eljay roller cone rc 36. Flat Belt Conveyor Design Formula From Nigeria. Research paper design and selecting the proper belt width b 1850 mm capacity c 800 900 tph lift of the material h 5112 m length between centers l 29m belt speed v 12 ms troughing angle 35 0 conveyor inclination 1036 0 take up travel 600 mm type of take up screw 5 design of belt conveyor the design of the belt.