graphite end mill graphite end mill graphite end mill

Graphite 2 Flutes Long Neck Flat End Mill

SAMHO Diamond-Coated 2-Flute Long-Neck Flat End Mill — Precision Tool for Deep-Cavity Machining

Highly abrasive materials can reduce efficiency and increase costs. The SAMHO graphite Series is engineered for high-precision machining of graphite, ceramics, and other brittle non-metallic materials. With a high-adhesion diamond coating, this 2-flute long-neck square end mill delivers stable performance and extended tool life in demanding applications.

Applicable Materials
Optimized for graphite electrodes, electronic ceramics, and highly abrasive non-metallic materials.

Efficient Deep-Cavity Machining
The long-neck design reduces tool interference. It is ideal for deep cavities, narrow slots, and complex contours. It also improves machining stability.

Exceptional Durability
Made from ultra-fine-grain carbide and coated with a high-hardness, chemically inert diamond layer. This combination increases wear resistance and reduces the risk of chipping.

Precision You Can Rely On
Tolerances are controlled within ±0.01 mm. This ensures consistent results in batch production.

In high-precision material processing, tool performance directly affects both machining efficiency and product quality. The SAMHO diamond-coated 2-flute long neck flat end mill bit (D0.2–3 mm) is engineered for the toughest graphite and ceramic applications. It combines exceptional wear resistance with precise cutting performance. Its air-shaded design reduces tool friction and prevents chip clogging, allowing CNC operators to perform stable and efficient precision machining, even at high speeds.


Advanced Technical Features

High-Adhesion Diamond Coating for Extended Tool Life
Our proprietary diamond coating provides exceptional hardness and chemical inertness:

  • Wear Resistance: The cutting edge stays sharp even during prolonged, continuous dry cutting.
  • Micro-Chipping Prevention: The coating bonds securely to the carbide substrate under high-speed friction, reducing the risk of edge chipping.

Long-Neck Geometry for High-Precision Machining
The precision long-neck design allows easy access to deep cavities and complex contours, ensuring stable 3D profile machining:

  • Graphite Machining: Delivers a cleanroom-level smooth surface, ideal for intricate electrode workpieces.
  • Ceramic Machining: Achieves high-precision finishes with no tool marks.

Efficient Dual-Flute “Cool-Cutting” Design
The sharp dual-flute geometry minimizes cutting heat and optimizes chip evacuation:

  • Maximized Chip Evacuation: Quickly removes abrasive dust and debris for stable machining.
  • Reduced Cutting Load: Limits heat buildup, preventing cracks in brittle materials.

Ultra-Fine Grain Carbide Substrate with High-Precision Grinding

  • Precise Dimensional Tolerance: Controlled within ±0.01 mm for consistent batch production.
  • Superior Fracture Resistance: Improves durability, especially for highly abrasive materials.

Typical Applications

Graphite Machining: Ideal for high-precision cutting of EDM electrodes, graphite molds, and structural components.

Ceramics Machining: Suitable for electrical ceramics, zirconia, and other brittle non-metallic materials, delivering smooth, high-gloss surface finishes.

Composite Machining: Efficiently mills glass fiber- and carbon fiber-reinforced plastics, reducing cutting heat and minimizing the risk of material cracking.


Why Source Wholesale from SAMHO?

Exceptional Lifespan: High-adhesion diamond coating provides superior wear resistance and prevents micro-chipping, ensuring reliable performance in high-speed dry cutting.

Stability and Precision: Made from ultra-fine-grain carbide and manufactured to strict tolerances, delivering consistent results in batch production.

Trusted Supplier: Supported by SAMHO’s 20+ years of CNC tool R&D and manufacturing expertise, offering a dependable and professional partnership.

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

end mill

Total 30 models

Model Number Outside Diameter Length of Cut Effective Length Shank Taper Angle Overall Length Number of Flutes Shank Diameter In Stock
GRALS2-002010 0.2 0.4 1 15° 50 2 4
GRALS2-003020 0.3 0.6 2 15° 50 2 4
GRALS2-004020 0.4 0.8 2 15° 50 2 4
GRALS2-004040 0.4 0.8 4 15° 50 2 4
GRALS2-004060 0.4 0.8 6 15° 50 2 4
GRALS2-005020 0.5 1 2 15° 50 2 4
GRALS2-005040 0.5 1 4 15° 50 2 4
GRALS2-005060 0.5 1 6 15° 50 2 4
GRALS2-006020 0.6 1.2 2 15° 50 2 4
GRALS2-006040 0.6 1.2 4 15° 50 2 4
GRALS2-006060 0.6 1.2 6 15° 50 2 4
GRALS2-006080 0.6 1.2 8 15° 50 2 4
GRALS2-006100 0.6 1.2 10 15° 50 2 4
GRALS2-010040 1 2 4 15° 50 2 4
GRALS2-010060 1 2 6 15° 50 2 4
GRALS2-010080 1 2 8 15° 50 2 4
GRALS2-010100 1 2 10 15° 50 2 4
GRALS2-010160 1 2 16 15° 50 2 4
GRALS2-010210 1 2 21 15° 55 2 4
GRALS2-015060 1.5 3 6 15° 50 2 4
GRALS2-015100 1.5 3 10 15° 50 2 4
GRALS2-015160 1.5 3 16 15° 50 2 4
GRALS2-015210 1.5 3 21 15° 55 2 4
GRALS2-020060 2 4 6 15° 50 2 4
GRALS2-020100 2 4 10 15° 50 2 4
GRALS2-020160 2 4 16 15° 50 2 4
GRALS2-020210 2 4 21 15° 55 2 4
GRALS2-020260 2 4 26 15° 55 2 4
GRALS2-030160 3 6 16 15° 70 2 3/4
GRALS2-030320 3 6 32 15° 80 2 3/4

Contour Milling Parameters

Work Material Graphite
(mm) Diameter (mm) Effective Length (min-1) Speed (mm/min) Feed Side Milling Ap(mm) Side Milling Ae(mm) Slotting Ap(mm) Slotting Ae(mm)
D0.2 1 32000 300 0.2 0.01 0.006
D0.3 2 32000 300 0.3 0.015 0.01
D0.4 2 32000 350 0.4 0.02 0.02
D0.4 4 32000 200 0.4 0.02 0.02
D0.4 6 32000 150 0.4 0.02 0.02
D0.5 2 32000 600 0.5 0.02 0.02
D0.5 4 32000 450 0.5 0.02 0.02
D0.5 6 32000 300 0.5 0.02 0.02
D0.6 2 32000 700 0.6 0.03 0.03
D0.6 4 32000 600 0.6 0.03 0.03
D0.6 6 32000 400 0.6 0.03 0.03
D0.6 8 26000 200 0.6 0.03 0.03
D0.6 10 24000 100 0.6 0.03 0.03
D1 4 32000 1000 1 0.05 0.05
D1 6 26000 800 1 0.05 0.05
D1 8 20000 600 1 0.05 0.05
D1 10 20000 400 1 0.05 0.05
D1 16 15000 300 1 0.05 0.05
D1 21 12000 150 1 0.05 0.05
D1.5 6 22000 1500 1.5 0.075 0.1
D1.5 10 18000 1200 1.5 0.075 0.1
D1.5 16 15000 600 1.5 0.075 0.075
D1.5 21 10000 300 1.5 0.075 0.075
D2 6 24000 1800 2 0.1 0.15
D2 10 20000 1800 2 0.1 0.15
D2 16 18000 1200 2 0.1 0.15
D2 21 15000 600 2 0.1 0.1
D2 26 12000 400 2 0.1 0.1
D3 16 22000 2000 3 0.15 0.3
D3 32 15000 1000 3 0.15 0.2

Notes:
*Use a milling machine dedicated for graphite;

*Recommend air blow for graphite.

Download 2: Graphite 2 Flutes Long Neck Flat End Mill File

Related Product

Related Post

hrc65 NPT full teeth thread mill

In the manufacturing of high-pressure fittings and precision molds, threading after heat treatment is a critical challenge. The SAMHO HRC65 Full-Tooth NPT Series is designed

Read More »
Get Your Custom Milling Tool Guide

Fill out the form below to receive SAMHO’s complete product catalog.