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Topic Date User

Cam failure discussion 24-Apr-2015 At 12:00:26 PM Macciza

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Cant agree Patto - look at the equations at the end of the standard cam models for parallel vs flared cracks. As the flare approaches the cam angle more friction is require to hold it . Where do you get the 2x figure from?
Are you suggesting that deformation is the main reason cams fail in flared cracks?

Back on topic, some of the variables for a cam to hold include the angle of the cam, and the material that the cams are made from (and finish etc), This will account for varying results for different brands in identical conditions. Different materials and finishes have different frictional, compressive and shear strengths, as do the rock they are placed in. Basically BrandX may work perfectly well where BrandY would simply fail.
These factors may account for much of the variance between peoples experience.