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PTFE Rod & Bar - CNC Machining Material

Virgin and filled PTFE rod and bar stock for precision machining and industrial fabrication

PTFE rod and bar stock for CNC machining
PTFE rod stock PTFE bar material
In StockCustom LengthsFilled Grades

PTFE Rod & Bar

We supply machining-grade PTFE rod and bar in virgin and filled grades for CNC turning, seals, bearings, and custom components. Standard diameters from 6 mm to 200 mm with lengths up to 2000 mm. Custom cut lengths and CNC machining services available from the same manufacturer.

Diameter Range6 mm – 200 mm
Standard Length1000 mm / 2000 mm
GradesVirgin, glass-filled, carbon-filled, graphite-filled, MOS2-filled
Temperature-200°C to +260°C
FormsSkived rod, molded rod, bar stock
SamplesSamples available
Skived and molded options
Custom cut lengths
Mill test reports available
CNC machining to drawing
Virgin and filled grades
Global export shipping
CNC MachiningBearingsSealsValve PartsRod Stock
Request a Quote CNC Machining Service

Available Materials

PTFE rod and bar are produced in unfilled virgin grade and a range of filled compounds that change wear, creep, and thermal behaviour. The grade selected is the main design decision that follows the application brief.

Material Composition Key Properties Typical Use
Virgin PTFE100% PTFE, unfilledBest chemical resistance; high purity.Chemical and lab service
15% Glass-filledVirgin PTFE + 15% glass fibreHigher wear resistance, lower creep, better dimensional stability under loadBearings, bushings, support rings
25% Glass-filledVirgin PTFE + 25% glass fibreEven higher wear resistance and stiffness, slightly reduced chemical resistanceHeavy-load bushings, valve seats
25% Carbon-filledVirgin PTFE + 25% carbonExcellent thermal conductivity, low creep, electrically conductiveSeals in dynamic service
15% Graphite-filledVirgin PTFE + 15% graphiteLow friction, improved wear under loadHydraulic seals
Bronze-filledVirgin PTFE + 40-60% bronzeVery high compressive strength, good thermal conductivityHeavy-duty bearing surfaces
Carbon + GraphiteCombined fillersHighest wear resistance, low frictionRotary seals, compressor rings

Diameter Range and Tolerance

PTFE rods are stocked in diameters from 6 mm to 300 mm. Standard production length is 1000 mm; 300 mm and 2000 mm lengths are available on request.

Diameter and length tolerance:

Tolerances are confirmed against your drawing.

Cut-to-length service is provided for every diameter. End-facing and light centre-drilling are available when the part will be machined further. For a complete machining review and tolerance guidance, see our PTFE CNC machined parts page.

How to Choose Between Virgin and Filled

For most chemical, electrical, and laboratory service, virgin (unfilled) PTFE rod is the default choice. Samples are available. Its well-known drawbacks are relatively high cold flow under load, moderate wear rate in dynamic service, and poor thermal conductivity.

A filled compound is selected when the application involves any of the following:

  • Sustained mechanical load (bearing surfaces, support rings, thrust washers)
  • Dynamic sealing under pressure (rotary or reciprocating)
  • Friction and wear are the governing design factors
  • The part must hold tight tolerances at temperature

If you are unsure, share the application brief (temperature, pressure, media, load, motion type) and we will recommend the grade. For a deeper comparison of virgin vs filled grades, see our virgin vs filled PTFE guide.

Machining Notes

PTFE is a soft, low-modulus material with a high coefficient of thermal expansion, so it behaves differently from metals on the machine. Standard practice from our shop:

  • Tooling: sharp HSS or carbide, positive rake, large clearance angle; keep speeds moderate and tools polished to avoid built-up edge.
  • Coolant: compressed air or water-soluble flood; do not use cutting oils when the drawing says to avoid them.
  • Fixturing: support thin walls and long shafts to limit deflection; PTFE creeps over time, so avoid aggressive clamping forces.
  • Tolerances: machined to customer drawings; tolerances negotiable.
  • Annealing: rough machine, anneal at 250 °C for 4 hours, then finish to tight tolerance.

For more detail on tolerances, see our PTFE CNC machining tolerance guide.

Industries Served

PTFE rod and bar feed into machined parts that we ship into:

Chemical Processing

Valve seats, lined pipe fittings, custom gaskets, instrument housing.

Laboratory

Sample holders and instrument components.

Semiconductor Wet Process

Fluid handling, manifold components, gas-line fittings.

General Equipment

Bearings and conveyor components.

Oil & Gas

Downhole instrument components, seal assemblies, back-up rings.

Related Articles

Material selection and machining guides

Virgin vs Filled PTFE

Choose the right grade for machining.

PTFE CNC Machining

Custom parts from your drawings.

CNC Machined Parts

Machined to customer drawings; tolerances negotiable.

Frequently Asked Questions

Q: What diameters are available for PTFE rod and bar?

A: Standard diameters range from 6mm to 200mm, with lengths from 100mm to 1000mm. Custom sizes available upon request.

Q: What is the difference between virgin and filled PTFE rods?

A: Virgin PTFE is pure polytetrafluoroethylene with maximum chemical resistance. Filled PTFE contains additives like glass fiber, carbon, or graphite to improve mechanical strength, wear resistance, or thermal conductivity for specific applications.

Q: What tolerances can be achieved with CNC machined PTFE rods?

A: PTFE rod is machined to customer drawings; tolerances negotiable.