Norbar emphasises need for good bolting practice 09 May 2013

CV operators are being warned that wheel nut movement indicators and nut locking devices are no substitute for good bolting practice, including the correct application of torque to wheel bolts.

The advice, from Norbar Torque, is aimed at increasing awareness of torque problems on commercial vehicles and promoting better control.

According to Brake, the road safety charity, runaway wheels kill eight to 10 people and injure many more each year in the UK.

Norbar Torque is concerned that this issue is not being given due attention by the road haulage and public service vehicle industries, where "speed and low cost seem to be the most important factors in wheel bolting".

Philip Brodey, a specialist in torque at Norbar Torque Tools, accepts that there is a place for plastic wheel nut movement indicators and nut locking devices s, but insists operators should do more.

"The indicators and locking devices are not a substitute for good bolting practice, which includes ensuring that the threads are undamaged, clean and free from rust and paint," he explains.

"Vehicle manufacturers' recommendations for thread lubrication should be strictly adhered to and the correct torque should be applied using a calibrated torque tool."

John Challen

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