Correct option is A
Gunmetal is commonly used for making bearings due to its excellent wear resistance, corrosion resistance, and ability to withstand high loads. Gunmetal is an alloy of copper, tin, and zinc, and it provides a good balance of strength, ductility, and anti-friction properties. Bearings made of gunmetal are used in various applications, such as in marine components, steam and water fittings, and industrial machinery.
Gunmetal Composition: Typically consists of 85% copper, 5% tin, and 10% zinc. The addition of tin improves corrosion resistance, while zinc increases strength.
Bearing Function: Bearings are used to support rotating shafts and reduce friction between moving parts.
Types of Bearings Made from Gunmetal: Gunmetal is used for
bush bearings,
sleeve bearings, and
thrust bearings in heavy-duty applications.
Advantages of Gunmetal Bearings:
· High resistance to wear and corrosion.
· Excellent machinability and anti-friction properties.
· Suitable for use in wet or abrasive environments.
Other Bearing Materials: Apart from gunmetal, bearings can be made of materials like bronze, babbitt metal, and even polymers for specific applications.
