Bearing crush provides

• A. Increased misalignment
• B. Proper fit
• C. Excessive clearance
• D. Improved bearing cooling

Answer: (B)

Bearing crush is the intentional deformation that creates an interference fit when a bearing is pressed into a housing or onto a shaft. This preload grips the bearing firmly, holding it in place and ensuring it seats squarely and remains aligned during operation. In other words, the crush provides a proper fit by eliminating looseness and preventing movement that could cause misalignment. If there were no crush, you’d have excess clearance and wobble; if there were too much crush, you’d over-stress the races. Cooling isn’t the purpose of crush—it’s about achieving the correct, stable fit.