... idler has the ideal static and dynamic balance. We adopt labyrinth sealing to prevent the corrosion of the impurity, the water ... type , Including TK , TKII, DTII . All the sealing use double labyrinth nylon sealing. The bearing use SKF, NSK, HRC, LYC,ZWZ ... disc return idler roller,self cleaning idler roller,comb roller,ball bearing rubber idler roller