A pair of washers for maximum safety
Nord-Lock bolt securing solutions consist of a pair of washers with cams facing each other and serrations gripping the mating surfaces. They use cam-geometry to effectively prevent the bolt from vibrating loose.
Tension prevents bolts from rotating loose
Think of the bolt as a spring. Turning the fastener during tightening stretches the bolt like a spring, creating the required clamp load to hold the parts together. Nord-Lock washers secure bolted joints by increasing this clamp load if the bolt tries to rotate loose.
How it works
When the fastener is tightened, the cams lock and the serrations on the outer faces of the washers grip into both the fastener and the clamped part, creating clear impression marks in both. Clamping load has been created by the bolt, keeping the assembly locked in place.
Because the cam angle "a" is greater than the thread pitch "ß" a wedge-locking effect secures the fastener against rotational loosening, even under the most severe conditions.
When the fastener is tightened, the cams lock and the serrations on the outer faces of the washers grip into both the fastener and the clamped part, creating clear impression marks in both. Clamping load has been created by the bolt, keeping the assembly locked in place.
Because the cam angle "a" is greater than the thread pitch "ß" a wedge-locking effect secures the fastener against rotational loosening, even under the most severe conditions.
