Produkt Comparison
Ceramic balls:
Ceramic balls are our speciality, and here are just some of the advantages they offer over steel:
- 70 % less thermal expansion
- 60 % lower density
- 50 % higher e-module
- reduced centrifugal force
- higher power-plant mounting rigidity
- less friction
- corrosion resistance
- thermal-shock resistance
- higher hardness and resistance
- resistant to strong pressure
- electrically isolating
- unmagnetic
- considerably longer durability
Special synthetic ball bearings with ceramic balls
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 =
- quality improvement
- longer durability
- high dimensional stability
- big advantage over steel due to specific characteristics such as heat, cold, dampness, bases, acids etc.
Special product solid ceramics ball bearings:
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:
- heat-resistant (up to 1,000 Grad °C)
- resistant to acids, water, bases, gas
- non-corroding, non-magnetic, electrically isolating
- non-lubricant applicable
- up to 40% lighter than hybrid or steel bearings
- multifunctional
Selected mechanical and thermal properties
| 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 |