What is PTFE CNC Machining?
PTFE CNC machining uses computer-controlled machines (like mills and lathes) to cut PTFE stock material into precise custom parts. Unlike injection molding, CNC machining works well for low-to-medium volumes, prototypes, and parts requiring tight tolerances.
Why Choose CNC Machining for PTFE?
- Tight tolerances — Achieves ±0.01mm precision
- Complex geometries — Undercuts, threads, step features
- No mold costs — Ideal for custom one-off parts
- Fast turnaround — Prototype in days, not weeks
- Wide material selection — Virgin, glass-filled, carbon-filled PTFE
PTFE Grades for CNC Machining
| Grade | Characteristics | Best For |
|---|---|---|
| Virgin PTFE | Pure, FDA-compliant | Food, medical |
| Glass-filled (25%) | Improved wear resistance | Bushings, seals |
| Carbon-filled (25%) | High strength | Structural parts |
| Graphite-filled | Self-lubricating | Bearings |
| Bronze-filled | Load-bearing | Heavy-duty applications |
Design Guidelines for PTFE CNC Parts
Tolerances
Standard: ±0.05mm
Precision: ±0.01mm
Wall Thickness
Minimum: 0.5mm
Recommended: 1.5mm+ for strength
Tolerances for Key Features
- Holes: Through-holes preferred; blind holes need careful depth control
- Threads: External threads standard; internal threads may need special tooling
- Undercuts: Limited by tooling; discuss with your machinist
Applications of CNC-Machined PTFE Parts
- Semiconductor: Wafer handling components
- Chemical processing: Pump impellers, valve seats
- Medical: Surgical instrument components
- Food processing: FDA-compliant conveyor parts
- Aerospace: High-altitude fluid handling
Getting a Quote for PTFE CNC Parts
To get accurate pricing and lead times, provide:
- Technical drawings (PDF, CAD, STEP files)
- Material grade (or we can recommend)
- Quantity (prototype + production volumes)
- Tolerance requirements
- Any special certifications (FDA, ASTM, ISO)
At Liantuo PTFE, we specialize in precision CNC machining of custom PTFE components. Contact us at sales@liantuoptfe.com for a free quote within 24 hours.