Bearing lubrication frequency should be

• A. When there is extra time
• B. Only when shutting down
• C. As recommended by the manual
• D. Anytime equipment is used

Answer: (C)

Lubrication frequency is determined by how the bearing is designed to be serviced and the conditions it operates under. The manufacturer’s manual specifies intervals based on factors like lubricant type and viscosity, load and speed, temperature, seal type, and the environment. Following those recommendations keeps the lubricant film adequate to prevent metal-to-metal contact while avoiding over-lubrication, contamination buildup, or wasted lubricant. Deviating from the manual—whether by lubricating only at shutdown, only when there’s extra time, or every time the equipment is used—can lead to dry-running, excessive grease or oil heat, or dirt entrainment, all of which shorten bearing life. So, the best practice is to follow the lubrication schedule exactly as the manual prescribes.