Interference fit

An interference fit is a fancy way of saying that two things are stuck together really hard without using glue or anything else. It's like when you put a puzzle piece into the puzzle and it fits so snugly that it won't fall out even if you turn the puzzle upside down.

Imagine you have a toy car with wheels that come off easily. You want to make sure the wheels stay on, even if you push the car around really hard. You could use glue to stick the wheels on, but that would be messy and makes it hard to repair the car if something goes wrong. Instead, you can make the hole where the wheel fits really tight so that the wheel can't fall off. This is called an interference fit.

It's kind of like when you wear tight shoes that don't fall off even if you run and jump. The shoe is snugly fitting onto your feet so it can't slide off.

Interference fit is a technique that engineers use to make sure that different parts of machines fit tightly together without falling apart. They can use this technique to make sure that all the parts of engines, airplanes, or cars fit tightly together without using glue or other material.

So, think of interference fit as a super tight high-five that two different things give to each other to stay together very tightly without any outside help.