Premier Custom PTFE Bushings Manufacturer and Supplier
Engineered for extreme environments. We deliver high-precision PTFE bushings tailored to your exact specifications. No catalog parts—pure custom manufacturing.
Engineering-First Manufacturing
At Rapidaccu, we are not a catalog stockist. We are a dedicated custom PTFE bushings manufacturer and supplier serving industries where failure is not an option. Our facility is equipped with specialized Swiss-style lathes and multi-axis CNC centers optimized for soft polymers like PTFE (Teflon™).
Processing PTFE requires strict control over environmental variables. Our climate-controlled machining centers ensure thermal stability, preventing the notorious “creep” and dimensional instability often seen in generalist machine shops. Every batch undergoes rigorous inspection including surface roughness testing and air gauging for bore concentricity.
Quality Assurance
Full material traceability (MTRs), First Article Inspection (FAI), and PPAP Level 3 available upon request.
Process Control
Dedicated tooling for plastics to prevent ferrous contamination. Sharp, polished tools ensure burr-free finishes.
Technical Specifications
| Property | Virgin PTFE | Filled PTFE (Glass/Carbon/Bronze) | Notes |
|---|---|---|---|
| Density | 2.15 – 2.20 g/cm³ | 2.20 – 3.90 g/cm³ | Depends on filler content |
| Service Temperature | -200°C to +260°C | -200°C to +260°C | Excellent cryogenic stability |
| Coefficient of Friction | 0.05 – 0.10 | 0.08 – 0.15 | Self-lubricating properties |
| Water Absorption | < 0.01% | < 0.02% | Hydrophobic, no swelling |
| Typical Machining Tolerance | ±0.02mm | ±0.01mm | Filled grades machine cleaner |
| Surface Finish (Ra) | 0.8 – 1.6 µm | 0.4 – 0.8 µm | Can be polished |
Material Behavior Analysis
Cold Flow (Creep)
Virgin PTFE exhibits high creep under load. For high-load bushing applications, we recommend glass or bronze filled grades to increase compressive strength by up to 200%.
Thermal Expansion
PTFE has a high CTE (~100 ppm/°C). Bushing design must account for expansion clearance at operating temperature to prevent seizure on the shaft.
Chemical Resistance
Virtually inert to all chemicals. Ideal for bushings in pumps handling corrosive acids or bases where metal bearings would fail immediately.
Custom Manufacturing Workflow
Design & Feasibility Review
We analyze your drawing for DFM issues specific to PTFE, such as wall thickness ratios and tolerance stack-ups.
Material Selection & Stress Relief
Selecting the right grade (Virgin, Glass-filled, Carbon-filled). Pre-machining stress relief annealing is performed if necessary to ensure stability.
Precision Machining
Using high-speed spindles and sharp tooling to prevent material smearing. Coolant-free or compatible coolant machining to avoid contamination.
Final Inspection & Packaging
100% dimensional check. Parts are cleaned, bagged, and labeled to prevent debris attraction (static control).
Engineering Review: Common Pitfalls
The Interference Fit Trap
Problem: Designers often specify metal-like interference fits for PTFE bushings.
Solution: PTFE is soft. Heavy interference leads to ID collapse. We recommend a lighter press fit combined with a mechanical retention feature (shoulder or groove) or calculating the ID reduction factor (usually ~80-90% of interference).
Surface Finish Spec
Problem: Specifying ultra-low Ra (e.g., 0.2µm) unnecessarily increases cost.
Solution: PTFE is naturally slick. A standard machined finish of 0.8-1.6µm Ra performs excellently. Super-finishing is often redundant unless for sealing surfaces.
Industry Applications
Chemical Processing
Valve seats and pump bushings resistant to aggressive acids.
Semiconductor
Insulating bushings for wafer handling equipment. Low outgassing.
Medical Devices
FDA-compliant biocompatible bushings for surgical fixtures.
Food Machinery
Self-lubricating bushings where grease is prohibited.
Need Precision Custom PTFE Bushings?
Send us your drawings. We provide DFM feedback and competitive quotes within 24 hours.
Frequently Asked Questions
Do you stock standard PTFE bushing sizes?
What is the tightest tolerance you can hold on PTFE?
Can you machine filled PTFE grades?
What is the lead time for custom bushings?
How do you handle burrs on PTFE?
Do you provide material certification?
What is the maximum diameter you can machine?
Is PTFE suitable for high-load applications?
Contact Our Engineering Team
Ready to start your project? Send us your CAD files or drawings. We review every design for manufacturability before quoting.
Standard Working Hours: Mon-Fri 08:00 – 18:00