Overview
Delrin® 100 is a premium unfilled acetal homopolymer (POM-H) grade manufactured by DuPont (now part of Delrin® Corporation). It is recognized for its outstanding combination of high strength, stiffness, toughness, fatigue resistance, dimensional stability, and low friction characteristics.
As one of the highest-performance unfilled acetal grades, Delrin 100 delivers superior mechanical properties compared to many standard acetal copolymers, making it ideal for precision engineering applications requiring durability, wear resistance, and tight tolerances.
Delrin 100 is widely used in:
- Precision Gears
- Bearings and Bushings
- Automotive Components
- Conveyor Systems
- Medical Equipment
- Industrial Machinery
- Electrical Components
- Consumer Products
Due to its exceptional machinability and fatigue resistance, Delrin 100 is frequently selected as a lightweight replacement for metal components.
Material Specification
| Property | Value |
|---|---|
| Material Designation | Delrin® 100 |
| Full Name | Polyoxymethylene Homopolymer (POM-H) |
| Common Name | Delrin 100 |
| Material Family | Engineering Thermoplastic |
| Density | 1.41–1.42 g/cm³ |
| Appearance | Natural White |
| Fillers | None |
| Typical Manufacturing Methods | CNC Machining, Injection Molding, Extrusion |
| Standard Forms | Rod, Sheet, Tube, Pellets |
Chemical Composition
Delrin 100 consists of highly crystalline polyoxymethylene homopolymer.
| Component | Function |
|---|---|
| Polyoxymethylene Homopolymer | Structural Matrix |
| Thermal Stabilizers | Processing Stability |
| Processing Additives | Manufacturing Enhancement |
The highly crystalline structure provides superior strength and rigidity.
Mechanical Properties
Typical Values
| Property | Value |
|---|---|
| Tensile Strength | 72–76 MPa |
| Yield Strength | 65–72 MPa |
| Elongation at Break | 25–40% |
| Flexural Strength | 95–110 MPa |
| Flexural Modulus | 3.0–3.3 GPa |
| Hardness | Rockwell M90–95 |
| Compressive Strength | 100–125 MPa |
Typical Mechanical Performance
| Property | Performance |
|---|---|
| Strength | Outstanding |
| Stiffness | Outstanding |
| Fatigue Resistance | Outstanding |
| Impact Resistance | Good |
Delrin 100 offers some of the highest mechanical performance among unfilled acetal materials.
Physical Properties
| Property | Value |
|---|---|
| Density | 1.41–1.42 g/cm³ |
| Water Absorption | 0.2–0.8% |
| Thermal Conductivity | 0.31 W/m·K |
| Specific Heat Capacity | 1400 J/kg·K |
| Coefficient of Thermal Expansion | 110 ×10⁻⁶/°C |
Delrin 100 maintains excellent dimensional consistency across varying environmental conditions.
Thermal Properties
| Property | Value |
|---|---|
| Melting Point | 175–180°C |
| Heat Deflection Temperature | 120–125°C |
| Continuous Service Temperature | -40°C to 100°C |
| Short-Term Service Temperature | Up to 140°C |
Delrin 100 performs reliably in most industrial operating environments.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| Delrin 100 | 1.42 | 75 MPa |
| POM-C | 1.41 | 65 MPa |
| Nylon 6 | 1.14 | 75 MPa |
| Aluminum 6061 | 2.70 | 310 MPa |
Delrin 100 offers an excellent balance of lightweight design and mechanical performance.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Water | Excellent |
| Oils & Greases | Excellent |
| Fuels | Excellent |
| Alcohols | Excellent |
| Hydrocarbons | Good |
| Dilute Alkalis | Good |
| Dilute Acids | Moderate |
| Strong Acids | Poor |
Delrin 100 is highly resistant to automotive fluids and industrial lubricants.
Moisture Resistance
| Property | Performance |
|---|---|
| Water Absorption | Low |
| Humidity Stability | Excellent |
| Dimensional Stability | Excellent |
| Environmental Resistance | Excellent |
Low moisture absorption helps maintain precision tolerances.
Friction & Wear Properties
| Property | Value |
|---|---|
| Coefficient of Friction | 0.20–0.35 |
| Self-Lubricating Characteristics | Good |
| Wear Resistance | Excellent |
| Sliding Performance | Excellent |
Delrin 100 is widely used in moving mechanical systems.
Electrical Properties
| Property | Value |
|---|---|
| Volume Resistivity | >10¹⁴ Ω·cm |
| Surface Resistivity | >10¹³ Ω |
| Dielectric Strength | 18–25 kV/mm |
| Dielectric Constant | 3.7 |
Delrin 100 is suitable for electrical and electronic insulation applications.
Fatigue Resistance
| Property | Performance |
|---|---|
| Cyclic Loading Resistance | Outstanding |
| Long-Term Durability | Outstanding |
| Creep Resistance | Excellent |
| Gear Performance | Outstanding |
Delrin 100 is one of the preferred materials for gears and repetitive motion mechanisms.
Machinability
| Process | Rating |
|---|---|
| CNC Milling | Outstanding |
| CNC Turning | Outstanding |
| Drilling | Outstanding |
| Tapping | Outstanding |
| Precision Machining | Outstanding |
Machinability Comparison
| Material | Machinability |
|---|---|
| Delrin 100 | Outstanding |
| POM-C | Excellent |
| Nylon | Good |
| PEEK | Excellent |
Delrin 100 is widely regarded as one of the easiest engineering plastics to machine.
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| CNC Machining | Outstanding |
| Injection Molding | Excellent |
| Extrusion | Excellent |
| Precision Manufacturing | Outstanding |
Delrin 100 is highly suitable for both prototype and production manufacturing.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | POM-H |
| ISO | Polyoxymethylene Homopolymer |
| DIN | POM-H |
| JIS | POM-H |
| GB/T (China) | 聚甲醛均聚物（POM-H） |
| Delrin® Corporation | Delrin® 100 |
Available Forms
| Product Type | Availability |
|---|---|
| Rod | Yes |
| Sheet | Yes |
| Tube | Yes |
| Pellets | Yes |
| Injection Molded Parts | Yes |
| CNC Machined Components | Yes |
Typical Applications
Automotive Industry
- Fuel System Components
- Door Lock Mechanisms
- Interior Mechanical Components
- Window Lift Systems
Industrial Machinery
- Precision Gears
- Bearings
- Bushings
- Rollers
Electrical Industry
- Switch Components
- Connector Housings
- Insulating Parts
Medical Industry
- Instrument Components
- Medical Device Mechanisms
- Equipment Parts
Consumer Products
- Fasteners
- Sporting Equipment Components
- Precision Assemblies
Automation Systems
- Conveyor Components
- Linear Guides
- Motion Control Systems
Advantages
Outstanding Machinability
Ideal for precision CNC machining and tight-tolerance components.
Excellent Fatigue Resistance
Performs exceptionally well under repeated loading cycles.
High Strength and Stiffness
Provides reliable mechanical performance.
Low Friction
Suitable for gears, bearings, and moving assemblies.
Excellent Dimensional Stability
Maintains precision across varying environments.
Cost-Effective Metal Replacement
Offers excellent performance at a lower weight and cost.
Limitations
Moderate Temperature Resistance
Not suitable for prolonged exposure above 100°C.
Limited UV Resistance
Outdoor applications may require UV stabilization.
Sensitive to Strong Acids
Not recommended for aggressive acidic environments.
Lower Heat Resistance Than High-Performance Plastics
PEEK, PPS, and PEI offer superior thermal performance.
Comparison with Acetal Grades
| Property | Delrin 100 | POM-C | Delrin AF |
|---|---|---|---|
| Strength | Outstanding | Excellent | Good |
| Fatigue Resistance | Outstanding | Excellent | Excellent |
| Wear Resistance | Excellent | Excellent | Outstanding |
| Friction | Low | Low | Very Low |
| Machinability | Outstanding | Excellent | Excellent |
Comparison with Nylon 6
| Property | Delrin 100 | Nylon 6 |
|---|---|---|
| Moisture Resistance | Better | |
| Dimensional Stability | Better | |
| Fatigue Resistance | Better | |
| Impact Resistance | Similar | |
| Machinability | Better |
Delrin 100 is often preferred where dimensional precision is critical.
Available Surface Finishes
Standard Finishes
- Natural Machined Finish
- Molded Finish
- Matte Finish
Functional Finishes
- Precision Ground Finish
- Bearing Surface Finish
- Low-Friction Finish
Specialty Grades
- Delrin 100
- Delrin AF
- Delrin 500P
- Glass Reinforced Delrin
- Medical Grade Delrin
Frequently Asked Questions (FAQ)
What is Delrin 100?
Delrin 100 is a premium unfilled POM-H acetal homopolymer offering exceptional strength, stiffness, fatigue resistance, and machinability.
What is Delrin 100 used for?
Typical applications include:
- Precision Gears
- Bearings
- Bushings
- Automotive Components
- Industrial Machinery
Is Delrin 100 stronger than POM-C?
Yes. Delrin 100 generally offers higher strength, stiffness, and fatigue resistance than standard POM-C grades.
Is Delrin 100 easy to machine?
Yes. It is considered one of the most machinable engineering plastics available.
Why choose Delrin 100?
Because it combines:
- Outstanding Machinability
- High Strength
- Excellent Fatigue Resistance
- Low Friction
- Dimensional Stability
What is the difference between Delrin 100 and Delrin AF?
Delrin 100 is optimized for mechanical strength, while Delrin AF contains PTFE for enhanced wear resistance and lower friction.
Does GCNOV provide Delrin 100 manufacturing services?
Yes. GCNOV provides:
- Delrin 100 CNC Machining
- Injection Molding
- Precision Gear Manufacturing
- Bearing & Bushing Production
- Prototype Development
- Low-Volume Production
- Mass Production
- Custom Engineering Plastic Components