GATE MT 2020 Q12. In cold-rolling, for the sheet to be drawn into rolls, the angle of contact (or angle of bite) should be less than or equal to__–degree (round off to one decimal place). Given, the coefficient of friction between sheet and roll is 0.1

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Angle of contact: In rolling metals where all forces are transmitted through the rolls, the maximum angle that can be attained between the roll radius at the first contact and the line of roll centers.

Operating angles less than the angle of bite are called contact or rolling angles.