PTFE Tube
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PTFE Hollow Bar: Premium Stock in Molded & Extruded Grades
PTFE Hollow Bar (also widely known as heavy-wall PTFE tubing) is the industry standard for high-performance machining blanks. Designed specifically for manufacturers who turn and mill precision components, our hollow bars provide a near-net shape that minimizes material waste. We supply these bars in two distinct manufacturing formats—Molded and Extruded—ensuring you have the right material structure for your specific application.
Choosing the Right PTFE Hollow Bar: Molded vs. Extruded
To ensure the best performance for your final parts, it is essential to select the correct production process:
Molded PTFE Hollow Bar:
Produced via hydraulic compression, these bars are ideal for large-diameter components and custom wall thicknesses. They feature the highest molecular density and are the preferred choice for heavy-duty seals and large bushings.
Extruded PTFE Hollow Bar:
Manufactured through a continuous ram extrusion process, these bars are perfect for high-volume production of small to medium-sized parts. They offer excellent consistency in OD/ID dimensions and can be supplied in longer, continuous lengths.
Molded PTFE Tube (Inner Diameter 7 - 300mm) >>
Extruded PTFE Tube (Inner Diameter Φ0.5-24mm) >>
Technical Comparison & Capabilities
| Feature | Molded Hollow Bar | Extruded Hollow Bar |
| Manufacturing Method | Compression Molding | Ram Extrusion |
| Standard Lengths | 90 mm - 300 mm | 1-200m / Continuous |
| Internal Stress | Very Low (Slow-Cooled) | Standard |
| Density Range | 2.1 - 2.3 g/cm³ | 2.1 - 2.3 g/cm³ |
| Customization | High (Custom Wall Thickness) | Standard Sizes |
Regardless of the production method, every PTFE Hollow Bar we ship is treated as a machining blank. This means:
- Machining Allowances: We provide sufficient "cleanup" material on all surfaces, ensuring you can achieve your final blueprint dimensions with ease.
- Material Purity: We use 100% virgin PTFE resin (or reinforced filled grades) to ensure that during CNC turning, the material remains free of voids and impurities.
- Dimensional Stability: Our controlled sintering and cooling cycles ensure that the hollow bars remain straight and stable during high-speed cutting.
Industrial Applications: From Raw Bar to Precision Part
Our customers utilize PTFE Hollow Bar to manufacture a wide variety of critical components, including:
- Heavy-Duty Bushings: For chemical pumps and agitation systems.
- Valve Seats & Seals: High-performance sealing for corrosive fluid handling.
- Insulating Spacers: For high-voltage electrical and aerospace engineering.
- Custom Gaskets: Precision-cut rings for high-temperature autoclaves.
FAQ - Frequently Asked Questions
Q: Can you provide PTFE Hollow Bar in filled grades?
A: Yes. Both our molded and extruded bars can be reinforced with fillers like Bronze, Glass Fiber, Carbon, or Graphite to enhance wear resistance.
Q: What is the benefit of using Hollow Bar instead of solid rod?
A: Using a PTFE Hollow Bar reduces the amount of material you need to remove (drilling/boring), which significantly lowers your material costs and machining time.
