Graphite Rod and Electrodes for Electrical and Conductive Applications
Product Overview
Our electrical graphite rods are precision-extruded and machined cylindrical graphite components used as current conductors, electrodes, contact brushes, and heating elements in electrical applications. Graphite's combination of electrical conductivity, high-temperature stability, self-lubrication, and corrosion resistance makes it superior to copper or steel rods for many electrical and electrochemical uses. We supply solid graphite rods in diameters from 5 mm to 100 mm, cut to custom lengths, with precision-machined ends for threads, press fits, or electrical connection hardware.
Electrical graphite rods serve in a wide range of industries: as anodes in electrochemical cells, as electrodes in spark plug manufacturing, as resistance heaters in furnaces, as contacts in low-voltage switchgear, and as conductive elements in specialty electrical equipment. At Jincheng Graphite, we stock a full range of extruded graphite rods in standard diameters and lengths, and precision-machine custom rods with threaded ends, chamfers, and center holes as required. Our rods are consistently sized and dimensionally accurate for reliable electrical contact.
Key Features
- Electrical conductivity - consistent resistivity for reliable current flow
- High temperature stable - maintains conductivity at elevated temperatures
- Self-lubricating - graphite film reduces friction in moving contact applications
- Corrosion resistant - stable in electrolytes and chemical environments
- Wide diameter range - 5 mm to 100 mm solid rods
- Custom lengths - cut to your exact length requirements
- Machined ends - threads, chamfers, and center holes as needed
- Good machinability - drills, turns, and threads cleanly for custom fabrication
Technical Specifications
| Parameter | Value |
|---|---|
| Material | Extruded / isostatic graphite |
| Bulk Density | 1.60 - 1.78 g/cm³ |
| Electrical Resistivity | 8 - 15 µΩ·m |
| Flexural Strength | 20 - 40 MPa |
| Diameter Range | 5 mm - 100 mm |
| Length Range | 50 mm - 1000 mm |
| Diameter Tolerance | ±0.2 mm (ground) / ±0.5 mm (as extruded) |
| Length Tolerance | ±1 mm (cut to length) |
| Straightness | < 0.3 mm per 300 mm |
| Surface Finish | Ra 3.2 µm (machined) |
| Max Temperature | 3000°C (vacuum/inert) |
| Lead Time | 5-10 business days |
Applications
- Electrochemical anodes - graphite anodes for electrolysis and electroplating
- Resistance heating elements - graphite rod heaters in high-temperature furnaces
- Electrical contacts and brushes - conductive contacts in switchgear and motors
- Spark plug electrodes - electrode rods for spark plug manufacturing
- Glass melting electrodes - electrodes in electric glass melting furnaces
- Semiconductor wafer support - conductive rods in wafer processing equipment
Why Choose Jincheng Graphite?
- Stock diameter range - wide range of standard rod diameters available
- Consistent resistivity - batch-to-batch electrical consistency
- Precision grinding - ground rods for tight diameter tolerances
- End machining - threads, chamfers, and center holes for your assembly
- Fast delivery - standard rods ship within 3-5 business days
- Competitive pricing - factory-direct graphite rod supply
- Material selection - recommend grade based on conductivity and temperature
- Global shipping - electrical equipment manufacturers worldwide
FAQ
Q: How does graphite conductivity compare to copper?
A: Graphite has higher electrical resistance than copper (resistivity 8-15 µΩ·m vs. 0.017 µΩ·m for copper). However, graphite's advantages are high-temperature stability, corrosion resistance, and self-lubrication. For low-resistance, low-temperature applications, copper is better. For high-temperature or corrosive environments, graphite is the only practical choice.
Q: Can graphite rods be threaded?
A: Yes. Graphite machines and threads well. We can cut external or internal threads on rod ends for mounting, connection, or electrical terminal attachment. Specify thread standard (Metric, NPT, UNC/UNF) when ordering.
Q: What diameter tolerance can you hold?
A: As-extruded rods have a diameter tolerance of about ±0.5 mm. Precision-ground rods can hold ±0.1-0.2 mm. For electrical contact applications requiring exact fit, we recommend specifying ground finish.
Q: How do I choose the right graphite grade for electrical use?
A: For heating elements, use low-resistivity extruded graphite. For electrochemical anodes, use dense, fine-grain isostatic graphite that resists electrolyte erosion. For mechanical contact brushes, use a medium-grain grade with good lubrication. Tell us your application and we will recommend the optimal grade.
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