Ball mills have been used for decades to grind and mix materials used in the ceramic industry. SHIMPO's heavy duty ball milling machines enable very precise milling, in porcelain jars, even for relatively tough materials, wet or dry. Shimpo ball mills have a compact design that is ideal for small-scale production and is constructed using powder-coated steel for long-lasting durability. The PTA-01 accommodates one jar, the PTA-02 can handle two jars. Easy adjustments can be made to the sturdy roller bars to accommodate jars from 1-liter to 10-liters. Each milling machine comes standard with a breaker switch.