Product Overview

The SGS51049 from Kyocera is a precision micro solid carbide drill engineered for high-performance CNC machining operations. Featuring a 1.854 mm (0.0730") diameter with SGS grade carbide substrate, this drill 2fl micro-tool delivers exceptional dimensional accuracy, superior surface finish, and extended tool life in demanding production environments. The optimized 2-flute design with micro-polished edges ensures efficient chip evacuation and reduced cutting forces, making it ideal for precision drilling in electronics, medical devices, aerospace components, and micro-machining applications.

ISO Designation Breakdown

Engineering Dimensions & Geometry

Grade Details - Key Grade Characteristics

Grade Comparison Matrix

Chipbreaker Profile

The SGS51049 incorporates a Narrow-flute high-rake geometry with micro-polished edge for fine chip control and minimal burr formation. The flute geometry is specifically optimized for the 1.854 mm micro-diameter range, providing:

• Controlled chip curling with reduced cutting pressure to prevent tool deflection
• Enhanced chip evacuation in micro-scale blind-hole and through-hole operations
• Minimized built-up edge (BUE) formation on ductile materials
• Stable cutting dynamics across variable engagement depths at high spindle speeds
• Reduced burr formation at hole entry and exit points

Recommended Applications & Workpiece Materials

Primary Materials: Carbon Steel, Alloy Steel, Stainless Steel, Copper Alloys, Brass, Plastics, Aluminum

Application Map by Operation

Recommended Cutting Conditions

Note: Values are starting recommendations for micro-machining. Optimize based on machine rigidity, spindle runout, and high-pressure coolant delivery. Reduce speeds by 20% for depths exceeding 3×D.

Operating Guidelines

• Run-in Period: For the first 10 holes, reduce cutting speed by 25% and feed by 15% to allow coating adaptation and verify tool alignment.
• Peck Drilling: For depths exceeding 2×D, use a peck cycle with 0.5×D depth increments and full retract every 1×D to prevent chip packing.
• Coolant Pressure: Maintain minimum 100 bar (1,500 PSI) for micro-drilling to ensure adequate chip flushing and temperature control.
• Tool Life Monitoring: Inspect flank wear every 20 holes under microscope. Maximum allowable flank wear (VBmax) = 0.05 mm for micro-drills.
• Spindle Runout: Ensure total indicated runout (TIR) ≤3 μm at tool tip. Excessive runout will cause immediate tool breakage.
• Storage: Store in original anti-static packaging at 15-25°C with <50% humidity. Handle with ESD-safe tweezers only.

Toolholder Compatibility

Recommended Holder Systems: Precision collet chucks (ER11/ER16), Mini-shrinks (HSK-E25/E32), Dedicated micro-drill holders, High-speed spindles

Packaging & Ordering Information

Catalog Meta Data

All technical data and recommendations are based on laboratory testing and field trials under controlled conditions. Actual performance may vary depending on machine condition, spindle runout, workpiece material consistency, and coolant quality. For application-specific support, contact our technical team.