Using which tool to install a bearing on a shaft results in even pressure on the bearing race?

• A. An arbor press
• B. Hammer
• C. Pliers
• D. Wrench

Answer: (A)

The idea is to apply a uniform, controlled axial force to seat the bearing without causing misalignment or damage. An arbor press does exactly that: it delivers a steady, straight-line push with a flat contact surface, letting the inner (or outer) race slide onto the shaft evenly. This even pressure prevents cocking, race deformation, or indentations that could occur if force is applied unevenly. In contrast, a hammer delivers localized, impulsive blows that can distort the race; pliers apply irregular gripping pressure, which can damage the race or bore; and a wrench applies torque rather than seated, even pressure. Using an arbor press with proper alignment and clean, lubricated components ensures a safe, accurate installation.