Silicon carbide shafts are designed to save wear and tear when the shafts rotates and basically work as bearings. There are two silicon carbide sintering methods: pressureless sintering and reaction bonded sintering. Both of them are characterized with good resistance to corrosion and friction and endurance of high temperature in spite of some differences in the property. They can be designed for shafts used in mechanical products requiring high precision and sealing. Silicon carbide shafts are used in high pressure pumps, magnetic pumps and shield pumps etc.