55 series- HRC55 4-Flute Solid Carbide End Mill

The HN55 S4 is a professional-grade 4-flute solid carbide end mill engineered for demanding finishing, profiling, and slotting in hardened and tough metals. Available in HRC55 hardness, it combines a robust micro-grain carbide core with high-rigidity geometry and optional premium coatings for extended tool life and precision in machining applications.

Geometry & Benefits

• 4-flute design: Enhances tool rigidity and control—ideal for achieving high accuracy in finish cuts and shallow slots.

• HRC55 micro-grain carbide: Provides outstanding wear resistance and hardness, enabling durable performance in hardened steels and tool steels.

• 35° helix angle: Offers a balanced blend of smooth cutting, chip evacuation, and vibration damping—excellent for a range of complex materials.

• Multiple coating options (e.g., AlTiN, TiSiN, TiAlN): Customize tool performance—select high-temperature resistance, reduced friction, or maximum surface longevity as needed.

• Ideal for demanding machining: Built to last in high-speed, high-rigidity CNC milling environments or tough manual operations.

Typical Uses & Applications

• Finishing, light profiling, and shallow slotting in hardened steels, mould steels, carbon steels, alloy steels, and cast irons.

• Common in tool & die, automotive hard part, and precision component manufacturing—especially when achieving tight tolerances.

• Suitable for both production CNC setups and rigid manual milling, where reduced deflection is critical.

1mm - 3mm Cut length, 50mm OAL, 4mm Shank

2mm - 5mm Cut length, 50mm OAL, 4mm Shank

3mm - 8mm Cut length, 50mm OAL, 3mm Shank

4mm - 10mm Cut length, 50mm OAL, 4mm Shank

5mm - 13mm Cut length, 50mm OAL, 5mm Shank

6mm - 15mm Cut length, 50mm OAL, 6mm Shank

8mm - 20mm Cut length, 60mm OAL, 8mm Shank

10mm - 25mm Cut length, 75mm OAL, 10mm Shank

12mm - 30mm Cut length, 75mm OAL, 12mm Shank

16mm - 45mm Cut length, 100mm OAL, 16mm Shank