers

• Optimized balance between rigidity and hole accuracy

• Reduced positional error for critical insert holes

• Excellent edge stability in hardened steel machining

• Consistent performance in batch and mass production

• A staple tool series for precision machining workshops