MartyNZ Posted March 17 Report Share Posted March 17 1 hour ago, p6x said: Guzzi should have computed the shear force that load bearing component would be submitted to. Usually, you send the blue prints to a specialized company and they tell you what force that component will have to sustain. That bolt should have been manufactured to precise specifications, using a given metallurgy and maybe thermal treatment. Guzzi would have ordered a large batch to support manufacturing. The important factor is that, the shearing strength seems inadequate for a normal usage. For such an important component, it would be probably better to have one purpose made; if we knew what the maximum shear force it has to see. Actually we can be certain that Guzzi calculated the shear strength required correctly. If the bolt failed in shear, then we would see 2 shear planes, as the bolt is in a double shear clevis. Since the bolt usually fails under the head, or at the first thread on the shank, failure is likely caused by stress corrosion cracking or fatigue. These conditions can lead to a break at very low loads compared to simple shear. We have to stop the rust, as a rust pit is the initiation point for a crack. I believe that a new standard bolt assembled with anti-corrosion jointing compound will last a other 20 years. 1 1 Link to comment Share on other sites More sharing options...
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