When removing ball or roller bearings from...

🔍 Key Concepts

• How ball or roller bearings are mounted on a shaft and why they can be easily damaged by shock loads • The difference between tools that apply direct impact (hammers/mallets) and tools that apply a steady pulling force • Proper maintenance practice to avoid brinelling or deforming bearing races and balls/rollers

💭 Think About

• Which of these tools lets you remove a tightly fitted part from a shaft by applying an even, controlled force rather than sudden blows? • Which choices would tend to put side pressure on the bearing or require prying against delicate surfaces? • In good marine engineering practice, what is the safest way to protect both the shaft and the bearing surfaces during removal?

✅ Before You Answer

• Identify which option is specifically designed to grip a part on a shaft and pull it off evenly • Eliminate any tools whose main purpose is striking or prying, not pulling • Ask yourself: which tool would a mechanic use to remove pulleys, gears, or bearings from a shaft without damaging them?

When removing ball or roller bearings from the shaft of a motor, what tool should be used?

rawhide hammer

brass mallet

wheel puller

soft iron pry bar