CENTRIFUGAL DRIERS The second line comprises the WD and CD centrifugal driers that, being generally more robust and less delicate, are more suitable to dry metal and plastic parts. They are intended for parts that are not particularly delicate and for items that may have small blind holes. Bulk drying is carried out by centrifuging using a forced hot air flow. VIBRATING DRIERS Fast driers with continuous cycle suitable to dry metal parts of all shapes. Although these machines can be virtually used to dry parts of all sizes, they are generally more suitable for "small" rather than "large" items. Batch drying is carried out on a "bed" of corn granules that are pre-heated by means of reinforced resistances.