What is a likely consequence of inadequate lubrication for bearings?

What is a likely consequence of inadequate lubrication for bearings?

• A. Increased Friction and Wear
• B. Decreased Friction
• C. No Effect
• D. Improved Efficiency

Answer: (A)

When lubrication is inadequate, the film that separates bearing surfaces is too thin or missing, so metal-to-metal contact increases. That extra contact raises friction, which turns more of the input energy into heat. The additional heat accelerates wear of the bearing surfaces and raceways and can lead to overheating, noise, vibration, and ultimately premature bearing failure. Bearings rely on a sufficient lubricant to maintain a protective film and to carry the load smoothly, so insufficient lubrication directly leads to higher friction and faster wear. The other options don’t fit because decreased friction would require adequate lubrication, no effect ignores the lubricant’s essential role, and improved efficiency would not occur when friction is elevated.

When lubrication is inadequate, the film that separates bearing surfaces is too thin or missing, so metal-to-metal contact increases. That extra contact raises friction, which turns more of the input energy into heat. The additional heat accelerates wear of the bearing surfaces and raceways and can lead to overheating, noise, vibration, and ultimately premature bearing failure. Bearings rely on a sufficient lubricant to maintain a protective film and to carry the load smoothly, so insufficient lubrication directly leads to higher friction and faster wear. The other options don’t fit because decreased friction would require adequate lubrication, no effect ignores the lubricant’s essential role, and improved efficiency would not occur when friction is elevated.