Millwright Level 1 Practice Exam

What should be done when using a puller or press to remove a bearing from a shaft?

1. Inspect and clean the shaft area

2. Heat the bearing

3. Lubricate the shaft

4. Apply pressure gradually

The correct answer is: Inspect and clean the shaft area

When using a puller or press to remove a bearing from a shaft, the practice of inspecting and cleaning the shaft area is essential for several reasons. Ensuring that the area is free from dirt, debris, and corrosion can significantly reduce the risk of damage to both the bearing and the shaft during the removal process. Inspecting the shaft allows you to identify any wear, pitting, or other issues that may complicate the removal of the bearing. Cleaning the area prepares it for a smoother operation, promoting a more efficient and effective removal process. This step also helps in preventing contamination of the new bearing when it is installed. While other methods, such as heating the bearing or applying pressure gradually, may have their uses in different contexts, they do not address the foundational need for cleanliness and inspection that directly impacts the success and safety of the removal process.