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Graphite Corner Radius End Mill【4 Flutes Φ 3-12】3 Graphite Corner Radius End Mill【4 Flutes Φ 3-12】1 Graphite Corner Radius End Mill【4 Flutes Φ 3-12】2

Graphite 4 Flutes Corner Radius End Mill

High-Efficiency Graphite Machining with SAMHO 4-Flute Diamond Corner Radius End Mills (Φ3–12 mm)

Maximize your productivity in abrasive environments with the SAMHO Graphite Series. Engineered for high-speed milling of graphite and technical ceramics, these 4-flute corner radius cutters combine the extreme hardness of high-adhesion diamond coating with the structural rigidity of a multi-flute design.

Flute Configuration: 4-flute layout for increased stiffness and higher feed rates.

Edge Protection: Corner radius geometry prevents micro-chipping and extends tool life.

Verified Longevity: Field-proven tool life exceeding 18 hours in continuous dry cutting.

Precision Tolerance: CNC ground to a strict ±0.01 mm for high-accuracy mold and electrode work.

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When machining graphite electrodes or brittle ceramics, tool edge failure is the leading cause of downtime. The SAMHO 4-Flute Corner Radius Series is designed to solve this, offering a reinforced cutting edge and high-efficiency removal rates that standard 2-flute tools cannot match.

Advanced Technical Features

  • High-Adhesion Diamond Coating for Extreme Abrasion Resistance
    Graphite and ceramics are highly abrasive. Our proprietary Diamond Coating provides a chemically inert, ultra-hard barrier that:
    • Resists Abrasive Wear: Maintains sharp cutting edges for 18+ hours
    • Thermal Stability: Supports high-speed dry machining and MQL without coating delamination
  • Corner Radius Geometry for Reinforced Edges
    Unlike sharp square end mills, the Corner Radius design distributes cutting forces more evenly:
    • Enhanced Edge Strength: Minimizes stress concentration and prevents corner chipping
    • Superior Surface Finish: Ideal for precision contouring, cavity finishing, and complex 3D transitions
  • 4-Flute High-Rigidity Design
    Optimized for high-efficiency side milling and finishing:
    • Increased Stiffness: Reduces tool deflection and vibration during high-feed operations
    • Better Surface Quality: More cutting edges allow finer finishes at higher traverse speeds compared to 2-flute tools
  • Ultrafine Carbide Substrate & ±0.01 mm Tolerance
    Built on an ultrafine-grain solid carbide substrate for maximum fracture toughness. Using advanced 5-axis CNC grinding, dimensional tolerance is maintained at ±0.01 mm for repeatable high-precision results in graphite molds and ceramic structural parts

Ideal Applications

  • Graphite Electrode Machining: High-efficiency milling for EDM electrodes
  • Technical Ceramics: Machining zirconia, alumina, and electroceramics
  • Hard/Brittle Composites: Precision cutting of glass-fiber and carbon-fiber reinforced materials

Pro-Tips for Maximum Performance

  • Cooling Strategy: Best used in dry cutting with a powerful dust extraction system or MQL; immediate removal of abrasive dust prevents secondary tool wear
  • Precision Setup: Use non-contact tool setters during CNC setup to protect the diamond edge
  • Feed Rate Optimization: The 4-flute design allows higher feed rates than 2-flute tools; consult the SHGLSR 4 Milling Conditions table for optimal parameters

Why Partner with SAMHO for Wholesale?

  • Wholesale Discounts: Significant cost savings for large-scale electrode and ceramic manufacturers
  • Diverse Model Range: 42+ specialized models covering diameters from Φ3 to Φ12 mm
  • OEM Excellence: Custom radii, neck lengths, and specialized coatings available upon request
Model Number Cutting Diameter Flute Length Usable Length Radius Overall Length (OAL) Number of Flutes Shank Diameter
GRASR4-0302100-60 3 10 – R0.2 60 4 3/4
GRASR4-0302100-75 3 10 – R0.2 75 4 3/4
GRASR4-0302100-100 3 10 – R0.2 100 4 3/4
GRASR4-0305100-60 3 10 – R0.5 60 4 3/4
GRASR4-0305100-75 3 10 – R0.5 75 4 3/4
GRASR4-0305100-100 3 10 – R0.5 100 4 3/4
GRASR4-04001120-60 4 12 – R0.1 60 4 4
GRASR4-04001120-75 4 12 – R0.1 75 4 4
GRASR4-04001120-100 4 12 – R0.1 100 4 4
GRASR4-04002120-60 4 12 – R0.2 60 4 4
GRASR4-04002120-75 4 12 – R0.2 75 4 4
GRASR4-04002120-100 4 12 – R0.2 100 4 4
GRASR4-04005120-65 4 12 – R0.5 60 4 4
GRASR4-04005120-75 4 12 – R0.5 75 4 4
GRASR4-04005120-100 4 12 – R0.5 100 4 4
GRASR4-06002200-65 6 20 – R0.2 60 4 6
GRASR4-06002200-75 6 20 – R0.2 75 4 6
GRASR4-060052250-100 6 25 – R0.2 100 4 6
GRASR4-06003200-65 6 20 – R0.3 60 4 6
GRASR4-06003200-75 6 20 – R0.3 75 4 6
GRASR4-060053250-100 6 25 – R0.3 100 4 6
GRASR4-06005200-65 6 20 – R0.5 60 4 6
GRASR4-06005200-75 6 20 – R0.5 75 4 6
GRASR4-06005250-100 6 25 – R0.5 100 4 6
GRASR4-08005250-75 8 25 – R0.5 75 4 8
GRASR4-08005300-100 8 30 R0.5 100 4 8
GRASR4-08005350-150 8 35 – R0.5 150 4 8
GRASR4-08010250-75 8 30 – R1 75 4 8
GRASR4-08010300-100 8 30 – R1 100 4 8
GRASR4-08010350-150 8 35 – R1 150 4 8
GRASR4-10005250-75 10 25 – R0.5 75 4 10
GRASR4-10005300-100 10 30 – R0.5 100 4 10
GRASR4-10005400-150 10 40 – R0.5 150 4 10
GRASR4-10010250-75 10 25 – R1 75 4 10
GRASR4-10010300-100 10 30 – R1 100 4 10
GRASR4-10010400-150 10 40 – R1 150 4 10
GRASR4-12005400-100 12 40 – R0.5 100 4 12
GRASR4-12005500-150 12 50 – R0.5 150 4 12
GRASR4-12005500-180 12 50 – R0.5 180 4 12
GRASR4-12010400-100 12 40 – R1 100 4 12
GRASR4-12010500-150 12 50 – R1 150 4 12
GRASR4-12010500-180 12 50 – R1 180 4 12

 

WORK MATERIAL
Diameter (mm) Length（mm) Rough 
Speed(min-1) Feed(mm/min) Ap(mm) Ae(mm)
3 12∽24 15000∽12000 3000∽2500 0.3 1.8
3 24∽42 12000∽6000 2500∽1500 0.2 1.8
3 42∽70 6000∽4000 1500∽1000 0.15 1.8
3 12∽24 15000∽12000 3000∽2500 0.3 1.8
3 24∽42 12000∽6000 2500∽1500 0.2 1.8
3 42∽70 6000∽4000 1500∽1000 0.15 1.8
4 18∽24 14000∽12000 3000∽2500 0.3 2
4 24∽42 12000∽6000 2500∽1500 0.3 2
4 42∽70 6000∽4000 1500∽1000 0.2 2
4 18∽24 14000∽12000 3000∽2500 0.3 2
4 24∽42 12000∽6000 2500∽1500 0.3 2
4 42∽70 6000∽4000 1500∽1000 0.2 2
4 18∽24 14000∽12000 3000∽2500 0.3 2
4 24∽42 12000∽6000 2500∽1500 0.3 2
4 42∽70 6000∽4000 1500∽1000 0.2 2
6 18∽30 12000∽9000 4000∽3500 1 2.4
6 30∽42 9000∽7000 3500∽2500 1 2.4
6 42∽70 7000∽4000 25000∽1500 0.6 2.4
6 18∽30 12000∽9000 4000∽3500 1 2.4
6 30∽42 9000∽7000 3500∽2500 1 2.4
6 42∽70 7000∽4000 25000∽1500 0.6 2.4
6 18∽30 12000∽9000 4000∽3500 1.5 3.6
6 30∽42 9000∽7000 3500∽2500 1.2 3.6
6 42∽70 7000∽4000 25000∽1500 1.2 3.6
8 24∽32 10000∽8000 4000∽3500 1.8 4.8
8 32∽56 8000∽5000 3500∽2000 1.8 4.8
8 56∽110 5000∽2000 2000∽1000 1.8 4.8
8 24∽32 10000∽8000 4000∽3500 1.8 4.8
8 32∽56 8000∽5000 3500∽2000 1.8 4.8
8 56∽110 5000∽2000 2000∽1000 1.8 4.8
10 24∽40 10000∽8000 4000∽3500 2 6
10 40∽70 8000∽5000 3500∽2000 2 6
10 70∽110 5000∽2000 2000∽1000 2 6
10 24∽40 10000∽8000 4000∽3500 2 6
10 40∽70 8000∽5000 3500∽2000 2 6
10 70∽110 5000∽2000 2000∽1000 2 6
12 48∽72 7000∽5000 3500∽2500 3 8
12 72∽110 5000∽4000 2500∽1800 3 8
12 110∽150 4000∽2000 1800∽450 3 8
12 48∽72 7000∽5000 3500∽2500 3 8
12 72∽110 5000∽4000 2500∽1800 3 8
12 110∽150 4000∽2000 1800∽450 3 8
Download 1: Graphite 4 Flutes Corner Radius End Mill File
Download 2: Graphite 4 Flutes Corner Radius End Mill File

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