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When a worn or undersized bearing ball causes vibration, noise, or premature failure in your machinery, finding an exact-diameter replacement in the right quantity is the real challenge. Engineers, machinists, hobbyists, and maintenance technicians who need reliable stainless steel ball bearings across a wide size range — from micro 1 mm balls to large 80 mm (3") spheres — will find this listing covers the full spectrum in one place.
These are solid stainless steel precision bearing balls available in diameters ranging from 1 mm to 80 mm (approximately 3/32" to 3"), including both metric and fractional inch sizes such as 3/32", 1/8", 5/32", 3/16", 1/4", 9/32", 3/8", 1/2", 7/8", 1", 1.25", 1.5", 2", 2.5", and 3". The balls are manufactured from stainless steel, offering good corrosion resistance and durability. Quantity options range from as few as 1 piece up to 20,000 pieces per order, making this suitable for both prototyping and production runs.
Typical use cases include replacing worn bearing balls in linear slides, ball screws, and rotary bearings; filling ball-transfer units and caster assemblies; use as check-ball valves in fluid systems; decorative or functional elements in DIY maker projects; and precision grinding media in laboratory or industrial mills. Long-tail search terms that describe this product: stainless steel precision ball bearings bulk, metric bearing balls replacement, fractional inch bearing balls assortment, corrosion-resistant ball bearings for machinery.
Covers 1 mm through 80 mm (3/32" to 3") in metric and fractional inch sizes — one source for virtually any bearing ball replacement need.
Stainless steel material provides resistance to rust and oxidation, suitable for moderate-moisture and general industrial environments.
Manufactured to tight spherical tolerances for smooth rolling, consistent load distribution, and reduced vibration in bearing assemblies.
Order from 1 piece up to 20,000 pieces — ideal for prototyping, maintenance stock, or production-scale procurement.
Includes both metric (1 mm, 2 mm, 3 mm … 80 mm) and fractional inch (3/32", 1/8", 3/16", 1/4", 3/8", 1/2", 7/8", 1", 1.25", 1.5", 2", 2.5", 3") to match legacy and modern equipment.
Suitable for rotary bearings, linear slides, ball screws, check valves, caster wheels, maker projects, and grinding media across industrial and DIY settings.
| Material | Stainless Steel |
|---|---|
| Diameter Range | 1 mm – 80 mm (approx. 3/32" – 3") |
| Available Sizes | Metric and fractional inch; see variant options |
| Quantity per Order | 1 / 2 / 5 / 10 / 20 / 50 / 100 / 200 / 500 / 1000 / 2000 / 5000 / 10000 / 20000 pcs |
| Surface Finish | See variant options |
| Hardness | See variant options |
| Tolerance Grade | See variant options |
| Corrosion Resistance | Good — stainless steel construction |
| Shape | Spherical (solid ball) |
| Application | Bearings, linear slides, ball screws, check valves, casters, grinding media |
Measure the inner diameter of your bearing housing or the seat where the ball sits using a caliper. Match that measurement to the closest available diameter in the variant selector. For fractional-inch equipment (common in North American machinery), use the fractional inch sizes listed (e.g., 3/32", 1/4", 1/2"). For metric equipment, select the corresponding metric size.
The balls are manufactured from stainless steel. For specific alloy grade confirmation (e.g., 304 vs. 316 vs. 440C), please contact us before ordering, as the grade can affect corrosion resistance and hardness for your specific application.
Yes. Stainless steel provides good resistance to rust and oxidation in typical ambient and moderate-moisture environments. For highly corrosive environments (saltwater immersion, strong acids or alkalis), please confirm the specific alloy grade is suitable for your conditions before ordering.
Yes, provided you select the correct diameter to match your existing bearing balls. Measure the original balls with a micrometer for accuracy. These solid spherical balls are suitable for replacing worn balls in radial bearings, linear bearings, ball screws, and similar assemblies.
For a single repair or prototype, quantities of 1–10 pieces are typically sufficient. For maintenance stock or small-batch production, 50–500 pieces offer a cost-effective buffer. For high-volume production or bulk procurement, quantities of 1,000–20,000 pieces are available at progressively lower per-unit cost.
Stainless steel balls can be suitable for food-grade or medical applications depending on the alloy grade and surface finish. Please contact us with your specific requirements (alloy, surface roughness, certifications) so we can confirm suitability before you order.
Standard orders do not include individual certification documents. If you require dimensional inspection reports or material certifications for your application, please contact us prior to ordering to discuss options.
