The M200 Miniature Laboratory Sieve Shaker, is an. The M200 Sieve Shaker, is an economical, compact, and portable vibrating shaker,, By utilizing an electromagnetic drive and natural rubber spring mounts,, VIBRATIONS PER MINUTE 50HZ /60HZ, PRODUCING 2 MM HORIZONTAL ORBITAL THROW AND 3 MM VERTICAL THROW, MILLING EQUIPMENT.