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When metal corrodes, adds unwanted weight, or creates conductivity issues in your build, engineers and DIY builders turn to PA66 solid nylon balls as a reliable alternative. These precision rolling beads are designed for anyone who needs dimensionally consistent, chemically resistant spheres — from hobbyists assembling custom linear slides to maintenance teams replacing worn rolling elements in light-duty bearing housings.
Each PA66 nylon ball is machined from solid polyamide 66 resin, delivering a smooth, uniform surface finish. The diameter range spans 2 mm (0.079 in) to 50.8 mm (2.0 in), covering both miniature and larger-format applications. Packing quantities range from 2 pcs to 1,000 pcs per order, making it straightforward to stock exactly what your project requires.
Typical use cases include PA66 nylon balls for bearing assemblies in food-safe or wet environments, rolling elements in check valves and flow-control fittings, low-friction spacers in 3D-printer carriages, and replacement balls in caster wheels or drawer slides. Their non-magnetic, electrically insulating properties also make them a go-to choice for sensor housings and electronic enclosures where metal contact must be avoided.
| Material | PA66 (Polyamide 66) Nylon |
|---|---|
| Diameter Range | 2 mm – 50.8 mm (0.079 in – 2.0 in) |
| Surface Finish | Smooth, uniform spherical surface |
| Density | Approx. 1.14 g/cm³ |
| Max. Operating Temperature | Typically up to 120 °C (248 °F) |
| Electrical Properties | Non-conductive (electrically insulating) |
| Chemical Resistance | Resistant to oils, greases, mild acids & alkalis |
| Color | See variant options |
| Load Rating | Light-to-medium duty (see variant options for specific sizes) |
| Packing Quantity | 2 / 4 / 5 / 10 / 20 / 25 / 40 / 50 / 100 / 200 / 250 / 500 / 1000 Pcs |
| Application | Bearings, check valves, casters, linear guides, 3D printer carriages |
Measure the inner bore of your bearing race or housing with a caliper, then select the ball diameter that matches the specified rolling element size. For standard bearing replacements, refer to the bearing's part number datasheet to confirm the ball diameter. If you are designing a custom assembly, allow for a small clearance fit — typically 0.01–0.05 mm — to ensure smooth rolling without binding.
PA66 nylon balls are rated for light-to-medium duty loads. They perform well in applications such as check valves, caster wheels, drawer slides, and low-speed linear guides. They are not suitable for heavy radial or axial loads found in industrial steel-ball bearing races. If your application involves sustained high loads or impact forces, consider steel or ceramic balls instead.
Yes. PA66 nylon does not rust and resists moisture, mild acids, oils, and greases. This makes these balls a practical choice for food-processing equipment, marine hardware, irrigation fittings, and other environments where metal corrosion is a concern. However, prolonged exposure to strong acids, concentrated alkalis, or UV radiation may degrade the material over time — evaluate your specific chemical environment before use.
In many light-duty applications, yes — provided the diameter matches and the load, speed, and temperature requirements fall within PA66's operating range (typically up to 120 °C and moderate loads). PA66 balls will not perform identically to steel in high-speed or high-load bearing races, but they are a reliable substitute in valves, casters, and guide systems where metal-free or non-magnetic properties are needed.
PA66 nylon is widely used in food-processing machinery due to its resistance to oils and moisture. However, food-grade or medical-grade certification depends on the specific resin formulation and any additives used. If your application requires FDA, EU 10/2011, or similar compliance, please contact us to confirm the material specification before ordering.
Some diameters in this listing correspond to standard inch fractions converted to millimeters — for example, 3.175 mm = 1/8 in, 6.35 mm = 1/4 in, 9.525 mm = 3/8 in, 12.7 mm = 1/2 in, 19.05 mm = 3/4 in, 25.4 mm = 1 in, and 50.8 mm = 2 in. These are provided to match both metric and imperial bearing standards. Select the diameter that corresponds to your bearing's specified ball size, whether listed in mm or inches.
Store PA66 nylon balls in a cool, dry location away from direct sunlight and strong UV sources. Avoid storing them near solvents or strong chemicals. PA66 can absorb a small amount of ambient moisture over time, which may cause minor dimensional changes — for precision applications, allow balls to equilibrate to the operating environment before installation.
