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Graphite CNC Machining Services

Graphite is a carbon-based engineered material known for its electrical conductivity, thermal resistance, and lightweight structure. It is ideal for high-temperature, high-load applications such as EDM electrodes, vacuum furnace parts, and semiconductor or metallurgical fixtures. Our CNC machining services deliver custom graphite components with precise tolerances and performance-ready finishes.

Material Properties & Advantages

What is Graphite?

Graphite is a crystalline form of carbon featuring a layered, hexagonal structure, giving it a unique combination of electrical conductivity, self-lubricating properties, and high-temperature resistance. It is available in various grades, including isostatically pressed, extruded, molded, and vibration-compacted types tailored to specific mechanical or thermal demands.

Key Advantages of Graphite:

High Thermal Resistance
– Performs in inert atmospheres up to 3,000°C
Electrical Conductivity
– Ideal for EDM, battery, and current-carrying parts
Excellent Chemical Resistance
–Inert to most acids and bases at ambient temperatures
High Compressive Strength
– Suitable for structural support at elevated temperatures
Good Wear Resistance
– Self-lubricating; performs in sliding or rotating systems

Graphite Specifications & Datasheets

We offer CNC machining for high-purity sintered Graphite.

Graphite

Hardness
Density
Thermal Conductivity
Electrical Resistivity

~35–50 (Shore)

1.6 – 1.9 g/cm³

~100 – 180 W/m·K

~10⁻⁴ – 10⁻³ Ω·cm

Wear Resistance
Chemical Resistance
Flexural Strength
Compressive Strength

Good

Excellent

~30 – 50 MPa

>100 MPa

Custom Graphite Material Options

Need a specific Graphite composition? We offer custom material options tailored to your project requirements. Contact us to discuss your needs.

Trusted by over 200 successful companies around the globe.

Machining Capabilities for Graphite

Challenges & Solutions
Graphite is porous and brittle, but easily machinable with carbide tools. Our strategies include:

High-Speed CNC Milling – For fine features and large cavities
Turning & Slotting – Achieves precise rotational parts and grooves
Dust Control Systems – Captures graphite particles during machining
Surface Impregnation or Coating (Optional) – To reduce porosity or enhance strength

Tolerances Achievable for Machined Graphite

Milling & Turning: ±0.05 mm
Tight Tolerance (EDM or sealing use): ±0.01 mm

Applications of Graphite

Graphite is trusted in thermal, electrical, and chemically active environments where conventional metals or ceramics would fail.
Industries Served:

Electrical Discharge Machining (EDM) – Electrodes and tooling blanks
Vacuum Furnaces – Susceptors, support plates, crucibles
Semiconductors – Boat carriers, insulation plates, heating elements
Metallurgy & Glass – Molds, casting dies, insulation panels
Battery & Energy Systems – Current collectors, bipolar plates
Surface Finishing Options for Graphite

To meet strict industry standards, we offer advanced surface treatments for Graphite parts:

Fine Sanding or Lapping

Improves mating surface finish.

Laser Marking

Permanent ID without degrading surface integrity.

Efficiency

Moving Fast, Guaranteed.

We prioritize operational efficiency to reduce costs and expedite delivery.

  • Average response time within 2 hours
  • Global delivery in a matter of days
  • 97.4% of parts shipped on time

Wide-Ranging Experience

Crafting Excellence Through Diverse Expertise

Our collaboration with diverse partners, each with unique machinery and expertise, enables us to overcome complex manufacturing challenges.

  • Over 2000 projects delivered
  • Expertise in multiple manufacturing processes
  • Expert DFM feedback

Massive Capacity

Ready to Meet Your Demands

Backed by 100+ carefully vetted, closely partnered experts, we fulfill your on-demand manufacturing needs at scale.

  • 65+ CNC Manufacturing Partners
  • 15+ Additive Manufacturing Partners
  • 20+ Surface Finishing Partners

Quality Assurance

Ensuring Perfection, Delivering Excellence

Every part we ship is meticulously inspected in our in-house lab to ensure it meets consistent design and quality standards.

  • ISO 9001:2015 Certified
  • State-of-the-art QC Equipment
  • In-depth Inspection Reports Available

Additional Ceramics We Support

In addition to Graphite, we offer precision CNC machining services for other hard technical ceramics:

Alumina (Al₂O₃)

Alumina (Al₂O₃) is a durable ceramic used for high-strength, high-temperature parts in precision industries.

Zirconia (ZrO₂)

High fracture toughness and wear resistance.

Boron Nitride (BN)

Excellent thermal conductivity and electrical insulation.

Quartz & Glass Ceramics

Used for optical and semiconductor applications.

Silicon (Si)

Essential for semiconductor wafer processing.

Looking for more ceramic machining options? Check out our Alumina (Al₂O₃) CNC Machining services.

Request a Quote for Graphite CNC Machining Today

Looking for high-precision Graphite machining? InstaVoxel delivers expert CNC machining, fast lead times, and superior quality. Contact us today to discuss your project.

Graphite FAQs

  • Is Graphite chemically resistant?
    Yes. It is stable in most chemical environments, except strong oxidizers at high temperature (e.g., oxygen above 500°C).
  • Can Graphite resist wear?
    Yes. It has good wear resistance due to its self-lubricating nature, though not suitable for abrasive contact.
  • Is Graphite easy to machine?
    Yes. It is highly machinable with carbide tools but produces fine dust and is prone to edge chipping without proper handling.
  • What is Graphite used for in CNC machining?
    Graphite is machined into EDM electrodes, furnace components, and parts for high-temperature or chemically aggressive environments.