Rolling mill comprising: - a retaining stand comprising two pairs of posts separated from each other at the two ends of the stand, at least two posts of the same pair defining an access window, - two working rollers, able to surround a strip to be rolled, two bearing rollers, and two intermediate rollers, the bearing rollers and the intermediate rollers being mounted rotating at their ends on chocks, - side bearing rollers, able to laterally support the working rollers, with each side bearing roller being carried by a support arm, mounted pivoting on an axis, - load distribution beams extending between the corresponding posts of each pair, and means for applying a preload force on each support arm, intended to engage with one of the support arms on a bearing surface, and comprising at least one preload cylinder integral with one of the load distribution beams, - one or several spraying nozzles for a lubricant/cooling fluid, characterised in that at least one of the nozzles (12, 12'), is embedded on one of the support arms and wherein the fluid supply circuit of said at least one nozzle (12, 12') comprises a connection/disconnection device comprising: - a duct of the support arm, intended to channel the fluid, having a supply opening exiting on the bearing surface of the support arm intended to engage the means for applying a preload force, - a hollow portion, mobile in relation to the load distribution beam, which can be moved in relation to said load distribution beam under the action of said means for applying a preload force, able to form a sealed connection with the supply opening on the bearing surface in a first position of connection, or on the contrary retract into a second position of disconnection, at a distance from the bearing surface. - a retaining stand comprising two pairs of posts separated from each other at the two ends of the stand, at least two posts of the same pair defining an access window, - two working rollers, able to surround a strip to be rolled, two bearing rollers, and two intermediate rollers, the bearing rollers and the intermediate rollers being mounted rotating at their ends on chocks, - side bearing rollers, able to laterally support the working rollers, with each side bearing roller being carried by a support arm, mounted pivoting on an axis, - load distribution beams extending between the corresponding posts of each pair, and means for applying a preload force on each support arm, intended to engage with one of the support arms on a bearing surface, and comprising at least one preload cylinder integral with one of the load distribution beams, - one or several spraying nozzles for a lubricant/cooling fluid, - a duct of the support arm, intended to channel the fluid, having a supply opening exiting on the bearing surface of the support arm intended to engage the means for applying a preload force, - a hollow portion, mobile in relation to the load distribution beam, which can be moved in relation to said load distribution beam under the action of said means for applying a preload force, able to form a sealed connection with the supply opening on the bearing surface in a first position of connection, or on the contrary retract into a second position of disconnection, at a distance from the bearing surface.