Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
Bronze Filled PTFE Semi-Finished Tube
- Material: Bronze Filled Polytetrafluoroethylene (Bronze Filled PTFE)
- Bronze Content: 40% / 60% by weight (customizable)
- Color: Brown / Bronze tone
- Structure: Sintered rigid hollow tube blank
- Temperature: -180℃ ~ 240℃ continuous
- Characteristic: Self-lubricating, low friction, anti-creep, high wear resistance
- Processing: CNC turning, precision machining
5.0
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1. Product Description
Bronze filled PTFE semi-finished tube is sintered composite tube blank compounded by PTFE matrix and bronze powder (40% / 60% bronze by weight).
This rigid semi-finished material is ready for CNC turning, milling and precision machining to produce guide rings, piston rings, sleeve bearings, thrust washers and wear-resistant sealing components.
It features ultra-low friction, self-lubrication, excellent wear resistance, high compressive strength and great thermal conductivity. Widely used in high-load, high-speed hydraulic & pneumatic systems under wide temperature range. Custom OD, ID, length and bronze filling ratio available.
This rigid semi-finished material is ready for CNC turning, milling and precision machining to produce guide rings, piston rings, sleeve bearings, thrust washers and wear-resistant sealing components.
It features ultra-low friction, self-lubrication, excellent wear resistance, high compressive strength and great thermal conductivity. Widely used in high-load, high-speed hydraulic & pneumatic systems under wide temperature range. Custom OD, ID, length and bronze filling ratio available.
2. Key Material Properties
✅ Advantages
- Self-lubricating, low coefficient of friction, effectively avoid stick-slip
- Excellent wear resistance under high pressure & reciprocating motion
- High compressive strength, low creep / cold flow
- Wide operating temperature range: -180℃ ~ +240℃
- Good resistance to most oils, fuels, hydraulic fluids and chemicals
- High thermal conductivity, quickly dissipate friction heat
- Excellent dimensional stability during continuous operation
- Suitable for dry running & boundary lubrication working conditions
❌ Limitations
- Rigid material, no rubber elasticity (Cannot be used as elastic sealing like NBR)
- Poor resistance to strong oxidizing acid (concentrated nitric acid etc.)
- Bronze filler may corrode under long-term acidic aqueous environment
- Not suitable for high voltage insulation applications
3. Manufacturing & Machining Information
Production process: PTFE powder + bronze powder mixing → compression molding → sintering → finished semi-finished tube blank
Customer processing: Direct CNC lathe turning, precision cutting; No secondary sintering required
Critical Distinction VS NBR Semi-finished Tube ✅ Bronze Filled PTFE：Rigid sintered plastic, hard, non-elastic, wear resistant, wide temperature, used for wear rings, bearings, guide rings ✅ NBR：Vulcanized elastic rubber, soft, resilient, oil resistant, used for oil seals, rubber gaskets
4. Typical Applications
- Hydraulic cylinder: guide rings, wear rings, piston rings
- Pneumatic equipment: sliding bushings, thrust washers
- Transmission & gearbox: sleeve bearings, anti-wear gaskets
- Construction machinery, injection molding machine sealing assemblies
- Rotary & reciprocating motion components requiring self-lubrication
- High temperature & high load industrial equipment
5. FAQ
Q1: What bronze filling grades are available?
A: Standard 40% bronze filled PTFE; 60% bronze grade for higher load and better thermal conductivity.
A: Standard 40% bronze filled PTFE; 60% bronze grade for higher load and better thermal conductivity.
Q2: Is bronze filled PTFE elastic like NBR rubber?
A: No. Bronze filled PTFE is rigid plastic without elasticity. It applies to wear-resistant guide components. If you need elastic sealing parts, choose NBR semi-finished tube.
A: No. Bronze filled PTFE is rigid plastic without elasticity. It applies to wear-resistant guide components. If you need elastic sealing parts, choose NBR semi-finished tube.
Q3: Do I need sintering after machining?
A: No. The tube is fully sintered semi-finished blank, can be machined directly.
A: No. The tube is fully sintered semi-finished blank, can be machined directly.
Q4: Can this material work dry without lubrication?
A: Yes, inherent self-lubrication property allows dry running conditions.
A: Yes, inherent self-lubrication property allows dry running conditions.
Q5: What’s the difference between bronze filled PTFE and virgin PTFE tube?
A: Bronze filled grade has far better anti-creep, compressive strength and heat dissipation; pure PTFE is easy to deform under heavy load.
A: Bronze filled grade has far better anti-creep, compressive strength and heat dissipation; pure PTFE is easy to deform under heavy load.
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