Delrin 100AF Blend | The Workhorse of Low-Friction Acetal
Commonly referred to as 100AF, this is a blend of 2:1 Delrin AF and standard Delrin. It provides the sweet spot between the low friction of PTFE and the mechanical toughness of unmodified acetal — making it the workhorse grade for industrial wear applications.
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What Delrin 100AF Blend offers
Performance characteristics that make 100AF the preferred choice where low friction, mechanical toughness, and machinability must all be balanced.
Higher stiffness and rigidity
Glass fiber reinforcement significantly increases stiffness, making PEEK GF30 well-suited for structural components that must resist bending and deflection.
Improved dimensional stability
Lower thermal expansion and reduced creep enable machined parts to maintain tight tolerances under mechanical load and temperature variation.
Strong mechanical performance under load
Provides higher tensile and flexural strength compared to unfilled PEEK, supporting demanding load-bearing applications.
Better performance for thin-walled and precision parts
The added rigidity supports designs where thinner sections or tighter tolerances are required.
Reliable performance in harsh environments
Maintains stability in environments with heat, mechanical stress, and exposure to fuels, oils, and industrial chemicals.
Common components made from Delrin 100AF Blend
Typical machined parts that require a balance of low friction, toughness, and precision machinability.
High-Speed Rotating Components
Motion transfer in automation, electronics, and medical devices.
Sliding Valve Seats and Seals
Critical components in fluid handling and pneumatic systems.
Conveyor Guides and Sliding Rails
Directing high-speed movement in packaging or bottling lines.
Wear Pads and Machined Wear Strips
Protective barriers in conveyor systems and heavy machinery.
Precision Gears and Cams
Motion transfer in automation, electronics, and medical devices.
Industrial Bushings and Sleeve Bearings
The primary application for 100AF and AF13.
Delrin 100AF Technical Properties
| Property | Test | Delrin AF13 | Unit |
|---|---|---|---|
| Tensile Strength | ASTM D638 | 9,500 | PSI |
| Tensile Modulus | ASTM D638 | 400 | KSI |
| Elongation @ Break | ASTM D638 | 25 | % |
| Flexural Strength | ASTM D790 | 13,500 | PSI |
| Flexural Modulus | ASTM D790 | 390 | KSI |
| Compressive Strength | ASTM D695 | 11,000 | PSI |
| Izod Impact (notched) | ASTM D256 | 1.2 | ft-lb/in |
| Hardness Rockwell | ASTM D785 | M80/R120 | — |
| Property | Test | Delrin AF13 | Unit |
|---|---|---|---|
| HDT @ 264 psi | ASTM D648 | 257 | °F |
| Melting Point | — | 347 | °F |
| CLTE | ASTM E831 | 5.5 | in/in/°F × 10⁻⁵ |
| Thermal Conductivity | ASTM C177 | 1.5 | BTU·in/hr·ft²·°F |
| Property | Test | Delrin AF13 | Unit |
|---|---|---|---|
| Dielectric Strength | ASTM D149 | 500 | V/mil |
| Dielectric Constant | ASTM D150 | 3.5 | — |
| Dissipation Factor | ASTM D150 | 0.005 | — |
| Surface Resistivity | ASTM D257 | 10¹⁵ | Ω/sq |
| Volume Resistivity | ASTM D257 | 10¹⁵ | Ω·cm |
| Property | Test | Delrin AF13 | Unit |
|---|---|---|---|
| Coefficient of Friction (Dynamic) | ASTM D3702 | 0.13 | — |
| Wear Rate (K-factor) | ASTM D3702 | 7 | × 10⁻¹⁰ in³·min/ft·lb·hr |
| Property | Test | Delrin AF13 | Unit |
|---|---|---|---|
| Specific Gravity | ASTM D792 | 1.50 | — |
| Water Absorption (24hr) | ASTM D570 | 0.20 | % |
| Flammability | UL94 | HB | — |
Delrin 100AF rods, plates & tubular bars
Extruded stock shapes are supplied in standard diameters and thicknesses, with custom dimensions available for specific applications.
Rods
Extruded Delrin AF13 rods are supplied for precision sliding, gear, and bearing components where a balance of low friction and mechanical toughness is required. Rods are typically available from 1/2" to 10" diameter and are the preferred stock form for gears, cams, bushings, and guides requiring close-tolerance machining.
Plates
Delrin AF13 plates are supplied for machined wear pads, guide rails, and sliding components requiring low friction with better impact resistance than 100AF. Plates are available from 3/8" to 4" thickness and offer improved machinability and dimensional stability for precision flat components.
Tubular Bars
Delrin AF13 tubular bars provide pre-formed hollow stock for sleeve bearings, guide bushings, and cylindrical sliding components. The improved toughness of AF13 over 100AF makes tubular bars more suitable for applications subject to dynamic loading or intermittent impact during operation.
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How Delrin 100AF Blend compares to other Delrin AF grades
Quick reference guide to help you choose the right Delrin AF material for your application.
| Grade | PTFE Type | Friction (CoF) | Impact Strength | Primary Benefit |
|---|---|---|---|---|
| Delrin AF DE588 | 20% Fiber | 0.19 | 2.5 ft-lb/in (Tough) | Naval/Seal Grade: Conformable for watertight seals and high-shock environments. |
| Delrin 100AF | 20% Fiber | 0.18 (Lowest) | 0.8 ft-lb/in (Brittle) | Max Lubricity: Best for heavy-duty, slow-moving bearings with no lubrication. |
| Delrin AF13 (Blend) | 13% Fiber | 0.19 – 0.20 | 1.2 ft-lb/in (Mod) | The Workhorse: Best balance of wear life, strength, and machinability. |
| Delrin AF13P | 13% Powder | 0.22 – 0.25 | 1.1 ft-lb/in (Mod) | Economy Grade: Lowest cost for high-volume, low-load commercial parts. |
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Frequently Asked Questions
Delrin AF13 is a 2:1 blend of Delrin AF and standard Delrin, resulting in 13% PTFE fiber content, a CoF of 0.19–0.20, and significantly better impact strength (1.0–1.2 ft-lb/in) than 100AF. Delrin 100AF contains 20% PTFE fiber, achieves the lowest CoF of 0.18, and has a higher limiting PV of 11,000 — but at the cost of impact strength (0.7–0.8 ft-lb/in). AF13 is the workhorse grade for most industrial applications; 100AF is reserved for maximum-lubricity, high-load, low-shock applications.
Choose Delrin AF13 when your application involves gears, high-cycle cams, or components subject to impact, vibration, or dynamic loading where the brittleness of 100AF would result in premature cracking. AF13 is also preferred when machinability and dimensional stability are priorities, as its lower internal stress results in better tolerance control. For applications where maximum lubricity and the highest limiting PV are the primary requirements, 100AF remains the better choice.
Yes. Delrin AF13 is the standard grade for precision gears in industrial automation, electronics, and medical devices. It eliminates slip-stick for smooth, quiet gear operation while retaining the tooth strength and fatigue resistance needed for extended high-cycle performance. Its improved toughness over 100AF is critical for gear tooth integrity under repeated engagement loads, making it the preferred AF-grade for virtually all gear applications.
Delrin AF13P and AF DE588 both offer good wear resistance, but they serve different primary roles. AF DE588 is a specialized naval-grade with 20% PTFE fiber and very high impact strength (2.5 ft-lb/in), specifically formulated for seals, gaskets, and watertight applications requiring conformability. AF13P offers better machinability, tighter tolerances, and is more suitable for precision gears, cams, and guides. For structural wear components in industrial machinery, AF13P is the more practical and cost-effective choice.
Delrin AF13 has a limiting PV of approximately 8,300, making it well suited for moderate-to-high load sliding applications. It is the preferred grade for higher-speed, lower-load applications where fatigue resistance and toughness are more important than achieving the absolute maximum PV rating. For very heavy loads at low speeds where maximum PV is required, Delrin 100AF with its limiting PV of 11,000 is the better specification.
Moisture absorption is extremely low for Delrin AF13, at less than 0.2%, similar to standard Delrin and 100AF. This ensures machined components maintain their dimensional tolerances in humid, wet, or submerged environments, making AF13 suitable for precision gears, guides, and bearing components in food processing, medical, and water-exposed industrial applications.
Yes. Like all acetal grades, Delrin AF13 provides excellent electrical insulation. The 13% PTFE fiber content does not significantly affect its dielectric properties, making it suitable for electrical and electronic applications requiring low friction combined with insulating performance. For applications requiring static dissipation, specialist conductive or carbon-filled acetal grades should be considered.
Delrin AF13 is supplied as extruded rods from 1/2" to 10" diameter, plates from 3/8" to 4" thickness, and tubular bars. All shapes are extruded and annealed to support consistent machining performance. AF13's lower internal stress compared to 100AF results in better dimensional stability during machining, making it particularly suitable for precision components. Custom dimensions are available on request.
Yes. Delrin AF13 is used to replace brass, bronze, and aluminium wear components in industrial machinery. It eliminates manual lubrication requirements, reduces weight, and provides quieter operation with improved corrosion resistance. Its combination of low friction, toughness, and precision machinability makes it a practical and cost-effective metal replacement for gears, bushings, cams, and guides across a wide range of industrial applications.