Product Overview
Precision-machined graphite threaded rods, bolts, and nuts are essential fasteners in high temperature furnaces and vacuum equipment. With excellent high temperature strength, low thermal expansion, and self-lubricating properties, graphite fasteners perform reliably where metal fasteners would fail at elevated temperatures. Available in various thread sizes and lengths for furnace hot zone assembly.
Key Features
- High temperature resistance up to 3000°C in inert atmosphere
- Low thermal expansion for dimensional stability
- Self-lubricating threads - no galling or seizing
- Good mechanical strength at high temperatures
- Precision threads for easy assembly and disassembly
- Available in standard and custom sizes
- Compatible with vacuum and atmosphere furnace environments
Technical Specifications
| Parameter | Unit | Value |
|---|---|---|
| Material | - | Isostatic / Molded Graphite |
| Bulk Density | g/cm³ | 1.70 - 1.85 |
| Shore Hardness | - | 60 - 75 |
| Tensile Strength | MPa | 25 - 40 |
| Thread Sizes | - | M4 - M30 |
| Max Length | mm | 500 |
| Thread Standard | - | Metric (ISO), Custom available |
| Max Working Temp | °C | 2800 (inert/vacuum) |
Applications
- Vacuum furnace hot zone assembly and mounting
- High temperature furnace fixture and support hardware
- Crystal growth furnace internal components
- Heat treatment furnace hardware
- Semiconductor processing equipment
- Sintering furnace assembly
- Any high temperature fastening application where metal fails
Why Choose Jincheng Graphite Fasteners?
We manufacture precision graphite threaded rods, bolts, nuts, and custom fasteners for furnace builders and high temperature equipment manufacturers. Our threads are precision machined for easy assembly and reliable clamping force at elevated temperatures. We offer standard metric sizes as well as fully custom fasteners to meet your specific furnace design requirements.
FAQ
Q: What is the maximum temperature graphite bolts can withstand?
A: In vacuum or inert atmosphere, graphite fasteners can withstand temperatures up to 2800-3000°C. In oxidizing atmosphere, maximum temperature is limited to about 400-500°C due to oxidation. For high temperature vacuum furnaces, graphite is the ideal fastening material.
Q: Can you produce custom thread sizes and special lengths?
A: Yes, we specialize in custom graphite fasteners. We can produce custom thread sizes, special lengths, head styles, and threaded ends according to your drawings. Our CNC machining center handles both standard and custom fastener requirements.
Q: How do graphite fasteners compare to Inconel or other high temp alloys?
A: Graphite fasteners are lighter, have lower thermal expansion, and can withstand much higher temperatures than superalloys. They are also non-wetting with many molten metals. However, graphite is brittle and has lower tensile strength than metals, so it is best suited for static clamping applications rather than high-vibration environments.
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