| Parameter | Value Range |
|---|---|
| Diameter | 0.5–50 mm |
| Precision Grade | G3–G60 |
| Density | 3.6–6.0 g/cm³, depending on material |
| Hardness | HV 1200–1700, depending on material |
| Surface Roughness | Ra 0.010–0.080 μm, depending on precision grade |
| Material | Selection Characteristics | Typical Applications |
|---|---|---|
| Alumina Ceramic (Al₂O₃) | Provides a practical balance of hardness, wear resistance, electrical insulation, and cost. | General industrial bearings, valves, pumps, and measuring equipment. |
| Zirconia Ceramic (ZrO₂) | Offers higher toughness and density for applications involving repeated contact stress. | Valve balls, dosing assemblies, medical equipment, and precision mechanisms. |
| Silicon Nitride (Si₃N₄) | Combines low density and low rolling inertia with strong fatigue performance. | High-speed bearings, electric motors, machine-tool spindles, and rotating equipment. |
| Silicon Carbide (SiC) | Provides high rigidity, chemical stability, and resistance to material wear. | Chemical pumps, corrosive-fluid valves, semiconductor equipment, and high-temperature systems. |
Lightweight silicon nitride balls help reduce centrifugal load and heat generation in high-speed motors, machine-tool spindles, and hybrid ceramic bearings.
Accurate sphericity and a consistent contact surface help ceramic balls form repeatable seals in check valves, dosing systems, and fluid-control assemblies.
Wear-resistant ceramic balls can serve as moving or sealing elements in equipment where repeated contact may affect flow consistency and service life.
Materials can be selected according to cleanliness, electrical insulation, and fluid compatibility requirements in wafer-processing and fluid-delivery equipment.
Alumina and zirconia balls can be used in dosing, analytical, and sample-handling mechanisms that require smooth movement and stable material performance.
Controlled diameter and surface quality support positioning, indexing, and low-friction movement in precision instruments and automated machinery.
Different precision grades are available for general industrial movement, valve sealing, and high-precision bearing applications.
Diameter variation, sphericity, and batch consistency are controlled to support uniform contact, predictable rolling, and repeatable sealing.
Materials can be selected according to operating speed, load, fluid compatibility, electrical requirements, and the type of contact within the assembly.
Fine surface finishing helps reduce rolling friction, localized wear, and the risk of damage to mating components during repeated operation.
Diameter, precision grade, surface requirements, and inspection items can be specified for prototype testing, replacement components, and production quantities.
Explore more ceramic ball products for different industrial applications.
| Inch (in)英寸（in） | Millimeter (mm) | Inch (in) | Millimeter (mm) |
|---|---|---|---|
| 1/32 | 0.794 | 11/32 | 8.731 |
| — | 0.800 | 3/8 | 9.525 |
| — | 1.000 | 7/16 | 11.112 |
| 1/16 | 1.588 | 31/64 | 12.303 |
| 3/32 | 2.381 | 1/2 | 12.700 |
| 5/32 | 3.969 | 17/32 | 13.494 |
| 3/16 | 4.763 | 9/16 | 14.288 |
| 7/32 | 5.556 | 19/32 | 15.081 |
| 15/64 | 5.953 | 5/8 | 15.875 |
| 1/4 | 6.350 | 3/4 | 19.050 |
| 17/64 | 6.747 | 1 | 25.400 |
| 9/32 | 7.144 | 1 1/4 | 31.750 |
| 5/16 | 7.938 | 1 11/16 | 42.863 |
We can manufacture ceramic balls with diameters ranging from0.5 mm – 50 mm (custom sizes available upon request)
Standard: GB308-2002 / ISO 3290-1998标准：GB308-2002 / ISO 3290-1998
| Grade年级 | Diameter Variation (µm)直径变化（µm） | Sphericity Error (µm)球形误差（µm） | Surface Roughness Ra (µm)表面粗糙度 Ra (µm) |
|---|---|---|---|
| G3 | 0.08 | 0.08 | 0.010 |
| G5 | 0.13 | 0.13 | 0.014 |
| G10 | 0.25 | 0.25 | 0.020 |
| G16 | 0.40 | 0.40 | 0.025 |
| G20 | 0.50 | 0.50 | 0.032 |
| G24 | 0.60 | 0.60 | 0.040 |
| G28 | 0.70 | 0.70 | 0.050 |
| G40 | 1.00 | 1.00 | 0.060 |
| G60 | 1.50 | 1.50 | 0.080 |
| rade年级 | Diameter Variation Vdws (µm)直径变化 Vdws (µm) | Sphericity ΔSph (µm)球形度 ΔSph (µm) | Lot Diameter Variation Vdwl (µm)批次直径变异 Vdwl (µm) | Surface Roughness Ra (µm)表面粗糙度 Ra (µm) |
|---|---|---|---|---|
| G3 | 0.05 – 0.07 | 0.05 – 0.07 | < 0.13 | 0.009 – 0.010 |
| G5 | 0.08 – 0.12 | 0.08 – 0.12 | < 0.25 | 0.009 – 0.010 |
| G10 | 0.15 – 0.20 | 0.15 – 0.20 | < 0.5 | 0.014 – 0.018 |
| G16 | 0.20 – 0.25 | 0.20 – 0.25 | < 0.8 | < 0.025 |
| G20 | 0.30 – 0.40 | 0.30 – 0.40 | < 1.0 | < 0.032 |
| G28 | 0.40 – 0.70 | 0.40 – 0.70 | < 1.4 | < 0.050 |
The precision grade of ceramic balls directly determines:
Higher precision = higher performance, but also higher cost.
Selecting the right grade is critical for achieving optimal cost-performance balance.
The appropriate ceramic ball grade depends on rotational speed, allowable vibration, sealing requirements, load, and total equipment cost. A higher precision grade is not automatically necessary for every application.
| Grade Range | General Characteristics | Typical Application Direction |
|---|---|---|
| G3–G5 | High geometric accuracy and tightly controlled surface quality | High-speed bearings, precision spindles, and sensitive instruments |
| G10–G16 | Balanced precision and production cost | Industrial bearings, motors, pumps, and precision mechanisms |
| G20–G28 | Suitable for applications with moderate dimensional requirements | Valves, fluid-control assemblies, and general mechanical components |
| G40–G60 | Suitable where high rolling or sealing precision is not required | General industrial uses selected according to operating conditions |
Final grade selection should be confirmed according to the drawing and operating requirements.
Material selection depends on operating speed, load, temperature, fluid compatibility, electrical requirements, and impact conditions. Alumina, zirconia, silicon nitride, and silicon carbide each provide different performance characteristics.
Precision grades from G3 to G60 are available, depending on the ceramic material, ball diameter, production quantity, and application requirements. Final availability should be confirmed after technical review.
Yes. Ceramic balls with diameters from 0.5 mm to 50 mm can be evaluated. Please provide the required material, diameter, tolerance, precision grade, and quantity for confirmation.
Depending on the order requirements, inspection may include diameter variation, sphericity, lot diameter variation, and surface roughness. Additional inspection requirements should be specified before production.
Yes. CERAMPRO serves OEM customers in the USA, Germany, Japan, and Europe. We support drawing review, sample evaluation, production inspection, export packaging, and international delivery.
