托辊是带式输送机的重要部件，种类多，数量大。它占了一台带式输送机总成本的35％，承受了70％以上的阻力，因此托辊的质量尤为重要。
　　托辊的作用是支撑输送带和物料重量。托辊运转必须灵活可靠。减少输送带同托辊的摩擦力，对占输送机总成本25％以上的输送带的寿命起着关键作用。虽然托辊在带式输送机中是一个较小部件，结构并不复杂，但制造出高质量的托辊并非易事。
DTIIA上托辊组 30 35 45带宽辊子AEH1H2PQd质量kg图号DLRKM-RS/LS/NS轴承C335。45。35。45。35。45。50089200RS89-204-2006204740800135.5298328170130M14161750C31450C31565089250RS89-204-2506204890950135.5327364170130M12181965C31465C315108RS108-205-2506205146346381222265C41465C41580089315RS89-204-315620410901150135.5364410170130M12222380C31480C315108RS108-205-3156205146383427272880C41480C415133RS133-305-3156305159.5407455333580C51480C5151000108380RS108-205-380620512901350159437487220170M163841100C414100C415133RS133-305-3806305173.54615154649100C514100C5151200108465RS108-205-465620515401600176502564260200M165154120C414120C415133RS133-305-4656305190.55275926063120C514120C515159RS159-306-4656306207.55566187376120C614120C6151400108530RS108-205-530620517401800184548618280220M165668140C414140C415133RS133-305-5306305198.55736466677140C514140C515159RS159-306-5306306215.56026728893140C614140C6151600133600RS133-306-600630619802050212.5629721300240M16105107160C614160C615159RS159-306-6006306225.5653734114117160C714160C715RS159-307-6006307121123160C814160C8151800133670RS133-306-670630621802250212.5670770340270M16115120180C614180C615159RS159-308-6706308225.5693783139141180C714180C715194RS194-307-6706307247714805161164180C814180C8152000159750RS159-308-750630824202500235.5749850