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End Mill for Hardened Steel 2 Flute Long Neck Flat End Mill

SAMHO 2-Flute Long-Neck Flat-End Mill — The Ultimate Tool for Precision Machining of High-Hardness Steels

Stop letting high-hardness materials consume your time and budget. The SAMHO 2-flute long-neck flat end mill is specifically designed for high-precision CNC machining of hardened steel and high-hardness alloys. Its advanced coating technology and precise geometric design ensure stable cutting over extended periods, significantly improving production efficiency.

Applicable Materials: Hardened steels, high-hardness alloys, and wear-resistant steel components.

Ultimate Durability: The high-strength, micro-grained cemented carbide matrix, combined with a high-adhesion coating, keeps the tool sharp and durable even under high-speed cutting and high-temperature conditions.

Precision Cutting: The precision-ground shank and cutting-edge geometry guarantee consistent machining dimensions, meeting the demands of high-precision, high-volume production.

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In the field of hardened steel machining, tool requirements are extremely demanding. CNC operators need tools that deliver both precise cutting and superior wear resistance. The SAMHO coated 2-flute long neck flat end mill bit (D0.2-0.8 mm) is engineered to meet these high-intensity machining demands. It is specifically designed for CNC machining of hardened steel and high-hardness alloys, providing reliable performance and long-lasting durability.

Advanced Technical Features

High-Adhesion Coating for Ultra-Long Service Life

The SAMHO coated 2-flute long neck square end mill features a proprietary high-adhesion coating that provides exceptional hardness and chemical inertness:

  • Wear Resistance: Maintains a sharp cutting edge even during prolonged, high-intensity CNC machining of hardened steel.
  • Micro-Chipping Prevention: The coating adheres firmly to the carbide substrate, even under high-speed friction and extreme heat.

Precision Cutting-Edge Geometry for Hardened Steel

This double-flute, long-neck, flat-bottom end mill is engineered for efficient machining of complex contours and deep cavities:

  • Efficient Cutting: Sharp double flutes reduce cutting heat and improve chip evacuation.
  • Reduced Load: Minimizes heat buildup, preventing thermal cracking in hardened steel workpieces.

Ultra-Fine Grain Carbide Substrate and High-Precision Grinding

The tool is constructed with a high-strength, ultra-fine grain carbide substrate and finished with a high-precision grinding process to ensure superior performance:

  • Dimensional Accuracy: Tolerances are strictly controlled within ±0.01 mm, ensuring consistent batch production.
  • Fracture Resistance: Significantly improves tool durability, ideal for machining highly abrasive hardened steels.

High-Efficiency Double-Flute “Cold Cutting” Design

  • Maximized Chip Evacuation: Quickly clears heat and debris from the cutting zone.
  • Enhanced Machining Stability: Extends tool life and supports prolonged, high-precision CNC operations.

Target Applications & Industries

This series of 2-flute, long-neck, flat-end CNC end mills is widely applicable for:

  • Precision Machining of Hardened Steel: Designed for high-precision cutting of high-hardness steel workpieces.
  • Deep-Hole and Complex Contour Machining: Efficiently machines deep cavities, internal corners, and intricate structures.
  • Machining of High-Hardness Alloys and Wear-Resistant Materials: Provides excellent tool stability and long-term durability.
  • High-Precision Batch Processing: Ensures dimensional consistency and repeatable CNC machining results.

Why Choose SAMHO as Your Wholesale Partner?

This series of 2-flute, long-neck, flat-end CNC end mills is widely applicable for:

  • Precision Machining of Hardened Steel: Designed for high-precision cutting of high-hardness steel workpieces.
  • Deep-Hole and Complex Contour Machining: Efficiently machines deep cavities, internal corners, and intricate structures.
  • Machining of High-Hardness Alloys and Wear-Resistant Materials: Provides excellent tool stability and long-term durability.
  • High-Precision Batch Processing: Ensures dimensional consistency and repeatable CNC machining results.

Recommended Materials for Machining (Highly Recommended: ⭐️ | Recommended: ⭕️ | Suggested: ◯)

Category Work Material Grade
DIE STEEL Carbon steels (S45C/S55C)
Alloy steels (SK/SCM/SUS)
Prehardened steels (NAK/HPM)
Hardened steels (~55/~60/~70HRC) ⭐️
SPECIAL MATERIAL Aluminum alloys
Graphite
Copper
Plastics
Carbon fiber
Titanium alloys
Heat resistant alloys
Cemented carbide
Hard brittle (non-metallic) material

2 flute flat long neck end mill

Total 23 models

Model Number Outside Diameter Length Of Cut Effective Length Shank Taper Angle Overall Length Number Of Flutes Shank Diameter In Stock
SHHLS2-002005 0.2 0.3 0.5 12° 50 2 4 ○
SHHLS2-002010 0.2 0.3 1 12° 50 2 4 ○
SHHLS2-002015 0.2 0.3 1.5 12° 50 2 4 ○
SHHLS2-003010 0.3 0.5 1 12° 50 2 4 ○
SHHLS2-003015 0.3 0.5 1.5 12° 50 2 4 ○
SHHLS2-003020 0.3 0.5 2 12° 50 2 4 ○
SHHLS2-003030 0.3 0.5 3 12° 50 2 4 ○
SHHLS2-004010 0.4 0.6 1 12° 50 2 4 ○
SHHLS2-004020 0.4 0.6 2 12° 50 2 4 ○
SHHLS2-004030 0.4 0.6 3 12° 50 2 4 ○
SHHLS2-004040 0.4 0.6 4 12° 50 2 4 ○
SHHLS2-005010 0.5 0.75 1 12° 50 2 4 ○
SHHLS2-005020 0.5 0.75 2 12° 50 2 4 ○
SHHLS2-005040 0.5 0.75 4 12° 50 2 4 ○
SHHLS2-005060 0.5 0.75 6 12° 50 2 4 ○
SHHLS2-006020 0.6 0.9 2 12° 50 2 4 ○
SHHLS2-006040 0.6 0.9 4 12° 50 2 4 ○
SHHLS2-006060 0.6 0.9 6 12° 50 2 4 ○
SHHLS2-006080 0.6 0.9 8 12° 50 2 4 ○
SHHLS2-008020 0.8 1.2 2 12° 50 2 4 ○
SHHLS2-008040 0.8 1.2 4 12° 50 2 4 ○
SHHLS2-008060 0.8 1.2 6 12° 50 2 4 ○
SHHLS2-008080 0.8 1.2 8 12° 50 2 4 ○

Contour Milling Parameters

Work Material HRC48-55 hardened steel HRC56-62 hardened steel HRC63-70 hardened steel
Diameter Effective Length(mm) (min-1) Speed (mm/min) Feed (mm) Axial depth (mm) Radidl depth (min-1) Speed (mm/min) Feed (mm) Axial depth (mm) Radidl depth (min-1) Speed (mm/min) Feed (mm) Axial depth (mm) Radidl depth
0.2 0.5 30000 200 0.003 0.1 30000 160 0.003 0.08 30000 120 0.003 0.06
0.2 1 30000 150 0.003 0.1 30000 120 0.003 0.08 30000 80 0.003 0.06
0.2 1.5 30000 100 0.002 0.1 30000 80 0.002 0.08 30000 60 0.002 0.06
0.3 1 30000 300 0.003 0.15 30000 250 0.003 0.12 30000 200 0.003 0.09
0.3 1.5 30000 200 0.003 0.15 30000 160 0.003 0.12 30000 120 0.003 0.09
0.3 2 30000 150 0.003 0.15 30000 120 0.003 0.12 25000 100 0.003 0.09
0.3 3 25000 50 0.002 0.15 25000 40 0.002 0.12 25000 30 0.002 0.09
0.4 1 30000 400 0.005 0.2 30000 350 0.005 0.16 25000 300 0.005 0.12
0.4 2 30000 320 0.005 0.2 25000 280 0.005 0.16 25000 220 0.005 0.12
0.4 3 25000 360 0.004 0.2 20000 220 0.003 0.16 18000 180 0.003 0.12
0.4 4 25000 200 0.003 0.2 20000 160 0.002 0.16 18000 120 0.002 0.12
0.5 1 25000 500 0.01 0.25 23000 450 0.007 0.2 20000 400 0.005 0.15
0.5 2 25000 420 0.01 0.25 23000 380 0.007 0.2 20000 320 0.005 0.15
0.5 4 25000 280 0.005 0.25 23000 240 0.003 0.2 20000 200 0.002 0.15
0.5 6 20000 200 0.003 0.25 18000 150 0.002 0.2 16000 100 0.002 0.15
0.6 2 25000 500 0.01 0.3 23000 400 0.007 0.25 18000 350 0.005 0.18
0.6 4 25000 400 0.005 0.3 23000 300 0.003 0.25 18000 250 0.002 0.18
0.6 6 20000 300 0.002 0.3 18000 200 0.002 0.25 16000 150 0.001 0.18
0.6 8 20000 300 0.002 0.3 18000 200 0.002 0.25 16000 150 0.001 0.18
0.8 2 25000 780 0.03 0.4 23000 650 0.02 0.32 20000 550 0.012 0.24
0.8 4 25000 700 0.025 0.4 23000 600 0.015 0.32 20000 500 0.007 0.24
0.8 6 20000 550 0.02 0.4 18000 450 0.01 0.32 16000 350 0.005 0.24
0.8 8 16000 400 0.007 0.4 14000 300 0.005 0.32 12000 200 0.003 0.24

Note:

*Decrease both spindle speed and feed rate proportionally when the milling parameters exceed the machine’s maximum spindle speed;

*Recommend oil coolant for Stainless Steels and Heat Resistance Alloys;

*Recommend using a non-contact measuring device to avoid damaging the precisiontip point;

*Decrease both spindle speed and feed rate proportionally in case of chattering;

*When the material hardness is greater than HRC58 degrees, it is recommended to use air blow cooling for roughing andoil mistor air blow cooling for finishing.

Download 1: End Mill for Hardened Steel 2 Flute Long Neck Flat End Mill File
Download 2: End Mill for Hardened Steel 2 Flute Long Neck Flat End Mill File

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