Common challenges related to
threaded fasteners in a gearbox
Apparent causes behind these challenges
- Vibrations
- Thermal fluctuations
- Tough operating conditions
Root Cause
There are gaps between engaging threads, with only 15% metal to metal contact, while the rest of the 85% is air. This air gap allows
- Vibration to cause side-to-side motion leading to self-loosening
- Differential expansion and contraction of substrates due to service temperature changes
- Corrosive environment to attach the metal fasteners
loctite solution
Loctite 243
Medium strength threadlocker that fills all the gap between the engaging threads and solidifies to unitize them, thereby
- Preventing self-loosening
- Sealing against corrosion
Results
- Correct clamp load is maintained
- Easy and consistent
disassembly - Proper gearbox reliability ensured