4 MMD Sizer Designation T he dif er en t models of MMD Siz er ar e desig na t ed b y the distanc e in millimetr es bet w een the c en tr e line of the t w o r ot ors , the t ooth c onfgur a tion ftt ed t o the r ot ors , the ef ec tiv e length of the inlet opening and the dir ec tion of shaf t r ota tion. Centre Dis t ance Length of Inlet In w ar d Running Outw ar d Running T he c en tr e distanc e c ombined with the t ooth c onfgur a tion c on tr ols the maximum siz e of inf eed ma t er ial tha t the unit can pr oc ess efcien tly . T he length of the inlet has a major ef ec t on the v olume of ma t er ial tha t the unit can pr oc ess . I n w ar d running is the nor mal method of oper a tion f or most t ooth c onfgur a tions and must be used on w et stick y ma t er ials . On sec ondar y and t er tiar y Siz ers , out w ar d running can be used on c er tain ma t er ials t o pr oduc e a smaller pr oduc t than is possible when running in w ar ds . 500 S eries 625 S eries 750 S eries 1000 S eries 1300 S eries 1500 S eries Sizer Series Com parison T ypical dimensions f or the r ange of MMD Siz ers ( A ll dimensions ar e in millimetr es)