PTFE Parts We Machine
Ten PTFE part families from seals to insulators.
Ten Part Families We Run Repeatedly
| Part family | Common materials | Key tolerances | Typical finish | Typical order |
|---|---|---|---|---|
| Valve seats | PTFE virgin | +/-0.05 mm, lapped seats | Lapped | 200 to 2,000 pcs |
| Bellows and diaphragm blanks | PTFE virgin | +/-0.1 mm profile | As-machined | 500 to 5,000 pcs |
| Seal rings and backup rings | PTFE + 25 percent glass | +/-0.02 mm | As-machined | 1,000 to 10,000 pcs |
| Slide strips and wear plates | PTFE + bronze | +/-0.05 mm | As-machined | 500 to 5,000 pcs |
| Electrical insulators | PTFE virgin | +/-0.05 mm, high dielectric | Cleaned, sealed pack | 1,000 to 10,000 pcs |
| Chemical pump internals | PTFE virgin | +/-0.05 mm ports | As-machined | 200 to 2,000 pcs |
| Lab and analyzer fittings | PTFE virgin | +/-0.05 mm, leak tested | Cleaned | 500 to 5,000 pcs |
| Cable spacers and bushings | PTFE virgin | +/-0.05 mm ID | As-machined | 5,000 to 20,000 pcs |
| Gasket blanks with grooves | PTFE expanded | Groove +/-0.05 mm | As-machined | 200 to 2,000 pcs |
| Semiconductor fluid handling parts | PFA/PTFE certified | +/-0.05 mm, cleaned per spec | Double bagged | 50 to 500 pcs |
Material detail: PTFE machining. High temperature alternative: PEEK.
Worked examples with full measurement data: case studies.
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Frequently Asked Questions
What tolerance can you hold on plastic parts?
On stable geometries we hold +/-0.005 mm on polymer parts, matching our metal capability; minus-material behavior like moisture uptake is planned into the process. Standard tolerance is +/-0.05 mm unless the drawing calls tighter.
Do plastic parts need annealing?
Stress relief (hot oil or air annealing) is planned per material and geometry; PTFE nearly always gets an anneal before finish passes, and PC benefits on stress-sensitive features.
Can you source certified plastic stock?
Yes, stocked rods and sheets come with mill certificates; medical-grade and ESD grades are sourced per drawing callout.
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