POM-C LF (PTFE-filled) MoS2
Additive grade
also Delrin AF, Ultraform N2320 LF
MoS2 = molybdenum disulphide lubricated
Cheapest lubricated acetal; retains near-unfilled strength with modest friction/wear benefit and a black colour that hides wear debris.
Values for the MoS2 condition
Other POM-C LF (PTFE-filled) grades and fills
POM-C LF (PTFE-filled) is listed in 6 conditions; see the grade overview at POM-C LF (PTFE-filled).
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 |
MoS2This page 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 |
What is POM-C LF (PTFE-filled) MoS2?
POM-C LF (PTFE-filled) MoS2 is POM-C LF (PTFE-filled) in the MoS2 grade — cheapest lubricated acetal; retains near-unfilled strength with modest friction/wear benefit and a black colour that hides wear debris. POM-C LF (PTFE-filled) MoS2 has a yield strength of 58 MPa (8.41 ksi) and a tensile strength of 60 MPa (8.7 ksi) — stronger than 66% of polymer grades. Elongation at break is 20% and the elastic modulus is 2.9 GPa (0.421 Msi). POM-C LF (PTFE-filled) MoS2 has a density of 1.43 g/cm³ (0.0517 lb/in³), heavier than 84% of polymer grades. Its glass-transition temperature is -60°C (-76 °F). PTFE20 is the default condition FabDigit quotes; MoS2 is available on request or by drawing note.
Advantages
- Easy to machine — 88/100, better than 92% of polymer grades
- Conducts heat well — 0.33 W/m·K (0.191 BTU/hr·ft·°F), better than 89% of polymer grades
Limitations
- Heavy — 1.43 g/cm³ (0.0517 lb/in³), worse than 84% of polymer grades
- High mold shrinkage — 2%, worse than 81% of polymer grades
- Needs corrosion protection — 70/100, worse than 78% of polymer grades
POM-C LF (PTFE-filled) MoS2 properties
Typical room-temperature values for POM-C LF (PTFE-filled) MoS2; 26 are specific to this condition. Other listed values are POM-C LF (PTFE-filled) reference data and may not represent this condition. Bars are the position among polymer grades.
Physical5
POM-C LF (PTFE-filled) MoS2 has a density of 1.43 g/cm³ (0.0517 lb/in³), heavier than 84% of polymer grades. Its glass-transition temperature is -60°C (-76 °F).
Mechanical16
POM-C LF (PTFE-filled) MoS2 has a yield strength of 58 MPa (8.41 ksi) and a tensile strength of 60 MPa (8.7 ksi) — stronger than 66% of polymer grades. Elongation at break is 20% and the elastic modulus is 2.9 GPa (0.421 Msi).
Thermal11
POM-C LF (PTFE-filled) MoS2 is rated for continuous service to 100°C (212 °F). It conducts heat at 0.33 W/m·K (0.191 BTU/hr·ft·°F), better than 89% of polymer grades. Thermal expansion is 105 µm/m·K (58.3 µin/in·°F).
Electrical7
POM-C LF (PTFE-filled) MoS2 is an electrical insulator with a dielectric strength of 20 kV/mm (508 V/mil) and a resistivity of 1×10¹¹ 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) MoS2 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) MoS2's machinability is excellent (88/100, better than 92% of polymer grades); weldability poor (20/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with POM-C LF (PTFE-filled) MoS2
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.
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.
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) | — |
POM-C LF (PTFE-filled) MoS2 — frequently asked
What is POM-C LF (PTFE-filled) MoS2 used for?
POM-C LF (PTFE-filled) MoS2 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) MoS2?
POM-C LF (PTFE-filled) MoS2 has a typical yield strength of 58 MPa (8.41 ksi) and a tensile strength of 60 MPa (8.7 ksi) — stronger than 66% of polymer grades. Strength varies by condition: see the 6 listed tempers.
Is POM-C LF (PTFE-filled) MoS2 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) MoS2 be welded?
Not readily — weldability is rated poor (20/100). 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) MoS2?
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) MoS2 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) MoS2?
POM-C LF (PTFE-filled) MoS2 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.