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A single wrong ball diameter can cause uneven load distribution, accelerated race wear, or outright bearing failure — and sourcing the exact replacement size from multiple vendors wastes time. Engineers, maintenance technicians, and serious DIYers who maintain equipment with miniature rolling elements will find these 304 stainless steel ball bearings a dependable single-source solution, available in 23 diameters from 1.1 mm (0.043 in) to 3.0 mm (0.118 in) and in bulk pack sizes of 1,000 to 5,000 pieces.
Each ball is manufactured from 304 stainless steel — a grade recognized for its balanced combination of corrosion resistance, surface hardness, and machinability. The diameter ladder spans 1.1 mm through 3.0 mm (approximately 0.043 in to 0.118 in), covering the most common miniature and sub-miniature bearing sizes used in precision instruments, small motors, and light mechanical assemblies. Pack sizes of 1,000, 2,000, 3,000, and 5,000 pieces allow you to match order quantity to actual consumption rate.
These 304 stainless steel ball bearings are well suited for miniature bearing replacement in optical instruments and medical devices, load-distribution elements in small linear slides and drawer runners, rolling media in vibration-finishing or tumbling operations where consistent spherical geometry is required, and check-valve seats in fluid-handling assemblies exposed to mild corrosive media.
Grade 304 alloy provides resistance to oxidation and mild corrosive environments, making these balls suitable for humid workshops, light washdown areas, and applications where carbon steel would rust prematurely.
A continuous size ladder from 1.1 mm to 3.0 mm (0.043 in – 0.118 in) lets you stock the exact diameter your assembly requires without sourcing from multiple suppliers.
Choose from 1,000, 2,000, 3,000, or 5,000-piece packs. Larger quantities reduce per-unit cost and ensure replacement stock is on hand for ongoing maintenance schedules.
Uniform roundness across each batch supports smooth rolling action and even load distribution, reducing wear on bearing races and housings in miniature mechanisms.
304 stainless steel ball bearings outperform standard carbon steel balls in environments with moisture, mild acids, or cleaning agents — extending service intervals in light industrial settings.
Suitable as rolling elements in miniature radial bearings, thrust bearings, ball screws, check valves, and tumbling/finishing media — wherever a precise, corrosion-resistant sphere is needed.
| Material | 304 Stainless Steel |
|---|---|
| Diameter Range | 1.1 mm – 3.0 mm (0.043 in – 0.118 in) |
| Available Diameters | 1.1, 1.2, 1.25, 1.3, 1.35, 1.4, 1.5, 1.6, 1.65, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.38, 2.5, 2.65, 2.8, 2.85, 2.9, 2.95, 3.0 mm |
| Pack Size Options | 1,000 / 2,000 / 3,000 / 5,000 pcs |
| Surface Finish | See variant options |
| Hardness | See variant options |
| Grade / Tolerance Class | See variant options |
| Corrosion Resistance | Suitable for mild corrosive and humid environments |
| Typical Applications | Miniature bearings, check valves, ball screws, tumbling media, linear slides |
| Product Type | Precision Rolling Elements / Ball Bearings |
Measure the inner diameter of your bearing race or housing using a calibrated micrometer. The ball diameter should match the specification on your bearing's datasheet or the OEM part number. If you are replacing worn balls, measure an undamaged ball from the same set for reference. When in doubt, contact us to confirm before ordering in bulk.
These 304 stainless steel ball bearings are appropriate for low-to-moderate speed applications. For high-speed precision spindles or applications requiring Grade 10 or better tolerance, please confirm the grade specification with us before purchase, as surface finish and roundness tolerance requirements vary by application.
304 stainless steel offers significantly better corrosion resistance than standard carbon steel, making it the preferred choice in humid, wet, or mildly corrosive environments. Carbon steel balls are typically harder and used in high-load, dry applications. If your application involves moisture, cleaning agents, or outdoor exposure, 304 stainless is the more durable option.
304 stainless steel is widely used in food-contact and medical environments due to its corrosion resistance and ease of cleaning. However, specific regulatory compliance (e.g., FDA, ISO 13485) depends on your application and jurisdiction. Please contact us to confirm suitability for your specific use case before ordering.
All pack sizes contain the same ball bearings — the only difference is quantity. Larger packs (3,000 or 5,000 pcs) offer a lower per-unit cost and are suited for production environments or ongoing maintenance stock. Smaller packs (1,000 pcs) are ideal for prototyping, repair work, or lower-volume needs.
These balls are designed to fit standard miniature bearing races in the 1.1–3.0 mm diameter range. Compatibility depends on the specific bearing series and tolerance class of your housing. Always verify the ball diameter against your bearing manufacturer's specification sheet. If you need assistance matching a part number, contact us with your bearing model.
Although 304 stainless steel is corrosion-resistant, storing balls in a dry, sealed container away from chloride-rich environments (such as saltwater or bleach) will maximize their service life. Avoid prolonged contact with dissimilar metals in humid conditions to prevent galvanic corrosion.
Each variant (diameter + pack size combination) is ordered separately. The smallest available pack is 1,000 pieces per diameter. If you need multiple diameters, simply add each variant to your cart individually. Contact us if you require a custom assortment or mixed-diameter bulk quote.
