Why Choose Delrin Over Nylon? Supplier Insights
When it comes to choosing engineering plastics for industrial applications, Delrin and Nylon often compete head-to-head. Both are strong, durable, and versatile — but understanding their differences can help you make a smarter choice. In this article, we’ll explore why Delrin might be a better option than Nylon in certain cases, with valuable insights from Delrin rod suppliers who work with these materials every day.
What Is Delrin?
Delrin, also known as Polyoxymethylene (POM), is an acetal homopolymer known for its high strength, rigidity, and excellent dimensional stability. It’s widely used in precision parts that require low friction and high wear resistance — such as gears, bearings, and electrical components.
Key Properties of Delrin:
High mechanical strength
Excellent fatigue resistance
Low moisture absorption
High stiffness and hardness
Smooth surface finish
Good machinability
These properties make Delrin ideal for components that need tight tolerances and consistent performance even under load or stress.
What Is Nylon?
Nylon is a polyamide material known for its toughness and versatility. It’s used in a variety of industries — from textiles to automotive components. However, Nylon tends to absorb more moisture than Delrin, which can lead to dimensional changes and reduced performance in humid conditions.
Key Properties of Nylon:
High impact strength
Good wear resistance
Excellent chemical resistance
More flexible than Delrin
Can absorb up to 3–9% moisture
Delrin vs Nylon: The Key Differences
| Property | Delrin | Nylon |
|---|---|---|
| Moisture Absorption | Very low | High |
| Stiffness | Higher | Lower |
| Friction | Low | Moderate |
| Machinability | Excellent | Good |
| Dimensional Stability | Excellent | Can change with humidity |
| Cost | Slightly higher | Lower |
From this comparison, it’s clear that Delrin outperforms Nylon in areas where precision, low friction, and dimensional stability are essential.
Why Choose Delrin Over Nylon?
1. Superior Dimensional Stability
Delrin absorbs very little moisture, meaning it maintains its shape and size even in humid or wet environments. Nylon, on the other hand, can swell and distort, which may affect performance in tight-fitting applications.
2. Better Machinability
Delrin machines cleanly and easily, producing smooth finishes without tearing or chipping. Many Delrin rod suppliers recommend it for precision parts because it allows for tighter tolerances compared to Nylon.
3. Enhanced Strength and Stiffness
When strength and rigidity are critical, Delrin is the go-to choice. It resists deformation under load, making it ideal for gears, bushings, and structural parts.
4. Low Friction and Wear Resistance
Delrin’s low coefficient of friction allows it to perform well in moving parts, reducing wear and extending the life of components — especially in mechanical or automotive applications.
5. Temperature and Chemical Resistance
Delrin performs reliably across a wide temperature range and resists many chemicals, oils, and solvents. Nylon may soften at lower temperatures and can absorb chemicals over time.
When Should You Still Choose Nylon?
Nylon is still a great choice for cost-sensitive projects or where impact resistance is more important than precision. It’s also preferred when the application involves shock absorption or vibration damping.
However, for demanding industrial use — especially where moisture or dimensional accuracy matters — Delrin remains the better option.
Final Thoughts from Delrin Rod Suppliers
Experienced Delrin rod suppliers often recommend Delrin for long-lasting, precision-based applications. While Nylon remains popular for general use, Delrin offers superior dimensional control, durability, and performance, making it the material of choice for manufacturers who value reliability and consistency.
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