Strength and wear-resistance

TiC-coated balls are being increasingly requested for space applications. Components used in these types of applications, such as satellites, radars and microwave systems which incorporate TiC-coated bearing balls, offer a superior alternative to traditional steel balls by combining the strength of steel with the wear-resistant properties of ceramics.

These bearings are extremely hard, as they are produced using Chemical Vapour Deposition (CVD) to create a hard, durable layer of around 30 GPa (Gigapascals). Commonly utilised in space-qualified bearings, they offer unique features making them ideal for high-stress environments, operating smoothly and efficiently in applications including high speeds, high temperatures (up to 440C), and radiation.

Other important benefits of TiC-coated balls include enhanced bearing life by reducing adhesive wear, controlling material transfer, and enabling operation in boundary or unlubricated applications. Furthermore, thanks to their thermal and physical stability, unlike silicon nitride (ceramic) balls, TiC-coated steel balls have a similar thermal expansion coefficient to steel bearings, ensuring consistent preload in extreme temperature applications.

TiC-coated bearing balls are highly resistant to corrosion, which is important in space applications where there is no atmosphere to protect materials from harsh environments. They also help to ensure that bearings continue to function properly over long periods of time. Compatibility is also critical because it means TiC bearings can be used in high-vacuum applications, helping to avoid the breakdown of lubricants whilst also preventing cold welding of components.

Carter’s focus on delivering the most resilient components for aerospace bearings is also shared by their success in continuing to develop their space-saving Silverthin thin-section bearings. These thin-section bearings have a very low profile, combined with an ultra-compact design. This helps engineers to reduce the overall weight of their systems and makes them ideal for where space is limited, such as in satellite, radar, and microwave systems.

www.carterbearings.co.uk