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When a worn or undersized bearing ball causes vibration, noise, or premature failure in your equipment, finding an exact-diameter replacement quickly matters. Engineers, maintenance technicians, and serious DIYers who need solid iron ball bearings across a wide size range — from compact 7mm (0.28") up to heavy-duty 120mm (4.72") — can select the precise diameter and pack quantity that matches their application without over-ordering.
These solid iron ball bearings are manufactured from iron with a smooth, consistent spherical surface. Diameters span 7mm through 120mm (approximately 0.28" to 4.72"), available individually or in multi-piece packs of 2, 5, 10, 20, 50, or 100 units to suit both single-repair and bulk-stocking needs.
Typical use cases include replacement rolling elements in industrial bearing housings, load-distribution balls in jigs and fixtures, valve seats in fluid control assemblies, and precision spacers in custom mechanical assemblies where a specific ball diameter is required.
| Material | Solid iron |
|---|---|
| Diameter Range | 7mm – 120mm (0.28" – 4.72") |
| Available Sizes | 7, 7.5, 8, 8.5, 9, 9.5, 10, 11, 12, 12.7, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 25.4, 26, 27, 28, 29, 30, 32, 35, 38, 40, 42, 45, 50, 60, 62, 70, 80, 90, 100, 110, 120 mm |
| Surface Finish | Smooth spherical |
| Pack Options (PCS) | 1, 2, 5, 10, 20, 50, 100 |
| Ball Type | Solid (non-hollow) |
| Typical Applications | Bearing housings, ball valves, jigs, fixtures, mechanical assemblies |
| Weight per Unit | See variant options |
| Hardness | See variant options |
| Tolerance Grade | See variant options |
Measure the bore or seat diameter of your existing bearing housing or application using a caliper. The ball diameter should match the specified rolling element size in your equipment's service manual or the worn ball you are replacing. This product offers 43 discrete sizes from 7mm to 120mm, so compare your measurement directly to the available size options before adding to cart.
Solid iron construction provides the mass and rigidity needed for moderate-to-high load applications such as industrial bearing housings, valve seats, and fixture contact points. For applications with extreme dynamic loads or very high rotational speeds, verify that the iron material grade meets your engineering specification. Contact us to confirm suitability for critical load-bearing uses.
Iron is susceptible to oxidation when exposed to moisture or corrosive environments. For applications involving water, chemicals, or outdoor exposure, consider applying a protective coating after installation, or contact us to discuss whether a different material grade would better suit your environment. For dry, indoor mechanical applications, iron ball bearings perform reliably without additional treatment.
Yes, provided the diameter matches the specified rolling element size for your bearing. Measure the existing balls or consult the bearing manufacturer's datasheet for the correct ball diameter. These solid iron balls are finished to a consistent spherical profile, making them suitable as direct replacements in many standard bearing housings. Tolerance grade compatibility should be verified for precision bearing applications.
The pack quantity option lets you choose between a single replacement ball for a one-off repair and bulk packs of 2, 5, 10, 20, 50, or 100 pieces for workshop stocking or production-line use. Pricing per unit decreases with larger pack sizes, making bulk orders more economical for recurring maintenance needs or manufacturing applications that consume multiple balls over time.
25.4mm is the metric equivalent of exactly 1 inch. If your application specifies a 1" ball (common in imperial-standard equipment), select the 25.4mm option. If your application specifies 25mm (common in metric-standard equipment), select the 25mm option. Using the wrong size by even 0.4mm can result in improper seating, increased play, or premature wear in precision assemblies.
Pack quantity availability varies by size. Smaller diameters (7mm–35mm) are available across all pack options including 100-piece packs. Larger diameters (60mm and above) are available in selected pack quantities. Check the variant selector for your chosen size to see which pack options are listed. For bulk orders of large-diameter balls not shown, contact us to confirm availability.
