Abstract: A screwdown is replaceably inserted in the window of a rolling mill housing between a bearing chock and a surface defining the window of the housing. The screwdown which is provided for each of the pair of rolling mill housings includes a screwdown housing carrying a nut member which receives a screw which is locked against rotation by a lock plate supported by the screwdown housing. Gear teeth are formed on the outer cylindrical surface of the nut and these teeth mesh with the teeth of a worm gear on a shaft which is supported by the screwdown housing for rotation. The shaft of one screwdown housing is coupled to a torque shaft which extends through and supported by the other screwdown housing. The shafts are releasably locked together for synchronous or independent rotation.

Abstract: Apparatus at the operator's side of a rolling mill is used to move the chock for one of a pair of rolls in an axial direction thereof for alignment between roll pass openings in the bodies of the pair of rolls. The apparatus includes a chock extension sleeve having an externally-threaded surface and a flange at one end attached by bolts to the roll chock at the operator's side. Two nut members are jammed together under sufficient torque for a stressed engagement with the threaded surface of the sleeve. The nut members are joined together by a threaded bolt for simultaneous rotation of the nut members. Gear teeth are formed on an outer annular section of one of the nut members to mesh with a pinion gear rotatably supported by a clevis forming part of the keeper blocks supported by the mill housing.