HDPE CNC Machining Service
A strong, lightweight plastic with excellent chemical resistance, HDPE is a reliable all-rounder fo CNC-machined parts.
What is HDPE?
| High-Density Polyethylene (HDPE) is a thermoplastic known for its high strength-to-weight ratio, excellent durability, and ease of use in manufacturing. It’s lightweight and flexible, making it a staple in both industrial and consumer manufacturing. Due to its low moisture absorption and food-safe grades, HDPE is a go-to choice for fluid-handling systems and components in food and medical applications. |
Material HDPE Capabilities
- Ideal for prototypes and low-volume parts: Fast turnaround with good dimensional control.
- Tolerance: Aligns with ISO 2768-medium unless otherwise specified.
- Colours: Available in black and natural; natural is FDA-approved in EMEA. Additional options are available on request.
- Surface finish: Typically milled and matte, depending on toolpath and speed.
- Flexibility considerations: Parts may require fixturing due to HDPE’s softness.
- Wall thickness: Can accommodate thinner walls than injection moulding depending on part geometry, though strength and accuracy may vary.
HDPE Material Properties
| Tensile Strength ISO 527-2/1A/50 |
Elongation at Break ISO 527-2/1A/50 |
Heat Deflection ISO 75-2B |
Data sheet | |
|---|---|---|---|---|
| HDPE Black | 23 MPa | na | 85 °C | Data sheet |
| HDPE Natural | 23 MPa | na | 85 °C | Data sheet |
CNC Machining
CNC machining is best for quick-turn prototypes or low-volume HDPE parts that don’t require mould investment. It’s great for fast design iterations—just keep in mind that HDPE’s softness can affect finish quality and fixturing.
Design Guidelines
- Avoid overly thin or flexible geometries—HDPE can deflect under machining pressure
- Provide extra fixturing or support features for long, unsupported sections
- Use generous radii and avoid sharp internal corners to improve machinability
- Consider surface finishing needs—HDPE’s softness means visible tool marks are common
Applications
HDPE is used across industries for parts that require toughness, low weight, and chemical resistance:
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