How to select roller length for gravity roller conveyor?

1).In case of straight roller conveyor.

        Roller length (W) ≥ conveying product width (W1) +50mm
        If conveying product’s bottom is flat and hard, it can be conveyed by overhanging,
        in this case, please select roller length (W)=conveying product width(W1)*70~80%.

    2).In case of curve roller conveyor.
                                                    
        In this case, roller length is decided by conveying product length and width.
        Roller length (W) ≥ conveying product width (W1) +50mm+0.15*L

    3).In case of conveying heavy pallet.
       
        We suggest to use double or triple tracks’ roller conveyors.