Brochure

The blame is normally placed on the driver when a wheel

falls off its axle, even though conventional wheel nuts lack

a locking function. While many drivers and ﬁrms have not

experienced wheel detachment in the course of their work,

unbalanced wheels due to loosening wheel nuts are a

common occurrence. The result is not only increased costs but

also unstable driving, which can contribute to driver fatigue.

Loosening factors of wheel nuts

Safe wheel assemblies rely on high clamp load. Loss of clamp

load leads to movement between the clamped parts in the

joint, and causes rotation of the wheel nut. The phenomena

of loosening wheel nuts is a normal part of the everyday

operation of heavy vehicles – caused by one or more of the

following reasons.

• Poor road conditions

• Vibration

• Poor tightening technique or tools

• Joint relaxation

• Braking and acceleration

• Human errors during assembly

• Thermal expansion and contraction of wheel bolts

• Unbalanced wheels

• Increased vehicle speed

• Oil leakage from axle onto wheel nuts without

locking function

Regular wheel nuts do not have a locking feature and may

therefore rotate loose. The Nord-Lock wheel nut safely

secures wheels on heavy vehicles.

What makes wheel

nuts come loose?

Unsecured wheel nuts affect the efﬁciency of both the driver

and the vehicle.