Watch danger
29th November 1986, Page 88
29th November 1986
Page 88
Page 88, 29th November 1986
— Watch danger
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• Rubery Owen-Rockwell is warning service centres and operators about a new supply of "potentially very dangerous" wheel bolts and nuts believed to be made in Taiwan.
Grahame Ranger, manager of the company's parts and accessories division, says: "Investigations show that the bolts, M22 x 1.5, had a performance in terms of surface hardness of between 46 and 58% compared to our original parts, and the core hardness averaged only 61% — very poor findings.
"When the assembly was tested, the bolt initially stretched, and when at only 80% of the recommended torque it became impossible to apply any more torque as it started to rotate in the hub.
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Grahame Ranger