Efficiency of Small Machine Elements
Friction and efficiency in bearings and roller chains.
Typical efficiencies of well lubricated small machine elements:
- ordinary bearings : 95 - 98%
- roller bearings : 98%
- ball bearings : 99%
- spur gears with cut teeth including bearings : 99%
- bevel gears with cut teeth including bearings : 98%
- belts : 96 - 98%
- high-class silent power transmission chain : 97 - 99%
- roller chains : 95 - 97%
- bicycle derailer : 87 - 97%
- bicycle gear hub : 86 - 95%
