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ProductsLong Neck Micro Ball Nose End Mill for Steel - 2 Flute, Deep Reach Rib Cutter
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Long Neck Micro Ball Nose End Mill for Steel - 2 Flute, Deep Reach Rib Cutter

High-precision long neck ball nose end mill (Rib Cutter) for machining deep 3D contours in steel (HRC55). Features relieved shank with effective lengths from 1mm to 30mm. R0.15 - R1.5.

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Long Neck Tungsten Carbide Micro Ball Nose End Mill (For Steel)

Master the art of deep 3D contouring and precision rib processing with our Long Neck Micro Ball Nose End Mills.
Designed specifically for Mold & Die applications, this series combines a micro ball nose geometry with a relieved shank (Long Neck), allowing the cutter to machine deep cavities and complex corners in Steel (up to HRC55) without wall interference.

Key Features & SEO Benefits

  • Deep Reach (Rib Processing): The reduced shank diameter (neck) allows for milling deep slots and cavities where standard end mills would rub against the workpiece.
  • High Precision Ball Nose: Perfect for 3D profiling, finishing curved surfaces, and cleaning tight corners in plastic injection molds.
  • Premium Coating for Steel: Coated with advanced AlTiN / TiSiN to withstand high temperatures when machining Carbon Steel, Alloy Steel, and Pre-hardened Steel.
  • Vibration Control: The 2-flute design and rigid 4mm shank (standard across all sizes) minimize chatter, ensuring a superior surface finish even at long overhangs.
  • Wide Range of Specifications: Available from ultra-fine R0.15 to R1.5, with effective cutting lengths tailored for various depth requirements.

Applications

  • Plastic Injection Molds: Finishing deep cores and cavities.
  • Rib Processing: Machining thin, deep structural ribs in molds.
  • Corner Cleaning: Reaching tight corners left by larger roughing tools.

Technical Specifications

Shank Diameter (D2): 4.0mm (Standard h6) Flute Count: 2 Flutes Helix Angle: 30° - 35°
(Find your required Radius (R) and select the matching Effective Length L1)
Ball Radius (R)
Cutter Dia (
ϕ\phi

)
Length of Cut (L2)
Available Effective Cutting Lengths (L1) (Select the depth you need to reach)
Overall Length (L)
R0.15
0.3 mm
0.6 mm
1.0, 1.5, 2.0, 2.5, 3.0, 4.0 mm
50 mm
R0.2
0.4 mm
0.8 mm
1.5, 2.0, 3.0, 4.0, 5.0, 6.0 mm
50 mm
R0.25
0.5 mm
1.0 mm
1.5, 2.0, 3.0, 4.0, 5.0, 6.0, 8.0 mm
50 mm
R0.3
0.6 mm
1.2 mm
2, 3, 4, 5, 6, 8, 10, 12 mm
50 mm
R0.4
0.8 mm
1.6 mm
2, 3, 4, 5, 6, 8, 10, 12 mm
50 mm
R0.5
1.0 mm
2.0 mm
3, 4, 5, 6, 8, 10, 12, 14, 15, 16, 18, 20, 22, 25, 30 mm
50 mm
R0.6
1.2 mm
2.4 mm
4, 6, 8, 10, 12, 14, 16, 18, 20 mm
50 mm
R0.75
1.5 mm
3.0 mm
4, 5, 6, 8, 10, 12, 14, 15, 16, 18, 20, 22, 25, 30 mm
50 mm
R1.0
2.0 mm
4.0 mm
6, 8, 10, 12, 14, 15, 16, 18, 20, 22, 25, 30 mm
50 mm
R1.5
3.0 mm
6.0 mm
8, 10, 12, 14, 15, 16, 18, 20, 22, 25, 30 mm
50 mm

Tips for Deep Rib Milling

To prevent tool breakage when using long-reach tools:
  1. Runout: Ensure T.I.R. is within 0.005mm.
  1. Step-down: Use smaller step-downs (Ap) compared to standard length end mills.
  1. Coolant: Air blow or oil mist is recommended to clear chips from deep cavities.
Need a specific effective length not listed? Contact us for custom tool grinding!