POM-C+PTFE
also Delrin AF, Hostaform C LF
POM-C+PTFE is an acetal copolymer internally lubricated with PTFE fibre or powder to lower the friction coefficient and wear rate in unlubricated sliding contact.
Reference datasheet — POM-C+PTFE 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+PTFE grades and fills
POM-C+PTFE is supplied in 5 conditions, soft to hard. PTFE20 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
dual lubricated (PTFE + silicone oil) | For the lowest stick-slip and start-up friction (e.g. seat rails, appliance slides) where a small oil bleed on the surface is acceptable. | 43 | 45 | 18 | 77 Shore D |
PTFE20Default POM-C + 20% PTFE powder | Default self-lubricating stock-shape/moulding grade for dry-running bushings, slides and gears. | 48 | 20 | 79 Shore D | |
POM-H (homopolymer) + 20% PTFE fibre | Homopolymer matrix version: highest stiffness, creep resistance and lowest wear rate, but poorer resistance to hot water/alkali than the copolymer. | 50 | 12 | 78 HRM | |
POM + ~13% PTFE fibre blend | Choose when you need most of the friction benefit but want to keep toughness and elongation closer to unfilled acetal. | 55 | 25 | 80 HRM | |
25% glass fibre reinforced, PTFE lubricated | Pick for loaded gears/slides needing high stiffness and creep resistance at temperature; abrasive to soft mating parts. | 90 | 3 | 88 HRM |
Supply forms, finishes and certifications
Ways POM-C+PTFE 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 POM-C | Certification |
What is POM-C+PTFE?
POM-C+PTFE is an acetal copolymer internally lubricated with PTFE fibre or powder to lower the friction coefficient and wear rate in unlubricated sliding contact. At 1.54 g/cm³ it offers 48 MPa tensile strength, 20% elongation, 79 Shore D and 2.7 GPa modulus, and is stocked as rod and plate and moulded into bearings, gears and wear strips; PTFE13, PTFE20, glass-plus-PTFE, silicone-blend and FDA conditions are on file. Continuous service is limited to about 100 °C, strength is below unfilled POM-C, and the surface will not hold paint, plating or adhesive without pre-treatment. Move to PTFE-filled PA or PEEK for higher PV or temperature. POM-C+PTFE has a density of 1.54 g/cm³ (0.0556 lb/in³), heavier than 90% of polymer grades. Its glass-transition temperature is -60°C (-76 °F). POM-C+PTFE has a yield strength of 46 MPa (6.67 ksi) and a tensile strength of 48 MPa (6.96 ksi) — weaker than 55% of polymer grades. Elongation at break is 20% and the elastic modulus is 2.7 GPa (0.392 Msi).
What is POM-C+PTFE used for?
- Plain bearings and bushings
- Slide guides and cam followers
- Gears requiring low-friction operation
- Conveyor wear strips
Advantages
- Conducts heat well — 0.33 W/m·K (0.191 BTU/hr·ft·°F), better than 89% of polymer grades
- Easy to machine — 85/100, better than 88% of polymer grades
Limitations
- Heavy — 1.54 g/cm³ (0.0556 lb/in³), worse than 90% of polymer grades
- Needs corrosion protection — 68/100, worse than 85% of polymer grades
- Difficult to weld — 12/100, worse than 80% of polymer grades
- Degrades in UV without stabilisers — 25/100, worse than 76% of polymer grades
- High mold shrinkage — 1.9%, worse than 75% of polymer grades
POM-C+PTFE properties
Typical room-temperature values for POM-C+PTFE-PTFE20; bars are the position among polymer grades.
Physical5
POM-C+PTFE has a density of 1.54 g/cm³ (0.0556 lb/in³), heavier than 90% of polymer grades. Its glass-transition temperature is -60°C (-76 °F).
Mechanical17
POM-C+PTFE has a yield strength of 46 MPa (6.67 ksi) and a tensile strength of 48 MPa (6.96 ksi) — weaker than 55% of polymer grades. Elongation at break is 20% and the elastic modulus is 2.7 GPa (0.392 Msi).
Thermal11
POM-C+PTFE 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 110 µm/m·K (61.1 µin/in·°F).
Electrical7
POM-C+PTFE 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 good (68/100), worse than 85% of polymer grades. UV resistance is poor.
Sustainability4
Producing a kilogram of POM-C+PTFE takes about 105 MJ of energy and emits 5 kg of CO₂ — more than 54% of polymer grades. Typical recycled content is 0%.
Manufacturability8
POM-C+PTFE's machinability is excellent (85/100, better than 88% of polymer grades); weldability not recommended (12/100); 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+PTFE is highlighted; hover a dot for its name, or open the interactive family chart.
Working with POM-C+PTFE
Is POM-C+PTFE easy to machine?
Excellent: sharp positive-rake tools, high speed, light feed, air or mist cooling; stress-relieve at 120–140 °C before finish cuts to hold tight tolerances.
Can POM-C+PTFE be welded?
Practically unweldable and unbondable — PTFE migrates to the surface; use mechanical fastening, snap fits or press-fit inserts instead.
Can POM-C+PTFE be formed, bent or molded?
Injection mould at 190–210 °C melt / 70–110 °C tool with generous gates and hold pressure; expect ~1.6–2.2% shrinkage and post-mould shrinkage, avoid melt residence >10 min to prevent formaldehyde evolution.
POM-C+PTFE 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 (lubricant, powder or fibre)internal lubricant; 13% typical for fibre blends, 20% for powder | 13 – 20 | 20 |
| heat/antioxidant stabilizer package + pihindered phenol / formaldehyde scavenger, carbon black or TiO₂ | 0.3 – 1 | 0.5 |
| polyoxymethylene copolymer (POM-C, trioxmatrix resin, acetal copolymer | ≥ 78 (balance) |
What surface finishes work on POM-C+PTFE?
No paint, plating or adhesive will hold without flame/plasma or chemical etch pre-treatment; parts are used as-machined or lightly burnished, matte white/grey appearance is normal.
Equivalent designations
Standards and trade names that resolve to POM-C+PTFE in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Delrin AFHostaform C LF
- Also called
- POM-C + 20% PTFEPOM+PTFE
How much does POM-C+PTFE cost?
POM-C+PTFE 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+PTFE — frequently asked
What is POM-C+PTFE used for?
POM-C+PTFE is typically used for plain bearings and bushings, slide guides and cam followers, gears requiring low-friction operation and conveyor wear strips. In short: lowest-friction acetal grade; bearing-grade POM-C; not bondable or weldable.
What is the yield strength of POM-C+PTFE?
POM-C+PTFE has a typical yield strength of 46 MPa (6.67 ksi) and a tensile strength of 48 MPa (6.96 ksi) — weaker than 55% of polymer grades. Strength varies by condition: see the 5 listed tempers.
Is POM-C+PTFE easy to machine?
Yes — machinability is rated excellent (85/100, better than 88% of polymer grades). Excellent: sharp positive-rake tools, high speed, light feed, air or mist cooling; stress-relieve at 120–140 °C before finish cuts to hold tight tolerances.
Can POM-C+PTFE be welded?
Not readily — weldability is rated not recommended (12/100). Practically unweldable and unbondable — PTFE migrates to the surface; use mechanical fastening, snap fits or press-fit inserts instead.
What surface finishes work on POM-C+PTFE?
No paint, plating or adhesive will hold without flame/plasma or chemical etch pre-treatment; parts are used as-machined or lightly burnished, matte white/grey appearance is normal.
Can POM-C+PTFE be formed, bent or molded?
Injection mould at 190–210 °C melt / 70–110 °C tool with generous gates and hold pressure; expect ~1.6–2.2% shrinkage and post-mould shrinkage, avoid melt residence >10 min to prevent formaldehyde evolution.
What is the maximum service temperature of POM-C+PTFE?
POM-C+PTFE 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+PTFE PTFE20 and POM-C+PTFE PTFE-SI?
PTFE20 is the default condition — default self-lubricating stock-shape/moulding grade for dry-running bushings, slides and gears. PTFE-SI: for the lowest stick-slip and start-up friction (e.g. seat rails, appliance slides) where a small oil bleed on the surface is acceptable. Yield strength is 46 MPa in PTFE20 versus 43 MPa in PTFE-SI.
How much does POM-C+PTFE cost?
POM-C+PTFE 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
- Hostaform C 9021 TF / lubricated POM-C grade data — Celanese (2023)
- TECAFORM AH LA (POM-C + PTFE) stock shape datasheet — Ensinger (2023)
- Delrin AF 100 / AF Blend PTFE-filled acetal product data — DuPont / Celanese (2022)
- CAMPUS plastics property database — POM-C lubricated grades — CWFG (2024)
- ASM Handbook Vol.2 / Engineering Plastics — acetal resins — ASM International (1988)
- ISO 9988 Polyoxymethylene (POM) moulding and extrusion materials — ISO (2019)
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.