CNC carbon materials suitable for EDM electrodes, high-temperature jigs, conductive parts, wear-resistant self-lubricating parts, thermal field parts, seals, and special industrial functional parts.
Graphite is a carbon material part made by CNC machining, featuring high temperature resistance, good electrical conductivity, good thermal conductivity, good self-lubrication, good chemical corrosion resistance, and a low coefficient of thermal expansion. It is commonly used in electrodes, EDM electrodes, mold electrodes, high-temperature jigs, wear-resistant sliding parts, sealing rings, Graphite crucibles, thermal field parts, and special industrial functional components. Compared to metal materials, Graphite is lightweight, has good high-temperature resistance and self-lubricating properties, but its strength, toughness, and impact resistance are weaker.
By focusing on application scenarios, boundaries of advantages, and non-recommended scenarios, it helps sales, customer service, and quoting staff quickly determine whether the material meets current part requirements.
It has good high-temperature resistance, good electrical conductivity, good thermal conductivity, good self-lubrication, low coefficient of thermal expansion, good chemical corrosion resistance, light weight, suitable for EDM electrode processing, and special working conditions with high temperature and low friction.
EDM discharge electrodes, mold electrodes, Graphite jigs, high-temperature fixtures, sintering jigs, heat treatment supports, Graphite sealing rings, Graphite bearings, sliding blocks, Graphite crucibles, conductive blocks, thermal field parts, semiconductor equipment auxiliary parts, vacuum furnace parts, glass hot-bending molds, special high-temperature resistant tooling.
High-strength load-bearing parts, high-impact parts, high-toughness structural parts, high-elasticity snap-fit parts, thin-walled complex-appearance parts, long-term tension structural parts, high-precision high-strength threaded parts, high-gloss appearance parts, food direct contact parts, medical implant parts, strongly oxidized high-temperature environment parts, and structural parts requiring metal toughness.
The following parameters come from product information and material knowledge fields, used for design review, quotation communication, and preliminary judgment before material selection.
| Material positioning | CNC carbon materials suitable for EDM electrodes, high-temperature jigs, conductive parts, wear-resistant self-lubricating parts, thermal field parts, seals, and special industrial functional parts. |
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| Precision performance | CNC Graphite can achieve good machining accuracy, making it especially suitable for EDM electrodes, complex electrode profiles, and precision high-temperature tooling. Because Graphite materials are brittle, small sharp corners, thin edges, small holes, and deep grooves are prone to chipping. Actual accuracy is affected by Graphite particle size, material density, tool condition, machining path, clamping method, and edge structure. Precision electrodes and assembly surfaces should be individually controlled for tolerances, surface roughness, and edge chipping requirements. |
| Dimensional tolerances | The general dimensional tolerances of CNC machined Graphite can be evaluated as ± 0.03mm to ±0.10mm, while ordinary structural parts can be evaluated at ±0.05mm to ±0.20mm. Small electrodes, sharp corner structures, thin-walled parts, deep grooves, and large Graphite components may require loosened tolerances or anti-chipping designs depending on the structure. This value is a standard reference range and does not guarantee absolute tolerances for all structures. Key EDM electrode dimensions and assembly surfaces should be separately marked with tolerance requirements. |
| Minimum Wall Thickness | The wall thickness of ordinary CNC machined Graphite structure is recommended to be no less than 1.0mm-1.5mm. Thin-walled, sharp-angled, slender rods, and narrow bridge structures are prone to cracking or breaking, so large-area over-thin designs are not recommended. When used for electrode sharp corners, thin ribs, or deep groove structures, thickness or rounded corners should be appropriately thickened or rounded according to Graphite particle size, machining tool, and discharge losses. |
| Recommended wall thickness | For ordinary Graphite structural parts, 2.0mm-4.0mm is recommended; for high-temperature jigs, Graphite fixtures, Graphite electrode bodies, and positions bearing clamping forces, it is recommended to be at least 3.0mm; slender electrodes, thin sheet electrodes, and areas requiring transport protection should be appropriately thickened, and chamfers, rounded corners, or support structures should be added to reduce the risk of fracture. |
| Minimum aperture | CNC drilling can achieve smaller hole diameters, but Graphite small and deep holes are prone to chipped edges, rough hole walls, or dust residue. For general designs, the recommended aperture is no less than 1.0mm-1.5mm. Deep holes, threaded holes, assembly holes, and positioning holes should ensure sufficient hole margin spacing. For hole openings, chamfering is recommended to avoid edge chipping and assembly cracking. |
| Assembly clearance | For ordinary assembly, it is recommended to reserve 0.10mm-0.30mm on one side; Graphite when fitting with metal, avoid overfilling, excessive overfilling, or forced compression to prevent Graphite cracking. High-temperature assembly should consider differences in thermal expansion and changes in operating temperature. The electrode clamping position should ensure sufficient clamping area to avoid excessive local clamping force that could cause cracking. If the Graphite surface requires coating or dipping treatment, dimensional changes should be additionally considered. |
| Detailed performance | CNC Graphite suitable for machining electrode profiles, holes, grooves, steps, chamfers, curved surfaces, cavities, and ordinary structural details. Fine grain Graphite can render better details, but small sharp corners, thin edges, elongated columns, and tiny text are prone to chipping or damage. EDM electrode details should consider subsequent discharge losses and correction margins. Logos and markings can be engraved or laser-marked, but it is not recommended to design complex decorative textures in weak corners. |
| Surface effect | CNC Graphite raw surface is usually black or dark gray-black, with a matte, fine-grained, or powdery texture. After finishing, the surface can be relatively flat, but it lacks metallic luster and is not suitable for high-end appearance parts. Graphite surface is prone to getting dirty, powder, or leaving black marks, so dust prevention is important during cleaning and packaging. If surface stability needs improvement, impregnation, coating, or oxidation resistance treatments can be performed. |
Based on material characteristics and suitable product ranges, customer needs are broken down into easier application directions to determine.
EDM discharge electrodes, mold electrodes, Graphite jigs, high-temperature fixtures, sintering jigs, heat treatment supports, Graphite sealing rings, Graphite bearings, sliding blocks, Graphite crucibles, conductive blocks, thermal field parts, semiconductor equipment auxiliary parts, vacuum furnace parts, glass hot-bending molds, special high-temperature resistant tooling.
CNC carbon materials suitable for EDM electrodes, high-temperature jigs, conductive parts, wear-resistant self-lubricating parts, thermal field parts, seals, and special industrial functional parts.
CNC Graphite has distinct functional material properties, with core advantages in high temperature resistance, electrical conductivity, self-lubrication, and low thermal expansion. It is suitable for EDM electrodes, high-temperature tooling, and special sliding friction parts. Graphite materials themselves are brittle, with limited impact and bending resistance; edges, thin walls, thin rods, and sharp structures are prone to chipping or breaking. Graphite dust is generated during processing, so proper vacuum suction, protection, and cleaning are necessary.
Based on wall thickness, hole position, assembly clearance, dimensional tolerances, and material usage risks, determine in advance whether the part structure is suitable for Graphite.
Post-processing of Graphite affects appearance, dimensions, hole position, assembly clearance, and usage validation results, and should be explained in advance during quotation, DFM review, and sample confirmation stages.
Post-processing should focus on appearance display, dimensional fitting, connection assembly, and testing verification. Parts involving assembly positions need to be reserved in advance for machining, coating, and trial assembly allowances.
For common issues such as threads, snaps, strength, temperature resistance, and weather resistance, identify in advance whether the material needs to be replaced or if another processing method should be used.
When customer demand exceeds Graphite material boundaries, it is necessary to combine strength, temperature resistance, toughness, long-term stability, and mass production goals to promptly recommend alternative materials or processing technologies.
If higher strength and metal toughness are required, stainless steel, mold steel, titanium alloy, or aluminum alloy can be chosen; If higher conductivity and better mechanical strength are required, Pure CopperT2, TU2 Oxygen-Free Copper, or C18150 Chromium Zirconium Copper can be chosen; If higher wear resistance and strength are needed, Tungsten Carbide, SKD11, or ceramic can be chosen; If insulation and high-temperature resistance are required, ceramic, alumina, or silicon nitride can be chosen; If you only use ordinary fixtures, you can choose Phenolic Resin (Bakelite), FR4, Acetal (POM), or aluminum alloy.
If customers require EDM electrodes, high-temperature resistant fixtures, conductive tooling, self-lubricating sliding parts, or low-thermal expansion structures, CNC Graphite is the right choice. If customers require high-strength load-bearing, impact resistance, precision threads, or long-term tension structures, it is not recommended to prioritize Graphite; metal, ceramic, or high-performance engineering plastics should be considered. When selecting Graphite, focus on confirming Graphite grade, particle size, density, strength, conductivity, operating temperature, and processing detail requirements.
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