Material · Engineering Plastics
Nylon PA66
PA6 upgraded: higher stiffness and service temperature for gears and insulators that run hot.
Price index: $
Material properties
| Parameter | Value |
|---|---|
| Tensile strength | 83 MPa (dry) |
| Yield strength | ~83 MPa (dry) |
| Hardness | R120 (Rockwell, dry) |
| Density | 1.14 g/cm³ |
Choose it when
You like PA6 but need a bit more stiffness, hardness and service temperature — PA66 holds gear teeth and threads crisper and runs hotter for a negligible price difference.
Look elsewhere when
Moisture-driven swelling is the concern: PA66 absorbs slightly less water than PA6 but still far too much for precision fits — that problem is solved by POM, not by switching nylons.
Compatible finishes
As-Machined
The baseline finish: straight off the machine, fastest and cheapest.
Vibratory Tumbling
Batch deburring by the bowl-full: every edge broken, every burr gone, at volume prices.
Laser Marking
Permanent identification with zero dimensional change: serials, logos and codes burned in, not stuck on.
Typical applications
- Gears and cams running near 100 °C
- Electrical insulating blocks and spacers
- Bushings and thrust washers under load
- Automotive under-hood brackets
Compared with similar grades
| Property | Nylon PA66 | ABS | Polycarbonate (PC) | Nylon PA6 |
|---|---|---|---|---|
| Tensile strength | 83 MPa (dry) | 40 MPa | 66 MPa | 79 MPa (dry) |
| Yield strength | ~83 MPa (dry) | ~40 MPa | ~62 MPa | ~79 MPa (dry) |
| Hardness | R120 (Rockwell, dry) | R105 (Rockwell) | R118 (Rockwell) | R119 (Rockwell, dry) |
| Density | 1.14 g/cm³ | 1.05 g/cm³ | 1.20 g/cm³ | 1.14 g/cm³ |
| Price index | $ | $ | $ | $ |
| Machinability | 3/5 | 4/5 | 3/5 | 3/5 |
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