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Custom CNC Machined PTFE Parts, Made to Your Drawing

Virgin and filled PTFE parts machined to your drawing. Per drawing (metric or inch drawings). Tolerances confirmed against your drawing. Email your STEP or PDF drawing to sales@liantuoptfe.com. Samples available.

✓ Machined to your drawing ✓ Per drawing (metric or inch drawings) ✓ PDF, CAD, STEP Accepted ✓ Samples available
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What We Machine

From prototype to mass production — precision CNC parts in PTFE and high-performance polymers.

PTFE CNC machining is the process of cutting precision components from PTFE (polytetrafluoroethylene) and related high-performance polymers using computer-numerically-controlled machine tools. The result is parts with tight dimensional tolerances, smooth surface finishes, and the exact geometry specified in your drawing.

We machine PTFE and filled PTFE grades, as well as UHMWPE, PEEK, and other engineering polymers. From a simple bush or bearing to a complex multi-axis valve component — if it's in a drawing, we can make it.

We accept drawings in PDF, CAD (DXF, DWG), and STEP/STP. Tolerances are confirmed against your drawing. MOQ and lead time are confirmed with each quote. Samples available.

Flange seals that are not a machined shape are usually expanded PTFE sheet or ePTFE joint sealant tape. What is expanded PTFE (ePTFE) and ePTFE vs PTFE gasket explain the expanded material. Media ratings are on the PTFE chemical resistance chart.

PTFE CNC machined pump component

Capabilities & Specifications

What we can produce — tolerances, materials, and formats.

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To drawing
Machined to your drawing
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Per drawing
Metric or inch drawings
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PDF / CAD / STEP
Drawing Formats
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3 / 4 / 5 Axis
CNC Capability
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Per quote
Order Quantity
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Per quote
Minimum Order
ParameterCapabilityNotes
TolerancesPer drawing (metric or inch drawings)Tolerances confirmed against your drawing
Surface finishRa 0.2–3.2 μmDepending on tooling and geometry
Drawing formatsPDF, CAD (DXF, DWG), STEP, STPSTEP preferred for complex geometry
Part size range1mm to 500mmCustom parts outside this range — contact us
Axis capability3-axis, 4-axis, 5-axisComplex geometry supported
Quality inspection100% dimensional checkInspection report available
Lead time (prototype)Confirmed with each quoteDepends on the drawing
Lead time (production)Confirmed with each quoteDepends on quantity

Materials We Machine

PTFE, filled PTFE grades, and other engineering polymers for demanding applications.

Virgin PTFE

Pure PTFE with maximum chemical purity. Maximum chemical resistance across pH 0–14.

Temp: -200°C to +260°C | Friction: Extremely low | Chemical: Universal

Glass-Filled PTFE (25%)

PTFE filled with 25% glass fiber. Improved dimensional stability and compressive strength compared to virgin PTFE. Slightly reduced chemical resistance in strong alkalis.

Temp: -200°C to +260°C | Strength: Higher than virgin | Wear: Improved

Carbon-Filled PTFE

PTFE filled with carbon or graphite. Excellent thermal conductivity and wear resistance. Improved creep resistance under load. Good for dry-running and abrasive media.

Temp: -200°C to +260°C | Conductivity: High | Wear: Excellent

Graphite-Filled PTFE

PTFE with graphite filler. Excellent self-lubricating properties. Good thermal conductivity. Ideal for bearings, bushings, and sliding applications where oil or grease is not available.

Temp: -200°C to +260°C | Lubricity: Excellent | Self-lubricating

MOS₂-Filled PTFE

PTFE with molybdenum disulfide (MOS₂) additive. Improved wear resistance and lower coefficient of friction compared to virgin PTFE. Good for dynamic sealing and bearing applications.

Temp: -200°C to +260°C | Friction: Lower than virgin | Wear: Good

UHMWPE

Ultra-high molecular weight polyethylene. Excellent impact resistance and abrasion resistance. Lower temperature limit than PTFE (-200°C to +80°C) but superior for wear and impact.

Temp: -200°C to +80°C | Impact: Excellent | Wear: Superior

PEEK

Polyether ether ketone. High-performance engineering polymer with excellent mechanical strength, chemical resistance, and temperature capability (+250°C continuous).

Temp: -40°C to +250°C | Strength: High | Chemical: Broad

FEP / PFA

Fluoropolymers similar to PTFE but with slightly different properties. FEP has lower temperature limit (+200°C) but is transparent and melt-processable. PFA offers higher temperature capability (+260°C) with similar properties to PTFE.

Temp: -200°C to +200°C (FEP) | Transparency: Available | Moldable

Parts We Manufacture

Typical PTFE machined components by industry and application.

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Valve Components

Diaphragms, valve seats, stem seals, and body inserts for process valves. PTFE's chemical inertness makes it ideal for aggressive media.

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Pump Parts

Wear rings, thrust washers, bearings, impellers, and pump casings. Carbon-filled and glass-filled PTFE for abrasion-resistant pump components handling slurries and particulate.

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Seals & Bearings

Radial shaft seals, piston rings, backup rings, guide rings, and plain bearings. Self-lubricating PTFE reduces maintenance and eliminates oiling in clean-room environments.

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Electronic Components

Insulators, standoff insulators, circuit board supports, and high-frequency components. PTFE's low dielectric constant makes it ideal for RF and microwave applications.

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Semiconductor Parts

Wafer handling components, process chamber insulators, and precision parts for semiconductor manufacturing equipment. Ultra-high purity virgin PTFE grades.

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Other Machined Parts

Samples available.

Our Machining Process

From your drawing to a precision-machined part — four steps.

1

Drawing Review

Our engineers review your drawing for manufacturability. We confirm dimensions, tolerances, material grade, quantity, and surface finish requirements.

2

Quote & Confirm

Unit price, lead time, and payment terms are confirmed with each quote. No tooling cost. No hidden fees.

3

CNC Machining

Parts are machined on multi-axis CNC equipment from your drawing. Virgin PTFE requires careful machining to prevent material deformation — we have the expertise.

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Inspection & Ship

Every part is dimensionally inspected before packing. Inspection reports available. Parts are carefully packed and shipped globally.

Industries We Serve

PTFE machined parts for chemical, semiconductor, oil & gas, and general industrial applications.

🧪 Chemical Processing

Valves, pump components, and seals for aggressive acid, alkali, and solvent service. Virgin PTFE's universal chemical resistance handles applications where metals corrode and elastomers fail.

💊 Process Equipment

Machined parts for process equipment. Samples available.

🍽️ Other Equipment

PTFE's non-stick surface limits product adhesion. Samples available.

🔬 Semiconductor

Ultra-high purity machined PTFE for wafer handling, process chambers, and precision semiconductor manufacturing equipment. Clean-room compatible components.

⛽ Oil & Gas

Downhole and surface equipment components for petroleum fluids, natural gas, and LNG. Wide temperature range and chemical resistance for upstream and downstream applications.

⚡ Electronics & Electrical

Insulators, standoff components, and high-frequency parts for electrical equipment. PTFE's low dielectric constant and high dielectric strength make it ideal for RF and high-voltage applications.

Frequently Asked Questions

Common questions about our PTFE CNC machining service.

Q: What drawing formats do you accept?
We accept PDF (preferred for 2D drawings), CAD formats (DXF, DWG), and 3D models (STEP, STP, IGES). STEP files are preferred for complex 3D geometry as they preserve surface data better than other formats. If you only have a sketch or photo, contact us — we may be able to work with that.
Q: What tolerances can you achieve on PTFE parts?
Tolerances are confirmed against your drawing. PTFE has a relatively high coefficient of thermal expansion, so the tolerance for each feature is agreed before machining.
Q: Do you offer surface finishing services?
Yes. Standard as-machined surface finish is Ra 1.6–3.2 μm. We also offer polishing, sandblasting, and surface treatment to achieve smoother finishes (Ra 0.2–0.8 μm) for bearing and sealing surfaces. Contact us to discuss your surface finish requirements.
Q: What is the lead time for a prototype?
Lead time depends on part complexity and quantity and is confirmed with each quote.
Q: Do you machine other polymers besides PTFE?
Yes. We machine UHMWPE, PEEK, Nylon (PA6/PA66), Delrin (Acetal/POM), and other engineering plastics. The most common is PTFE and its filled grades, but we have experience across the full range of thermoplastics and fluoropolymers.
Q: What are the key considerations when machining PTFE?
PTFE is relatively soft and has a tendency to flow (creep) under machining pressure. Sharp tools, low cutting speeds, and careful chip evacuation are essential to avoid material deformation and surface defects. Virgin PTFE also tends to gall and stick to cutting tools — correct tooling geometry and feeds are critical. We have developed machining parameters optimized for each PTFE grade we work with.
Q: Do you offer assembly or sub-assembly services?
Our core capability is CNC machining. For simple assembly (press-fitting, adhesive bonding of PTFE to metal housings), contact us to discuss. For complex multi-component assemblies, describe the requirement in the email.
Q: How do I get a quote or a sample?
Email your STEP or PDF drawing to sales@liantuoptfe.com. Samples are available.

Related Articles

Technical guides for engineers and procurement teams.

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PTFE Part Design for CNC Machining

Drawing tips for PTFE parts: feature tolerances, thermal expansion, and filled grades. The product details stay on this page.
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Virgin PTFE vs Filled PTFE

How filler additives affect PTFE properties — strength, wear resistance, thermal conductivity, and chemical resistance.

Have a Drawing to Quote?

Email your PDF, CAD, or STEP file to sales@liantuoptfe.com. Per drawing (metric or inch drawings). Tolerances confirmed against your drawing. Samples available.

Email for Quote / Sample