It should not be attempted to pump grease into a _______

It should not be attempted to pump grease into a _______

• A. sealed bearing
• B. open bearing
• C. sleeve bearing
• D. bearing housing

Answer: (A)

Sealed bearings are designed as maintenance-free units with lubricant sealed inside by tough seals. They’re not meant to be re-lubed. Pumping grease into one can push lubricant past the seals, damage the seals, cause leakage into other components, trap heat, and contaminate the bearing environment. Open and sleeve bearings are built for lubrication through the appropriate channels, and any lubrication method used for them would not apply to sealed bearings in the same way. So the best choice is the sealed bearing, since it should not be re-lubed.

Sealed bearings are designed as maintenance-free units with lubricant sealed inside by tough seals. They’re not meant to be re-lubed. Pumping grease into one can push lubricant past the seals, damage the seals, cause leakage into other components, trap heat, and contaminate the bearing environment. Open and sleeve bearings are built for lubrication through the appropriate channels, and any lubrication method used for them would not apply to sealed bearings in the same way. So the best choice is the sealed bearing, since it should not be re-lubed.