Working Principle of Lightning-Serrated Belleville Washers

1. Elastic Support Foundation

After the nut is tightened, the conical washer gets flattened and stores elastic potential energy through deformation. It offsets thread clearance continuously and restricts nut displacement triggered by vibration. Ordinary flat washers carry no elasticity and cannot compensate for gaps, which constitutes the core advantage of Belleville washers.

2. Anti-Loosening Lock-in From Radial Serrations

Radial inclined teeth on the washer surface slightly embed into the contact faces of nuts and workpieces, greatly raising the friction coefficient. When vibration tends to rotate and loosen the nut, the biting resistance of serrations counteracts the loosening torque and stops nut rotation via static friction force.

3. Shock Absorption Through Elastic Deformation

Bolts tend to lose pre-tightening force under mechanical impact and thermal expansion-contraction. The conical structure automatically fills tiny gaps by rebound force, sustains clamping pressure for a long-term period and eliminates connection backlash.

Lightning-serrated Belleville washers are primarily applied to connections for medium-strength and high-strength bolts and screws. The washer stores elastic potential energy after compressive deformation. Once bolts turn loose, the washer releases potential energy to maintain sealing pressure for flange joints. Its special surface texture improves the friction coefficient for reliable anti-loosening and self-locking performance. Thanks to its distinctive conical structure, the washer bears heavy loads within limited installation space. It is widely adopted across the machinery industry for bolt-and-screw fastener assemblies.