### Selection of Crushing rolls Derivation of the angle of nip

With this equation, theroll diametercan be determined by knowing values of thesizeof feed,sizeof product andangle of nip. • If α = 16 o , then cos α = 0.961 and we have 0.961 = (r + d)/(r + R) … (2.15) • Crushing rolls are widely used for crushing of oil seeds and in the gun powder industry.

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