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Find the angle of contact for an arc on a roll having the maximum reduction equal to 2 mm and roll diameter 800 mm?

Find the angle of contact for an arc on a roll having the maximum reduction equal to 2 mm and roll diameter 800 mm? Correct Answer 2.86 degrees

The relationship between the maximum reduction in thickness and the roll diameter is: -> Δh = 2R(1-cosα) -> 2 = 2*800(1-cosα) -> Cosα=0.99875 -> α=2.86 degrees.

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