Statics › Section I · Friction › Topic I.6
Journal bearings
Every hinge, pivot pin and axle that turns in a plain hole fights friction. Statics can predict exactly how much moment that friction resists, using one neat geometric idea: the friction circle.
In this topic
- Shafts in plain bearings
- The shaft climbs the bearing
- The friction circle
- The moment friction resists
- A method for bearing problems
- Worked example: a shaft under load
- Fixed shaft, rotating hub
- Worked example: a pulley on a fixed axle
- Common mistakes to avoid
- Key takeaways
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