Machine Design - Mechanical Engineering Questions and Answers

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In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where Î¼ = Coefficient of friction between the blocks and the drum, Î¸ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks)

$\frac { T_1 } { T_2 } = \mu \theta \times n$