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English Application of Ceramic Balls :
Ceramic ball can be used in all bearings with special requirement, metering ball , valve ball, track ball, and precision grinding ball; it can be used in fields requiring chemical resistance, high temperature, electronic insulation, magnetic insulation, non-lubrication. It is an idea substitute for steel ball in chemical corrosion application.
Material: Zirconia, Alumina, Si3N4
Size Range: 1mm - 30mm.
Grade: G3 - G20
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Ceramic Balls SI3N4 ZrO2 SIC For Bearing
MVPS
China Wholesale Small Ceramic Balls Specfication :
| Product Name | Precision Ceramic balls |
| Material | Zirconia, Silicon nitride, silicon carbide, SIC |
| Size | 1mm - 30mm |
| Grade | G3- G20mm |
| Surface Roughness | Ra0.05 |
| Torlerance | +/- 0.001mm |
| Lead time | 10days |
| Shipping | Air Express (DHL/UPS/TNT/ FedEx) |
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Standard Sizes List Of Ceramic Balls
| Inch Size | MM Size | Inch Size | MM Size | Inch Size | MM Size | Inch Size | MM Size |
| 1/16 | 1.588 | 5/16 | 7.938 | 9/16 | 14.288 | 15/16 | 23.812 |
| 3/32 | 2.381 | 11/32 | 8.731 | 19/32 | 15.081 | 1 | 25.4 |
| 1/8 | 3.175 | 3/8 | 9.525 | 5/8 | 15.875 | 17/16 | 26.988 |
| 5/32 | 3.969 | 13/32 | 10.318 | 21/32 | 16.668 | 9/8 | 28.575 |
| 3/16 | 4.762 | 7/16 | 11.1125 | 11/16 | 17.462 | 19/16 | 30.162 |
| 7/32 | 5.556 | 29/64 | 11.509 | 23/32 | 18.256 | 5/4 | 31.75 |
| 15/64 | 5.953 | 15/32 | 11.906 | 3/4 | 19.05 | 21/16 | 33.338 |
| 1/4 | 6.35 | 31/64 | 12.303 | 25/32 | 19.844 | 11/8 | 34.925 |
| 17/64 | 6.747 | 1/2 | 12.7 | 13/16 | 20.638 | 23/16 | 36.512 |
| 9/32 | 7.144 | 17/32 | 13.494 | 7/8 | 22.225 | 3/2 | 38.1 |
Grades of Precision for Ceramic Bearing Balls:
| Grades | Diameter Variation | Spherical Deviation | Diameter Variation of Batch | Surface Roughness(Ra) |
| G5 | 0.13 | 0.13 | 0.25 | 0.014 |
| G10 | 0.25 | 0.25 | 0.5 | 0.020 |
| G16 | 0.4 | 0.4 | 0.8 | 0.025 |
| G20 | 0.5 | 0.5 | 1 | 0.032 |
| G28 | 0.7 | 0.7 | 1.4 | 0.050 |
| G40 | 1 | 1 | 2 | 0.080 |
| G60 | 1.5 | 1.2 | 3 | 0.1 |
| G100 | 2.5 | 2.5 | 5 | 0.125 |
Properties of Best Ceramic Balls Materials:
| Item | Units | Si3N4 | ZrO2 | GCr15 | 9Cr18 |
| Color | - | Black | White | Grey | Grey |
| Density | g/cm3 | ≥3.20 | 5.95-6.05 | 7.85 | 7.85 |
| Hardness (HV) | Gpa | 16 | 12 | 7 | 7 |
| Flexural Strength | Mpa | >720 | 900 | - | - |
| Fracture Toughness | Mpa.m1/2 | 6.2 | 7 | 20 | 25 |
| Elasticity Modulus | Gpa | 300 | 210 | 208 | 200 |
| Coefficient of Thermal Expansion | 10-6/℃ | 3.0-3.2 | 10.3 | 12.5 | 17 |
| Thermal Conductivity | w/m.k | 15-20 | 2.2 | 40 | 40 |
| Volume Resistivity | Ω.cm | >1014 | 1012 | 0.1-1 | 0.1-1 |
| Max. Operating Temp. (No load) | ℃ | 1200 | 850 | 300 | 150 |
 |  |  |
China Wholesale Small Ceramic Balls Specfication :
| Product Name | Precision Ceramic balls |
| Material | Zirconia, Silicon nitride, silicon carbide, SIC |
| Size | 1mm - 30mm |
| Grade | G3- G20mm |
| Surface Roughness | Ra0.05 |
| Torlerance | +/- 0.001mm |
| Lead time | 10days |
| Shipping | Air Express (DHL/UPS/TNT/ FedEx) |
| |
Standard Sizes List Of Ceramic Balls
| Inch Size | MM Size | Inch Size | MM Size | Inch Size | MM Size | Inch Size | MM Size |
| 1/16 | 1.588 | 5/16 | 7.938 | 9/16 | 14.288 | 15/16 | 23.812 |
| 3/32 | 2.381 | 11/32 | 8.731 | 19/32 | 15.081 | 1 | 25.4 |
| 1/8 | 3.175 | 3/8 | 9.525 | 5/8 | 15.875 | 17/16 | 26.988 |
| 5/32 | 3.969 | 13/32 | 10.318 | 21/32 | 16.668 | 9/8 | 28.575 |
| 3/16 | 4.762 | 7/16 | 11.1125 | 11/16 | 17.462 | 19/16 | 30.162 |
| 7/32 | 5.556 | 29/64 | 11.509 | 23/32 | 18.256 | 5/4 | 31.75 |
| 15/64 | 5.953 | 15/32 | 11.906 | 3/4 | 19.05 | 21/16 | 33.338 |
| 1/4 | 6.35 | 31/64 | 12.303 | 25/32 | 19.844 | 11/8 | 34.925 |
| 17/64 | 6.747 | 1/2 | 12.7 | 13/16 | 20.638 | 23/16 | 36.512 |
| 9/32 | 7.144 | 17/32 | 13.494 | 7/8 | 22.225 | 3/2 | 38.1 |
Grades of Precision for Ceramic Bearing Balls:
| Grades | Diameter Variation | Spherical Deviation | Diameter Variation of Batch | Surface Roughness(Ra) |
| G5 | 0.13 | 0.13 | 0.25 | 0.014 |
| G10 | 0.25 | 0.25 | 0.5 | 0.020 |
| G16 | 0.4 | 0.4 | 0.8 | 0.025 |
| G20 | 0.5 | 0.5 | 1 | 0.032 |
| G28 | 0.7 | 0.7 | 1.4 | 0.050 |
| G40 | 1 | 1 | 2 | 0.080 |
| G60 | 1.5 | 1.2 | 3 | 0.1 |
| G100 | 2.5 | 2.5 | 5 | 0.125 |
Properties of Best Ceramic Balls Materials:
| Item | Units | Si3N4 | ZrO2 | GCr15 | 9Cr18 |
| Color | - | Black | White | Grey | Grey |
| Density | g/cm3 | ≥3.20 | 5.95-6.05 | 7.85 | 7.85 |
| Hardness (HV) | Gpa | 16 | 12 | 7 | 7 |
| Flexural Strength | Mpa | >720 | 900 | - | - |
| Fracture Toughness | Mpa.m1/2 | 6.2 | 7 | 20 | 25 |
| Elasticity Modulus | Gpa | 300 | 210 | 208 | 200 |
| Coefficient of Thermal Expansion | 10-6/℃ | 3.0-3.2 | 10.3 | 12.5 | 17 |
| Thermal Conductivity | w/m.k | 15-20 | 2.2 | 40 | 40 |
| Volume Resistivity | Ω.cm | >1014 | 1012 | 0.1-1 | 0.1-1 |
| Max. Operating Temp. (No load) | ℃ | 1200 | 850 | 300 | 150 |
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