CWEA Maintenance Technologist Practice Test

What tool is commonly used to install tight fitting bearings?

1. Hammer

2. Screwdriver

3. A stationary hydraulic press

4. Pneumatic impact wrench

The correct answer is: A stationary hydraulic press

The correct answer, a stationary hydraulic press, is commonly used for installing tight-fitting bearings because it provides controlled, even pressure to the bearing. This is crucial because applying too much force too quickly can damage the bearing or the housing, while an insufficiently applied force may result in improper seating. A hydraulic press is designed to exert a significant amount of pressure gradually, which is ideal for these applications. Additionally, the use of a hydraulic press minimizes the risk of misalignment during installation, ensuring that the bearing is seated properly and functions efficiently in its intended application. The precision and control provided by this tool are essential for maintaining the integrity of both the bearing and the components it interacts with. In contrast, while a hammer might be considered for some bearing installations, it lacks the precision and control necessary for tight fittings, increasing the risk of damage. A screwdriver is not designed for this purpose at all and would not provide the appropriate force or alignment. A pneumatic impact wrench is typically used for quicker, high-torque applications like removing bolts rather than for the careful attentiveness needed when installing bearings.