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Safety Wheel Nut from Disc-Lock

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A correctly fitted Disc-Lock Safety Wheel Nut from Disc-Lock eliminates the risk of wheel loss.

It is estimated that there are between:

  • 3 - 7 fatal accidents
  • 150 – 400 wheel detachments
  • 7,500 – 11,000 wheel fixing defects each year in the UK alone.

There is sufficient evidence that this problem exists in other countries.

The UK has a Heavy vehicle population (over 4.5 tonnes) of around 500,000. In the 2002 Motor Vehicle Census Australia had a similar heavy vehicle population of 405,388.

Why do Wheel Nuts loosen?

The main reason for wheel loss is incorrect clamping pressure on the wheel nut. This can be caused by many reasons: incorrect calibration at fitting, loosening over time, rust, dirt or paint in between the nut and the wheel surface, damage to the stud.

The bottom line being the current design (fitting wheels to trucks) is not a maintenance free design and does require very careful handling.”

So how can these fatalities are prevented?

Wheel loss reduction requires either a rigorous maintenance regime involving - daily checks, trained personnel with calibrated torque wrenches and thorough record keeping that can be supplemented by nut movement indictors or eliminate the risk of wheel loss with the Disc-Lock Safety Wheel Nut.

The Disc-Lock Safety Wheel Nut works by the interaction of an interlocking cam. As the angle of the cam is greater than the pitch of the tread on the stud, a wedging action takes place and the clamp load is maintained.

Disc-Lock Safety Wheel Nuts are fitted the same as a conventional wheel nut. There are currently 30,000 Disc-Lock Safety Wheel Nuts sold per month in the UK and used by many road transport companies overseas, including Fed EX US, Asda UK, Shell Denmark.

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