Page 162 - CITS - Fitter - Trade Theory

FITTER - CITS

Types of Bearing:
• Plan bearing -Rubbing surfaces, usually with lubricant; some bearings use pumped lubrication and behave
similarly to fluid bearings.

• Roller bearing -Ball or rollers contact both rotating and stationary surfaces which rotate rather than rub.
• Magnetic bearing -Faces of bearing are kept separate by magnets (electromagnets or eddy currents).
• Composite bearing- Plain bearing shape with PTFE liner on the interface between bearing and shaft with a
laminated metal backing. PTFE acts as a lubricant.
Uses of Bearing:
1 Automotive Industry: Bearings are extensively used in vehicles for various applications, including wheel hubs,
transmissions, engines, steering systems, and suspension components. They support rotating shafts, axles,
and gears, allowing for smooth and reliable operation of automotive systems.
2 Industrial Machinery: Bearings are essential components in industrial machinery and equipment, such as
pumps, compressors, motors, turbines, and conveyors. They support rotating shafts, spindles, and other
moving parts, enabling efficient power transmission, motion control, and material handling in manufacturing
and processing operations.
3 Aerospace and Aviation: Bearings are critical in aerospace and aviation applications, where they are used
in aircraft engines, landing gear systems, flight control surfaces, and auxiliary systems. They withstand high
speeds, temperatures, and loads encountered in flight operations while maintaining precision and reliability.
4 Construction and Mining: Bearings are employed in heavy equipment and machinery used in construction,
mining, and earthmoving applications. They support rotating components, such asexcavator buckets, crane
booms, and conveyor belts, allowing for efficient material handling, digging, and lifting operations in rugged
and demanding environments.
5 Railway and Transportation: Bearings are used extensively in railway and transportation systems for
applications such as wheelsets, axle boxes, couplers, and suspension systems. They support the weight of
rolling stock, reduce friction between moving parts, and withstand the dynamic forces and vibrations encountered
during train operation.

6 Marine and Offshore: Bearings play a crucial role in marine and offshore applications, where they are used in
ship propulsion systems, steering mechanisms, deck machinery, and offshore drilling equipment. They withstand
harsh marine environments, high loads, and corrosive conditions while ensuring smooth and reliable operation.
7 Wind Energy: Bearings are integral components in wind turbines, where they support the rotor shaft, gearbox,
and generator. They enable efficient power generation by allowing the rotor blades to rotate smoothly, even
under high wind speeds and loads, while minimizing friction and wear.
8 Medical Devices: Bearings are used in medical devices and equipment, such as surgical instruments, imaging
systems, and laboratory equipment. They provide precise motion control, low friction, and quiet operation in
critical healthcare applications, ensuring accuracy, reliability, and patient safety.
9 Consumer Products: Bearings are found in various consumer products, including household appliances, power
tools, bicycles, and sports equipment. They enable smooth and reliable operation of rotating components, such
as motors, gears, wheels, and shafts, enhancing product performance and user experience.

147

CITS : CG & M - Fitter - Lesson 27