A ll dimensions ar e in millimetr es , and ma y v ar y dependan t upon c onfgur a tion 16 The MMD 1 500 Series T win-Shaf t Sizer T he 1500 ser ies Siz er w as frst supplied t o oper a t e within the oil sands industr y in Nor ther n C anada t o facilita t e the swit ch t o shor t haul truck and sho v el e x tr ac tion, which pr o v ed t o be a sig nifcan t ec onomic impr o v emen t o v er the tr aditional sy st ems pr eviously emplo y ed . T he 1500 ser ies Siz er is pr esen tly the highest capacit y unit a v ailable , but desig n studies ar e under w a y f or higher t onnage capable Siz ers in the futur e . T he high r eliabilit y , lo w w ear and lo w main t enanc e c osts ar e alw a y s key f ea tur es in an y mining oper a tion, but ar e crucial in this abr asiv e , hostile en vir onmen t , wher e the oper a tion runs 24 hours per da y . V ar ying the inlet length allo w s changes in capacit y t o suit the applica tion. A t ypical 3 t ooth machine , with t win 400 kW dr iv es has an appr o xima t e mass of 160 t onnes . O v erbur den | C olombia | I n: R OM | O ut: -450mm | C apacit y : 20,000TPH K imberlit e | S outh A frica | I n: 2,000mm | O ut: -300mm | C apacit y : 800TPH