Delrin AF13P | Ultra-Low Friction for High-Volume Sliding Components
Commonly referred to as Delrin AF13, this is a blend of 2:1 Delrin 100AF and Delrin 150.
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.
What Delrin AF13P offers
Performance characteristics that make Delrin AF13P the cost-effective choice for smooth, quiet motion in high-volume commercial and industrial applications.
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 AF13P
Typical machined parts designed to benefit from the ultra-smooth surface finish and low coefficient of friction provided by 13% PTFE powder dispersion.
Valve Actuators and Moving Seals
Internal moving parts for pneumatic or low-pressure fluid valves.
Wear Strips and Glide Surfaces
Protective sliding interfaces in packaging and handling systems.
Light-Duty Gears and Cams
Motion transfer in appliances and consumer goods.
Linear Motion Guides and Rails
Guiding movement in automated laboratory or office equipment.
Low-Load Bushings and Bearings
Support for rotating shafts in light-duty machinery.
Precision Sliding Components
Linear slides and switching mechanisms in electronics.
Delrin AF13P Technical Properties
| Property | Test | Delrin AF13P | Unit |
|---|---|---|---|
| Tensile Strength | ASTM D638 | 9,200 | PSI |
| Tensile Modulus | ASTM D638 | 390 | KSI |
| Elongation @ Break | ASTM D638 | 22 | % |
| Flexural Strength | ASTM D790 | 13,000 | PSI |
| Flexural Modulus | ASTM D790 | 385 | KSI |
| Compressive Strength | ASTM D695 | 10,500 | PSI |
| Izod Impact (notched) | ASTM D256 | 1.2 | ft-lb/in |
| Hardness Rockwell | ASTM D785 | M79/R119 | — |
| Property | Test | Delrin AF13P | Unit |
|---|---|---|---|
| HDT @ 264 psi | ASTM D648 | 255 | °F |
| Melting Point | — | 347 | °F |
| CLTE | ASTM E831 | 5.3 | in/in/°F × 10⁻⁵ |
| Thermal Conductivity | ASTM C177 | 1.5 | BTU·in/hr·ft²·°F |
| Property | Test | Delrin AF13P | Unit |
|---|---|---|---|
| Dielectric Strength | ASTM D149 | 495 | V/mil |
| Dielectric Constant | ASTM D150 | 3.4 | — |
| Dissipation Factor | ASTM D150 | 0.005 | — |
| Surface Resistivity | ASTM D257 | 10¹⁵ | Ω/sq |
| Volume Resistivity | ASTM D257 | 10¹⁵ | Ω·cm |
| Property | Test | Delrin AF13P | Unit |
|---|---|---|---|
| Coefficient of Friction (Dynamic) | ASTM D3702 | 0.13 | — |
| Wear Rate (K-factor) | ASTM D3702 | 8 | × 10⁻¹⁰ in³·min/ft·lb·hr |
Delrin AF13P rods, plates & tubular bars
Extruded stock shapes are supplied in standard diameters and thicknesses, with custom dimensions available for specific applications.
Rods
Extruded Delrin PTFE 13P rods are supplied for low-friction and sliding machined components. Rods are typically available from 1/2" to 10" diameter.
Plates
Delrin PTFE 13P plates are supplied for machined glide surfaces, wear strips, and sliding parts. Plates are available from 3/8" to 4" thickness.
Tubular Bars
Delrin PTFE 13P tubular bars are available for applications requiring low friction with reduced weight.
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How Delrin AF13P 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. |
Need help determining if Delrin AF13P is the right choice?
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Frequently Asked Questions
Delrin PTFE 13P is an acetal homopolymer resin enhanced with 13% PTFE powder. It is specifically engineered to provide a self-lubricating, low-friction surface for sliding and rotating parts while remaining the most cost-effective solution in the PTFE-filled Delrin family.
Choose 13P when cost and surface finish are your primary drivers for high-volume commercial parts. Choose 100AF when your application involves heavy loads or high-speed continuous motion; the PTFE fibers in 100AF provide a "rebar" effect that resists wear much better than the powder used in 13P.
While both materials contain 13% PTFE and are designed to reduce friction, the fundamental difference lies in the form of the lubricant: 13P uses PTFE powder, while AF13 (also known as AF Blend) uses oriented PTFE fibers. This structural difference makes AF13 a high-performance industrial workhorse, while 13P is a cost-optimized solution for commercial goods.
Yes. The 13% PTFE powder is dispersed throughout the material, allowing it to maintain a self-lubricating surface without the need for external grease. This is ideal for clean environments like office equipment or medical devices.
No. It performs best under low to moderate loads. Because it uses powder rather than fiber reinforcement, the lubricant can "wipe off" the surface under extreme pressure. For high-load or high-pressure conditions, Delrin 100AF or DE588 are significantly more durable.
Moisture absorption is very low (<0.2%), which is a hallmark of the Delrin homopolymer family. This ensures that machined parts, such as small gears or sliders, maintain their precise dimensions in humid or wet conditions.
Yes. It retains excellent dielectric properties, making it a common choice for sliding electrical switches and insulating spacers that require low-friction movement.
Delrin AF13P is widely available in standard extruded rods, plates, and tubular bars. Due to the powder filler, it often machines more cleanly than fiber-filled grades, resulting in a superior, polished surface finish.
Yes, in many light-duty applications. It is frequently used to replace small brass or aluminum bushings to eliminate the need for maintenance, reduce weight, and achieve quieter operation.
It offers the best balance of price and performance. While materials like PEEK-PTFE offer higher temperature resistance, Delrin AF13P provides the high strength, stiffness, and ease of machining associated with Delrin at a much lower cost than specialized high-temp polymers.