... length:190-1800mm 2,idler diameter:60-159mm 3,roller material:uhmwpe,hdpe,steel,nylon 4,seal: ... to 1, 800mm Bearing Single and double row deep groove ball bearing 2RZ and 2Z with C3 ... .11% mortar method abrasion rate(400RPM,8 hours) 0.2% impact strength 250KG/M2 tensile strength 64 MPA ... more than 30000 hours2,Samples for testing are available.3, minimum revoiving resistance4, small maintain work 5, high ...