🔍 Key Concepts

• Journal bearing construction – understand how a split (upper and lower) bearing shell supports the shaft • Bearing shell vs. housing – distinguish the thin replaceable shell from the massive support casting • Orientation in the drawing – picture where “top” and “bottom” of the bearing would actually be when installed

💭 Think About

• Look carefully at where the arrow marked X is pointing: is it indicating solid metal that is present, or an empty area where a part would normally sit? • In a split bearing, which part is usually removed first for inspection – the upper or lower – and how would that be drawn in a sectional illustration? • Compare the regions pointed to by X and Y: which one is clearly a solid bearing surface in contact with the shaft, and which one looks different in shading or outline?

✅ Before You Answer

• Verify which areas in the figure are solid bearing material (often shown with a uniform color or hatch) versus space or clearance (often blank or lightly shaded). • Confirm in your own mind where the upper bearing half and lower bearing half would sit relative to the shaft centerline and the machine’s base. • Before choosing, be sure you can explain to yourself what the term “bearing shell space” would mean in this sectional view, and whether X is showing that or an actual piece of metal.