Sieve shakers operate with both 8″ and 12″ sieves. They provide consistent agitation to samples, improving accuracy, passage of particles, and overall consistency between tests. Agitation lifts particles off of the sieve cloth to reorient them and allow many opportunities to pass through sieve openings. Automatic sieve shaking offers consistent and repeatable separations compared to manual sieve shaking methods for particle sizing. Mechanical tapping shakers feature aggressive circular actions, enhanced by the repetitive two-way tapping of the sieve stack. Rotary sifters rotate at an angle as multiple hammers tap against sieves to promote particle passage. Orbital sieve shakers mimic the motion of hand sieving and are an affordable choice for free-flowing material. Vibratory shakers are quiet and use electromagnetic energy to agitate particles.