Ceramic balls are our speciality, and here are just some of the advantages they offer over steel:
Synthetic ball bearings with ceramic balls are produced by means of a special procedure. Customized ball bearings’ fabrication made of special synthetic material with special balls =
There are only a few providers of solid ceramics ball bearings in the world. Here are some of the outstanding characteristics which set this material apart:
Properties | Silicon Nitride | Tungston Carbide | Steel |
Density | 3.23 g/cm³ | 14.95 g/cm³ | 7.8 g/cm³ |
Hardness | ~ 76 HRc | ~ 76 HRc | ~ 60-67 HRc |
Flexural Strength(3 pt. 20°C) | 1000 MPa | 2600 MPa | 2000 MPa (Zug) |
Compressive Strenght | > 4000 MPa | 6200 MPa | 1400 MPa |
Young's Modulus | 310 GPa | 650 GPa | 205 GPa |
Poisson's Ratio | 0.27 | 0.22 | 0.29 |
Fracture Toughness | 7 MPa-√m | 12 MPa-√m | 70 MPa-√m |
Thermal Expansion | 3.0 x 10-6/°C | 5 x 10-6/°C | 12.5 x 10-6/°C |
Thermal Conductivity | 22 W/m-°C | 100 W/m-°C | 37 W/m-°C |
Specific Heat | 0.68 J/g-°C | 0.34 J/g-°C | 0.50 J/g-°C |
max. Service Temperature | 1000 °C | 450 °C | 180 °C |