HDPE CNC Machining
Services On Aria
High-Density Polyethylene (HDPE) is a versatile thermoplastic prized for its exceptional strength-to-density ratio, chemical resistance, and moisture-proof properties.
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What is HDPE CNC Machining?
HDPE is a durable, chemically resistant, and lightweight thermoplastic widely used in industrial, medical, and consumer applications. CNC machining allows for the production of high-quality HDPE components without the need for expensive molds, making it ideal for:
- Prototyping
- Low-to-medium volume production
- Custom or complex parts
Why Choose HDPE CNC Machining?
Cost-Effective
No tooling costs; ideal for prototypes and low-volume runs.
Design Flexibility
Complex geometries and intricate features achievable.
Material Integrity
Avoids stress cracks or warping (common in molded HDPE).
Fast Turnaround
Digital workflows expedite production vs. traditional methods.
HDPE Properties
Density
Tensile Strength
Chemical Resistance
Moisture Absorption
Temperature Range
0.93–0.97 g/cm³
20–37 MPa
Resistant to acids, alkalis, solvents
<0.01%
-50°C to +80°C
HDPE CNC Machining Parameter
Parameter
Typical Value
Description
Spindle Speed
10,000 - 20,000 RPM
Higher speeds (18K+ RPM) recommended for fine finishes; lower speeds for larger tools
Spindle Power
3 – 15 kW
5-8 kW sufficient for most applications; higher power needed for heavy material removal
Feed Rate
500 - 2,000 mm/min
Start at 800 mm/min and adjust based on tool engagement
Cutting Depth
0.5-6 mm (axial)
1-3 mm ideal for finishing; up to 6 mm acceptable for roughing with proper tooling
Cutting Width
30–70% of tool diameter
50% stepover provides good balance between efficiency and tool life
Machining Accuracy
±0.05–0.1 mm (standard)
±0.02 mm achievable with precision tooling and machine calibration
Surface Roughness
Ra 1.6–3.2 μm (as-machined)
Can achieve Ra 0.8 μm with fine finishing passes and sharp tools
Tool Type
2–4 flute carbide end mills
3-flute optimal for HDPE; polished or ZrN-coated tools reduce material sticking
Tool Diameter
1-20 mm
3-8 mm most common; 12mm for heavy stock removal
Coolant Type
Air blast (preferred)
Minimal coolant needed; dry machining possible with proper chip evacuation
Chip Load
0.05 - 0.15 mm/tooth
Lower values for finishing; higher for roughing operations
Ramp Angle
3-10°
Shallower angles (3-5°) recommended for smaller tools to reduce breakage risk
Stepover
30% - 70% of Tool Diameter
40-50% provides optimal balance between surface finish and machining time
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