Rolling mill comprising: - a holding cage comprising two pairs of uprights spaced apart from each other at the two ends of the cage, at least two uprights of the same pair defining an access window, - two working rolls, able to grip a strip to be rolled, two support rolls and two intermediate rolls, the support rolls the intermediate rolls being rotatably mounted at their ends on chocks, - lateral support rolls able to support the working rolls laterally, each lateral support roll being borne by a support arm, mounted pivoting about an axis, - load spreading beams extending between the corresponding uprights of each pair, and means for applying a preload to each support arm, intended to engage with one of the support arms at a support surface, and comprising at least one preload cylinder secured to one of the load spreading beams, - one or more spray nozzles for a lubricating/cooling fluid, and wherein at least one of the nozzles is carried on one of the support arms and wherein the fluid supply circuit for said at least one nozzle comprises a device for connection/disconnection comprising: - a pipe of the support arm, intended to channel fluid, having a supply opening that opens on the outer surface of the support arm located on the side of the means for applying a preload force, - a hollow connector, movable with respect to the holding cage, movable under the action of an actuator capable of producing a sealed connection with the supply opening on the outer surface in a first connection position or, by contrast, retracting into a second disconnection position away from the outer surface, characterised in that said actuator is an actuator separate from the cylinder of said means for applying a preload force. - a holding cage comprising two pairs of uprights spaced apart from each other at the two ends of the cage, at least two uprights of the same pair defining an access window, - two working rolls, able to grip a strip to be rolled, two support rolls and two intermediate rolls, the support rolls the intermediate rolls being rotatably mounted at their ends on chocks, - lateral support rolls able to support the working rolls laterally, each lateral support roll being borne by a support arm, mounted pivoting about an axis, - load spreading beams extending between the corresponding uprights of each pair, and means for applying a preload to each support arm, intended to engage with one of the support arms at a support surface, and comprising at least one preload cylinder secured to one of the load spreading beams, - one or more spray nozzles for a lubricating/cooling fluid, and wherein at least one of the nozzles is carried on one of the support arms and wherein the fluid supply circuit for said at least one nozzle comprises a device for connection/disconnection comprising: - a pipe of the support arm, intended to channel fluid, having a supply opening that opens on the outer surface of the support arm located on the side of the means for applying a preload force, - a hollow connector, movable with respect to the holding cage, movable under the action of an actuator capable of producing a sealed connection with the supply opening on the outer surface in a first connection position or, by contrast, retracting into a second disconnection position away from the outer surface, - a pipe of the support arm, intended to channel fluid, having a supply opening that opens on the outer surface of the support arm located on the side of the means for applying a preload force, - a hollow connector, movable with respect to the holding cage, movable under the action of an actuator capable of producing a sealed connection with the supply opening on the outer surface in a first connection position or, by contrast, retracting into a second disconnection position away from the outer surface,