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ProductsTungsten Carbide Ball Nose End Mill for Steel HRC55 - 2 Flute, Standard & Extra Long (Up to 150mm)
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Tungsten Carbide Ball Nose End Mill for Steel HRC55 - 2 Flute, Standard & Extra Long (Up to 150mm)

High-performance 2 flute ball nose end mill for 3D contouring in HRC55 steel. Available in standard and extra long overall lengths (50mm, 75mm, 100mm, 150mm). Sizes R0.5 to R6.

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2 Flute Solid Carbide Ball Nose End Mill (For Steel HRC55)

Achieve superior surface finishes on complex 3D contours with our HRC55 Ball Nose End Mill Series.
Engineered for Mold & Die applications, these cutters feature a high-performance coating and a rigid substrate suitable for machining Carbon Steel, Alloy Steel, and Pre-hardened Steel.
What sets this series apart is the wide range of Overall Lengths (OAL) available—from standard 50mm up to an impressive 150mm Extra Long—allowing you to reach deep cavities without tool extension holders.

Key Features & SEO Benefits

  • 3D Profiling Specialist: The precision-ground ball nose geometry is ideal for contouring, profiling, and finishing curved surfaces.
  • Extra Long Reach (Up to 150mm): We stock hard-to-find lengths (75mm, 100mm, 150mm), making these tools perfect for machining deep pockets in large molds.
  • AlTiN Coating: Provides high heat resistance and oxidation protection, enabling dry or wet machining of steels up to 55 HRC.
  • Reinforced Shanks: Small sizes (R0.5 - R2) feature a standardized 4mm or 6mm shank to maximize rigidity and prevent breakage during deep milling.

Applications

  • Mold Making: Finishing cores and cavities in plastic injection molds.
  • Die Casting: Machining complex shapes in tool steel.
  • General Engineering: Creating radius slots and 3D artistic parts.

Technical Specifications

Flutes: 2 Flutes Helix Angle: 30° - 35° Coating: AlTiN (Dark Grey/Black)
(Select your Radius and check available Overall Lengths)
Radius (R)
Cutter Dia (
ϕ\phi

)
Shank Dia
Length of Cut (L2)
Available Overall Lengths (L1) (Choose based on your reach needs)
R0.5
1.0 mm
4 mm
2.0 mm
50mm, 75mm, 100mm
R0.75
1.5 mm
4 mm
3.0 mm
50mm, 75mm, 100mm
R1.0
2.0 mm
4 mm
4.0 mm
50mm, 75mm, 100mm
R1.5
3.0 mm
3 / 4 mm
6.0 mm
50mm (3&4mm shank), 75mm, 100mm
R2.0
4.0 mm
4 mm
8.0 mm
50mm, 75mm, 100mm
R2.5
5.0 mm
6 mm
12.0 mm
75mm, 100mm
R3.0
6.0 mm
6 mm
12.0 mm
50mm, 75mm, 100mm, 150mm
R4.0
8.0 mm
8 mm
16.0 mm
60mm, 75mm, 100mm, 150mm
R5.0
10.0 mm
10 mm
20.0 mm
75mm, 100mm, 150mm
R6.0
12.0 mm
12 mm
24.0 mm
75mm, 100mm, 150mm

Machining Tips for Long Tools

When using Extra Long (100mm/150mm) end mills, tool deflection is the main concern.
  1. Reduce Feed Rate: Lower your feed rate by 30-50% compared to standard length tools.
  1. Light Passes: Use smaller depth of cuts (Ap/Ae) to reduce cutting pressure.
  1. Runout: Ensure your collet and spindle runout is minimal to prevent premature wear.
Contact us for technical support on deep cavity machining parameters!