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When a worn bearing causes vibration, noise, or premature failure in a machine, finding the exact replacement diameter quickly is critical. Engineers, maintenance technicians, and serious DIYers working on motors, linear slides, drawer mechanisms, or custom jigs need rolling elements they can trust to hold tight tolerances across the full size range.
These solid ball bearings are manufactured from carbon steel and are available in diameters spanning 1mm to 200mm (approximately 0.039 in to 7.874 in), covering both metric and inch-equivalent sizes. Each ball is a single solid rolling element — no cage, no inner race — intended for use as a replacement or build component in bearing assemblies, ball screws, check valves, and precision fixtures.
Typical applications include replacing worn balls in deep-groove ball bearing assemblies, acting as check-valve seats in hydraulic and pneumatic circuits, serving as precision spacers or load-distributing elements in custom jigs, and functioning as rolling elements in drawer slides, casters, and linear motion guides.
| Material | Carbon Steel |
|---|---|
| Diameter Range | 1mm – 200mm (approx. 0.039 in – 7.874 in) |
| Available Sizes | See variant options |
| Pack Quantities | 1 / 10 / 100 PCS |
| Ball Type | Solid (one-piece, no cage) |
| Surface Finish | See variant options |
| Hardness | See variant options |
| Tolerance Class | See variant options |
| Corrosion Resistance | Contact us to confirm |
| Typical Applications | Deep-groove bearings, check valves, ball screws, linear guides, casters, precision fixtures |
Measure the existing ball with a micrometer or digital caliper. Match the measured diameter to the closest available size in the variant selector. For bearing assemblies, the ball diameter must match the original specification — even a 0.1mm deviation can affect load capacity and service life. If you are unsure, contact us to confirm before ordering.
Carbon steel balls offer good hardness and compressive strength for moderate-to-high load applications at typical industrial speeds. For very high-speed spindles or extreme-load conditions, verify the specific grade and hardness with us before use. For corrosive or food-grade environments, stainless steel balls may be more appropriate.
Carbon steel has limited inherent corrosion resistance compared to stainless steel. In dry or lightly oiled environments, carbon steel balls perform well. For wet, humid, or chemically exposed environments, we recommend applying a compatible lubricant or contacting us to discuss stainless steel alternatives.
Yes — these solid balls are designed as drop-in rolling elements for standard deep-groove bearing assemblies, ball screws, and check-valve bodies. Always verify the required ball diameter and tolerance class against your assembly's original specification before ordering.
The pack quantity option lets you order the exact number you need. A single piece (1 PCS) is ideal for a one-off repair. A pack of 10 suits small batch maintenance or keeping a few spares on hand. A pack of 100 is suited to production restocking or bulk replacement jobs. Pricing per ball decreases with larger pack quantities.
Carbon steel solid balls are commonly used as check-valve seats in hydraulic and pneumatic circuits where the fluid is compatible with carbon steel. Confirm the ball diameter matches your valve seat specification and that the operating fluid does not cause corrosion of carbon steel before installation.
Look up the bearing model number in the manufacturer's datasheet to find the ball diameter specification. Standard bearing datasheets list ball diameter, number of balls, and tolerance class. If you cannot locate the datasheet, contact us with the model number and we will help identify the correct size.
