POM-C LF (PTFE-filled)
also Delrin AF, Ultraform N2320 LF
POM-C LF is an acetal internally lubricated with PTFE fibers, typically 20 %, marketed as Delrin AF, Ultraform N2320 LF and Sustarin C-LFX.
Reference datasheet — POM-C LF (PTFE-filled) is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the PTFE20 condition
POM-C LF (PTFE-filled) grades and fills
POM-C LF (PTFE-filled) is supplied in 6 conditions, soft to hard. PTFE20 is the default FabDigit quotes; the values on this page are for it.
Compare all 6 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
PTFE20Default 20 % PTFE internally lubricated | Default dry-running bearing/gear grade: lowest friction and wear of the lubricated POM family, ~15–25 % strength penalty vs unfilled. | 45 | 47 | 20 | 78 Shore D |
Graphite-filled sliding grade | Choose for dry running at slightly higher temperature and where graphite's thermal conduction helps drain frictional heat. | 48 | 50 | 12 | 80 Shore D |
Oil-filled / silicone-lubricated sliding grade | Use where a continuously bleeding lubricant film is wanted for long-life bushings; avoid where oil migration contaminates the product. | 48 | 50 | 25 | 76 Shore D |
10–15 % PTFE lubricated | Pick when moderate friction reduction is enough and mechanical strength must stay closer to unfilled POM-C. | 52 | 54 | 25 | 79 Shore D |
Homopolymer acetal + 20 % PTFE fibre | Homopolymer base with PTFE fibre: highest stiffness/strength and lowest wear of the family, but more sensitive to hot water and strong alkali than copolymer. | 52 | 18 | 80 HRM | |
Molybdenum disulphide lubricated | Cheapest lubricated acetal; retains near-unfilled strength with modest friction/wear benefit and a black colour that hides wear debris. | 58 | 60 | 20 | 82 Shore D |
Supply forms, finishes and certifications
Ways POM-C LF (PTFE-filled) is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
FDA | Food-contact compliant PTFE-lubricated grade | Certification |
What is POM-C LF (PTFE-filled)?
POM-C LF is an acetal internally lubricated with PTFE fibers, typically 20 %, marketed as Delrin AF, Ultraform N2320 LF and Sustarin C-LFX. The PTFE lowers coefficient of friction and wear rate for dry-running sliding and rotating parts, and the material is stocked as rod, tube and sheet for machined bearings as well as moulding compound. Typical values are 1.52 g/cm3 density, 47 MPa tensile strength, 20 % elongation, 2.5 GPa modulus and 100 °C service, with machinability rated 88. Strength is lower than unfilled or glass-filled acetal and the PTFE blocks welding, painting and bonding; use POM-C GF25 where stiffness rather than low friction governs. POM-C LF (PTFE-filled) has a density of 1.52 g/cm³ (0.0549 lb/in³), heavier than 89% of polymer grades. Its glass-transition temperature is -60°C (-76 °F). POM-C LF (PTFE-filled) has a yield strength of 45 MPa (6.53 ksi) and a tensile strength of 47 MPa (6.82 ksi) — weaker than 58% of polymer grades. Elongation at break is 20% and the elastic modulus is 2.5 GPa (0.363 Msi).
What is POM-C LF (PTFE-filled) used for?
- bushings
- slide guides
- gears operating without grease
- cams
- conveyor wear strips
Advantages
- Easy to machine — 88/100, better than 92% of polymer grades
- Conducts heat well — 0.32 W/m·K (0.185 BTU/hr·ft·°F), better than 88% of polymer grades
Limitations
- Heavy — 1.52 g/cm³ (0.0549 lb/in³), worse than 89% of polymer grades
- Difficult to weld — 5/100, worse than 89% of polymer grades
- Needs corrosion protection — 70/100, worse than 78% of polymer grades
- High mold shrinkage — 1.9%, worse than 75% of polymer grades
POM-C LF (PTFE-filled) properties
Typical room-temperature values for POM-C LF (PTFE-filled)-PTFE20; bars are the position among polymer grades.
Physical5
POM-C LF (PTFE-filled) has a density of 1.52 g/cm³ (0.0549 lb/in³), heavier than 89% of polymer grades. Its glass-transition temperature is -60°C (-76 °F).
Mechanical16
POM-C LF (PTFE-filled) has a yield strength of 45 MPa (6.53 ksi) and a tensile strength of 47 MPa (6.82 ksi) — weaker than 58% of polymer grades. Elongation at break is 20% and the elastic modulus is 2.5 GPa (0.363 Msi).
Thermal11
POM-C LF (PTFE-filled) is rated for continuous service to 100°C (212 °F). It conducts heat at 0.32 W/m·K (0.185 BTU/hr·ft·°F), better than 88% of polymer grades. Thermal expansion is 105 µm/m·K (58.3 µin/in·°F).
Electrical7
POM-C LF (PTFE-filled) is an electrical insulator with a dielectric strength of 20 kV/mm (508 V/mil) and a resistivity of 1×10¹² Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (70/100), worse than 78% of polymer grades. UV resistance is poor.
Sustainability4
Producing a kilogram of POM-C LF (PTFE-filled) takes about 105 MJ of energy and emits 4.3 kg of CO₂ — more than 54% of polymer grades. Typical recycled content is 0%.
Manufacturability8
POM-C LF (PTFE-filled)'s machinability is excellent (88/100, better than 92% of polymer grades); weldability not recommended (5/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the polymer family
Yield strength against density for every polymer grade FabDigit runs. POM-C LF (PTFE-filled) is highlighted; hover a dot for its name, or open the interactive family chart.
Working with POM-C LF (PTFE-filled)
Is POM-C LF (PTFE-filled) easy to machine?
Excellent turning/milling with sharp positive-rake tools and no coolant needed; PTFE makes chips powdery, so relieve internal stresses (anneal 140–150 °C) before tight-tolerance finishing.
Can POM-C LF (PTFE-filled) be welded?
Effectively non-weldable — PTFE prevents reliable hot-plate/ultrasonic joints; use mechanical fasteners, snap-fits or press fits.
Can POM-C LF (PTFE-filled) be formed, bent or molded?
Inject at 185–210 °C melt with 70–110 °C mould; shrinkage 1.4–2.2 % is high and anisotropic, so gate for thick-to-thin flow and hold long enough to avoid voids in bearing walls.
POM-C LF (PTFE-filled) chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| PTFE (polytetrafluoroethylene fibre/powdinternal lubricant | 15 – 22 | 20 |
| heat/oxidation stabiliser + acid scavenghindered phenol / formaldehyde scavenger package | 0.3 – 1 | 0.5 |
| polyoxymethylene copolymer (POM-C)acetal copolymer with 1–3 % ethylene-oxide comonomer units | ≥ 78 (balance) |
What surface finishes work on POM-C LF (PTFE-filled)?
Cannot be painted, plated or adhesive-bonded without plasma/etch pretreatment; parts are used as-machined or as-moulded, with a light burnish-in for bearing surfaces.
Equivalent designations
Standards and trade names that resolve to POM-C LF (PTFE-filled) in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Delrin AFUltraform N2320 LFSustarin C-LFX
- Also called
- POM+PTFE
How much does POM-C LF (PTFE-filled) cost?
POM-C LF (PTFE-filled) is a premium-cost polymer ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
POM-C LF (PTFE-filled) — frequently asked
What is POM-C LF (PTFE-filled) used for?
POM-C LF (PTFE-filled) is typically used for bushings, slide guides, gears operating without grease, cams and conveyor wear strips. In short: lowest friction acetal; best-machining acetal grade; runs dry without grease.
What is the yield strength of POM-C LF (PTFE-filled)?
POM-C LF (PTFE-filled) has a typical yield strength of 45 MPa (6.53 ksi) and a tensile strength of 47 MPa (6.82 ksi) — weaker than 58% of polymer grades. Strength varies by condition: see the 6 listed tempers.
Is POM-C LF (PTFE-filled) easy to machine?
Yes — machinability is rated excellent (88/100, better than 92% of polymer grades). Excellent turning/milling with sharp positive-rake tools and no coolant needed; PTFE makes chips powdery, so relieve internal stresses (anneal 140–150 °C) before tight-tolerance finishing.
Can POM-C LF (PTFE-filled) be welded?
Not readily — weldability is rated not recommended (5/100). Effectively non-weldable — PTFE prevents reliable hot-plate/ultrasonic joints; use mechanical fasteners, snap-fits or press fits.
What surface finishes work on POM-C LF (PTFE-filled)?
Cannot be painted, plated or adhesive-bonded without plasma/etch pretreatment; parts are used as-machined or as-moulded, with a light burnish-in for bearing surfaces.
Can POM-C LF (PTFE-filled) be formed, bent or molded?
Inject at 185–210 °C melt with 70–110 °C mould; shrinkage 1.4–2.2 % is high and anisotropic, so gate for thick-to-thin flow and hold long enough to avoid voids in bearing walls.
What is the maximum service temperature of POM-C LF (PTFE-filled)?
POM-C LF (PTFE-filled) is rated for continuous use to about 100°C (212 °F), and briefly to 140°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between POM-C LF (PTFE-filled) PTFE20 and POM-C LF (PTFE-filled) MoS2?
PTFE20 is the default condition — default dry-running bearing/gear grade: lowest friction and wear of the lubricated POM family, ~15–25 % strength penalty vs unfilled. MoS2: cheapest lubricated acetal; retains near-unfilled strength with modest friction/wear benefit and a black colour that hides wear debris. Yield strength is 45 MPa in PTFE20 versus 58 MPa in MoS2.
How much does POM-C LF (PTFE-filled) cost?
POM-C LF (PTFE-filled) is a premium-cost polymer ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- Sustarin C-LFX / TF PTFE-modified acetal stock shapes — Ensinger (2023)
- Ultraform N2320 LF POM copolymer product data — BASF (2022)
- Delrin AF 100 / AF blend PTFE-fibre acetal — DuPont / Celanese (2021)
- CAMPUS plastics database — POM-C lubricated grades (ISO 10350 datasets) — CAMPUS (2024)
- Engineered Materials Handbook Vol.2: Engineering Plastics — ASM International (1988)
- ISO 9988 Plastics — Polyoxymethylene (POM) moulding and extrusion materials — ISO (2020)
- POM/POM+PTFE (2026)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.