🔍 Key Concepts

• Locational interference fit – a fit with a small interference, just enough to accurately locate parts without heavy force • Difference between shaft diameter and hole diameter in figures A, B, and C (.245, .250, .255 vs .250 hole) • How changing shaft size or hole size affects whether you get clearance, line‑to‑line, or interference

💭 Think About

• For each figure (A, B, C), calculate: shaft diameter minus hole diameter. Which one is currently clearance, which one is line‑to‑line, and which one is strong interference? • A locational interference fit is usually a light interference fit. Which option moves the existing dimensions toward a slight interference rather than a big interference or a clearance? • Look at each answer: does it increase or decrease the difference between shaft and hole? Does that move you toward or away from a small interference?

✅ Before You Answer

• Be clear on which figure already has the shaft larger than the hole and by how much • Check which option would result in the shaft being only a few thousandths larger than the hole, not eleven thousandths • Eliminate any answer that would obviously create a clearance fit (hole larger than shaft) or relies on unrealistic methods (like excessive force)