Abstract: The use of shafts of small diameter in profiling heads gives rise to problems of bending and of loss of adjustment. In addition, the runout of the shafts can cause them to be ejected. To remedy these problems, the invention provides anti-bending means securing together shaft adjustment and forming means. A profiling head (1) of a profiling machine includes at least one forming cassette (2) including a set of two parallel shafts (20, 30) having wheels (201 to 217; 301 to 310) separated by spacers (200; 300) mounted thereon to form rolling tooling, and a frame including uprights (41, 51) for supporting the shafts (20, 30) and a base (60), which uprights are provided with vertical adjustment means (44 to 46; 54 to 56).

Abstract: A two-roll machine, in particular a roll press, for interparticle comminution of granular material with two rotatably mounted, counter-rotating driven rolls separated from one another by a roll gap. Drive journals of the roll's shaft-mounted gearboxes are shaft-mounted as step-down planetary gear units. A machine table with a table platen is arranged under each of the shaft-mounted gearboxes that can move back and forth parallel to the roll shaft in at least one direction, and three vertically and horizontally adjustable supporting rests arranged in a triangle are arranged on the table platen on which the respective shaft-mounted gearbox can be supported offset-free and aligned with the roll shaft drive journal during its installation and removal.

Abstract: A ring mill apparatus and method utilizes at least one hydraulic or other direct drive motor to drive a roller in contact with a ring that is to be expanded by the ring mill. The motor may be two opposed radial piston hydraulic motors, to drive an upper king roller, which contacts the outside of the ring, which is inserted between the upper king roller and a lower mandrel roller, which contacts the inside of the ring. The lower mandrel roller is urged upwards against the ring by a ram driven carriage. Two hydraulic or other direct drive motors can be provided in-line with, and directly connected to, the king roller.

Abstract: Relocate the abstract to the last page of the application and replace the abstract with the following new abstract: A mill configured for a thermo-mechanical simulating test system includes a stand with a strip entry disposed thereon for feeding strips; an upper roller and a lower roller disposed on the stand; devices for axial and radial positioning of the upper roller and the lower roller; a pressure sensor for testing rolling force disposed between the stand and at least one of the upper roller and the lower roller; a strip clamp disposed corresponding to the strip entry, wherein the strip clamp is removeably connected to a first coupling head of the thermo-mechanical simulating test system; a coupling mount connected to the stand and disposed generally oppositely to the strip entry on a side of the stand, wherein the coupling mount is removeably connected to a second coupling head of the thermo-mechanical simulating test system.

Abstract: An apparatus for urging an oil film bearing onto and off of a roll neck in a rolling mill comprises an annular hydraulically actuated piston/cylinder unit mounted on a cylindrical section of the roll neck. The cylindrical neck section is delimited at one end by a circular shoulder on the roll neck, and at the opposite end by a circular groove in the roll neck. A retaining ring has lock arms pivotally movable into seated positions in the groove. The piston/cylinder unit is operable in a first mode in an abutting relationship with the lock arms to urge the bearing onto the roll neck, and is operative in a second mode in an abutting relationship with the shoulder to urge the bearing off of the roll neck. The piston/cylinder unit and the lock arms having complimentary tapered surfaces arranged to coact in urging the lock arms inwardly into their seated positions in response to the abutment of the piston/cylinder unit with the lock arms.

Abstract: In a method for bending a sheet-metal part (50) on a profile body (24) having a bending profile (52), the sheet-metal part (26, 28) is pressed against the profile body (24) at an initial contact point (54), wherein bending rollers (26, 28), starting from the initial contact point (54), press the sheet-metal part (50) along the bending profile (52) against the profile body (24) and adapt it plastically to the shape of the profile body (24). Furthermore, a bending device (22) for carrying out the method is specified.

Abstract: One of a pair of rolls of a roll stand is formed with an axially throughgoing central hole through which passes a drive shaft having a pair of ends. A coupling at one end of the drive shaft rotates same and the one roll. This one roll can be shifted, normally vertically, between a use position closely juxtaposed with the other roll and a change position spaced away from the other roll and with the roll resting on supports. An entrainment fitting on the carriage can fit with and axially connect to an entrainment element of the drive shaft in the change position of the other roll. An actuator can shift the carriage from an inner position into an outer position and thereby pull the drive shaft out of the one roll and leave the one roll resting on the supports.

Abstract: A roll stand for edgers in rolling mills. The roll stand is formed of several pieces, including two crossheads and four longitudinal bars as main components, as well as one respective common cruciform junction point for the crosshead and the longitudinal bars, which is located at the ends of the longitudinal bars. Pretensioned through bolts that act as a joint are used at least at the top ends of the longitudinal bars.

Abstract: A device for loading the guide surfaces of bearing chocks (LS) supported in the housing windows (SF) of rolling stands with pressure plates (DP) that can be placed on the guide surfaces and that can be loaded by a hydraulic piston (K) supported in the rolling stand housings (ST), wherein devices for measuring the pressure and devices (WM) for measuring the displacement of the piston are assigned to the hydraulic piston (K), and wherein the frictional force is eliminated by adjusting well-defined clearances between the bearing chocks (LS) and the guide surfaces.

Abstract: A roll stand for rolling bar-shaped or tubular stock, having a stand housing, having at least one roll which is arranged on a roll shaft rotatably mounted in the stand housing and is connected in a rotationally fixed manner to the roll shaft via a frictional connection, in which roll stand the roll is held in its axial position on the roll shaft in a positive-locking manner by sleeve elements adjoining axially with respect to the roll shaft.

Abstract: The present invention relates to a method for manufacturing a toothing on a component 2 of a shaft/hub connection, the component 2 being held permanently in a chucking 3 while it receives an at least two-stage toothing in this chucking. A special draw die 4 for carrying out the method is also proposed, a first toothing-forming region 14 with a first height and at least one following second toothing-forming region 15 with at least one second height being arranged between a first and a second end face 5, 6 and the first height being designed to be lower than the second height.

Abstract: The invention relates to a torque support on oil collecting receptacles (2, 2?) in a region of a paired connection of spindle heads and roll necks (1, 1?) in rolling mill stands during adjustment thereof in both vertical and axial directions, with a respective attachment point on both upper and lower collecting receptacles (2, 2?). The new torque support consists of a one-piece strip (3) having, in particular, a rectangular cross-section and formed of flection-resistant material, and which is pivotally connected at an upper end with the upper oil collecting receptacle (2) in a vertical plane by an articulated joint (4) and, in a region of its lower end (9), is slidably guided in the pendulum plane in formlockingly compatible opening (5) of a guide link member (6) so that the distance and the inclination angle (?) change.

Abstract: A yoke assembly for connecting and securing to each other rolls forming a nip in an extended nip press, whereby at least one of the rolls of the extended-nip press includes loading means for loading the endless-loop blanket of one roll against the other one of the extended-nip press rolls so as to establish the nip. The rolls are dismountably connected to each other and the yoke assembly includes rotatable connecting members for detachably connecting the rolls to each other by their bearing blocks. The connecting member includes a first clamping surface adapted slidably rotatable on the respective mating surface of a first roll bearing block so that the first clamping surface and the respective mating surface of the first roll bearing block to be connected therewith form a pivotal joint about which the connecting member can be rotatably disengaged from the mating surface of a second roll bearing.

Abstract: An oil film bearing is disclosed for a rolling mill roll having a tapered neck leading to a reduced diameter end section. The bearing comprises an internally tapered sleeve received in a seated position on the tapered roll neck. The sleeve is journaled for rotation in a bushing fixed within a chock assembly. A tubular piston is received on and fixed relative to the reduced diameter end section of the roll. A cylinder is internally subdivided by the piston into first and second chambers. A sleeve ring abuts an end of the sleeve and a circular thrust component is interposed between and arranged to overlap adjacent segments of the sleeve ring and the piston.

Abstract: A roll changing carriage can be displaced transversely with respect to the strip rolling stand and a removal crossbar is provided for the removal of the set of backup rolls. In order to shorten the roll changing times and to automate the changing of the rolls, the removal crossbar can be positioned on the roll changing carriage and is provided with wheels on which the removal crossbar can be moved out of the roll changing carriage on guide rails running parallel to the rolls into the strip rolling stand on the intermediate roll rails, and can be pulled out of the strip rolling stand together with the set of backup rolls.

Abstract: A rolling mill drive with at least one drive spindle arranged between a drive unit and a driven roll and terminating in a spindle head connected detachably to the neck of the roll. A coupling and decoupling device is arranged between the neck of the roll and the spindle head of the drive spindle. The coupling and decoupling device includes a coupling sleeve, a coupling pin inserted releasably into the coupling sleeve, and a locking element which is displaceable transversely to the axis of rotation of the neck of the roll. The locking element is inserted into the coupling sleeve and engages behind the coupling pin in an operating position of the locking element. The locking element is capable of being coupled to a displacing device for displacing it.

Abstract: A rolling device with at least two rolls installed in a common stand, the rolls being mounted on lateral stringers by bearings, which are able to move vertically along the lateral stringers, and with at least one axial adjusting device for one of the rolls. The axial adjusting device is directly assigned to the vertically adjustable bearings and is able to move vertically along with them.

Abstract: The invention relates to a method for changing the configuration of a rolling mill including at least two working rolls and two back-up rolls, means for applying a clamping load and two sets of hydraulic cambering cylinders, at least of both working rolls. According to the invention, at least two types of working rolls (C1, C2) are realized having, respectively a great diameter and a small diameter and the quarto configuration rolling mill is switched to a sexto configuration and conversely, the rolls with great diameter (C1, C?1) being used as working rolls in the quarto configuration and, in the sexto configuration, as intermediate rolls between each back-up roll and a roll with small diameter (C2, C?2) used as a working roll.

Abstract: Rolling device with two work rolls supported in a rolling stand by a chock and with at least two additional rolls supported in the rolling stand by an additional chock. At least one of the work rolls and at least one of the additional rolls is adjustable for adjusting a desired roll gap relative to the other work roll or relative to the other additional roll. The work rolls have axial shifting devices for axial shifting and holding the work rolls into a desired axial position relative to the rolling stand. The work rolls are operatively connected with bending devices, by which a bending moment can act on the work rolls. The axial shifting devices are arranged and act between the rolling stand and the work roll locking mechanism. The bending devices are arranged or act between the work roll chock and the chock of the additional roll.

Abstract: A method for eliminating the vibrational chatter in a rolling mill stand, whereby existing roll chocks are machined to allow commercially available thrusting means, including hydraulic cylinders and the accompanying fittings and tubing, to be installed directly into the chocks so that when activated the thrusting means thrust horizontally outward to take up any gapping or play occurring between the chock face and the mill housing during normal mill operations, thus effectively eliminating chatter.

Abstract: The invention relates to a method for detecting the vibrations of a roll stand (1) equipped with a hydraulic jack (6) as a device for adjusting the rolling rolls (4, 5). The hydraulic jack comprises a sensor (64) for measuring the position of the mobile portion relative to the fixed portion, this sensor supplying a digital signal (POS). In the method of the invention, the vibrations are detected by direct observation of the position signal (POS) and a comparison thereof relative to a spatio-temporal window (F) whose dimensions are determined as a function of the frequency to be detected. In accordance with the invention, it is possible to define different observation windows (F) suitable for the detection of different vibratory phenomena.

Abstract: A universal rolling stand with control of the space between the rolls comprises a pair of horizontal rolls and one or more vertical rolls with respective chocks, positioning housings and a guide for the chocks with adjustment tie rods (6, 7, 6?, 7?, 18, 18?, 19, 19?) anchored on one side to the housings and acting on the chocks for the adjustment and positioning of the rolls. Adjustment is performed by means of hydraulic capsules (8, 8?, 9, 9?, 20, 20?, 21, 21?) with two hydraulic chambers with dual actuation effect and a double stem at the ends of each tie rod.

Abstract: A tightening and untightening tool for a roll bearing assembly of a rolling mill has a box-shaped body of toroidal shape with a central hole fitting around the cylindrical end part of a back-up roll. It has drive keys that slide into corresponding drive splines on the outside of the locknut and a torque reaction slot that fits over a reaction plate. The tool is provided with a hydraulic drive motor for tightening with bearing locknut against a thrust bearing.

Abstract: The invention relates to a device for raising and withdrawing a bearing unit of a back-up roll of a roll stand. Said bearing unit is comprised of a piece to be inserted inside which has a roll pin bearing arranged therein. According to the invention, a change-over device is configured so that it can be temporarily coupled to the bearing unit and is provided for effecting an axial movement toward and away from the back-up roll.

Abstract: The two-piece upper work tool 20 includes a first body member 22 and a second body member 24 which are generally mirror images of each other. The body members 22, 24 include a plurality of orifices 28 therethrough. One of the body members 22 includes a plurality of elongated slots 26 with a circular shape at one end thereof. The other body member 24 has a plurality of fasteners, posts or dowels 30 extending from a surface thereof which interact and mate with the elongated slots 26 on the opposite body member 22. The body members 22, 24 include a rectangular shaped recess 32 on one end thereof and also include a plurality of pockets or cavities on inner surfaces thereof. One of the pockets includes a diameter for a back-up roller generally encompassing 360° except for a very small top portion thereof.

Abstract: The invention relates to a device which enables the actuators and consumers provided on a roll stand for rolling metallic and non-metallic strips to be supplied with operating media. The inventive device comprises a self-supporting construction module consisting of elements of variable which can be connected to each other, the height, width and depth of said elements being variable.

Abstract: Device to absorb the axial loads generated on the rolls in a rolling stand (11) having a pair of working rolls (12a, 12b), a corresponding pair of back-up rolls (15a, 15b) and at least an intermediate roll (14) located between a working roll (12a) and a corresponding back-up roll (15a), in said device holding means (16, 40, 41) are provided to support the axial loads on the back-up rolls (15a, 15b) and/or the working rolls (12a, 12b) caused by the crossing of said at least one intermediate roll (14), so that the axial loads are discharged onto elements with very low rolling friction, totally or almost totally annulling the hysteresis relating to the vertical movements of the back-up rolls (15a, 15b) and working rolls (12a, 12b) and the relative chocks (26).

Abstract: A fastening apparatus adapted for use with chock and a roll which locates within the chock such that a first end of the roll projects through and beyond a first end of the chock and a second end of the chock is located relative to the roll. The apparatus comprises a housing, a piston movably situated within the housing to allow a plurality of circumferentially spaced locating portions of the piston to be retained within the housing or to project through corresponding openings in the housing, pressure means provided within the housing to act on the piston, and at least one fastening member attached to the housing. In an operative position of the apparatus the housing is placed between the first end of the chock and the first end of the roll, and the pressure means acts between the piston, forcing the locating portions of the piston into location with the first end of the chock, and forcing the at least one fastening member into location with the first end of the roll.

Abstract: A device for holding at least one roller of a rolling machine that can rotate about a rotational axis includes two holding arrangements that can be arranged on opposite faces of the roller viewed in the direction of the rotational axis. The device further includes at least two coupling parts each configured for a coupled mode and an uncoupled mode. A first of the two coupling parts has at least one, preferably essentially straight first groove, and has a second groove that does not run parallel to the first groove. A second of the two coupling parts includes a first coupling element and a second coupling element, wherein the first coupling element projects further outward from the second coupling part than the second coupling element. In at least one implementation, the roller can be detached or removed from the holding arrangements when the holding arrangements are in uncoupled mode.

Abstract: A device to vary the positioning of a rolling roll for plane products, comprising a housing able to support the roll and the respective chocks thereof. On the crossing plane of the roll and at the two sides of every chock a drawing sector is provided for cooperating with drive means, and a transmitter element is present in an intermediate position to achieve an oscillating connection between the drawing sector and the drive means, which are associated with position transducer means and data processing means.

Abstract: A rolling mill roll stand comprises parallel roll shafts rotatably supported by axially spaced first and second bearings contained in parallel eccentric sleeves. The eccentric sleeves are rotatably supported in a housing and the roll shafts have cantilevered ends that project externally from one side of the housing and that are adapted to carry work rolls. Third oil film bearings are contained by the eccentric sleeves and are arranged to rotatably support the roll shafts at intermediate locations between and spaced axially from both the first and second bearings.

Abstract: A multi-row rolling mill has in one housing at least two groups of rolls including at least one pair of work rolls, and constructed so that when the workpiece to be rolled is passed one time, it can be rolled using said respective work rolls. The multi-row rolling mill is characterized in that it is provided with a means for removing the workpiece if the workpiece stops moving between said roll groups.

Abstract: Disassemblable rolling mill stand, of the type involving a bedplate structure with a substantially “U”-shaped embedding structure (1), within which the rolling mill assembly is embedded and fixed (2), with at least one couple of horizontal rolling cylinders (210–310), by fixing means (202-10/12), of said substantially “U”-shaped embedding structure, which extends upwards at least up to the upper horizontal cylinder axis of said couple of horizontal rolling cylinders (210–310) and makes up vertical sliding jointed guide elements (11–110) with corresponding opposite vertical counter-guides (201) in the rolling mill assembly (2).

Abstract: A screw down cylinder, an upper backup roll chock, and an upper work roll chock are pressed against an upper crosshead by hydraulic cylinders, and an upper roll cross mechanism is actuated, whereby the upper backup roll chock (upper backup roll), the upper work roll chock (upper work roll), and the screw down device (screw down cylinders) can be synchronously moved in the same direction via the upper crosshead.

Abstract: A fastening apparatus adapted for use with a chock and a roll which locates within the chock such that a first end of the roll projects through and beyond a first end of the chock and a second end of the chock is located relative to the roll. The apparatus comprises a housing, a piston movably situated within the housing to allow a plurality of circumferentially spaced locating portions of the piston to be retained within the housing or to project through corresponding openings in the housing, pressure means provided within the housing to act on the piston, and at least one fastening member attached to the housing. In an operative position of the apparatus the housing is placed between the first end of the chock and the first end of the roll, and the pressure means acts between the piston, forcing the locating portions of the piston into location with the first end of the chock, and, forcing the at least one fastening member into location with the first end of the roll.

Abstract: The roll stand having at least one roll shaft 2, which carries a roll 6 and is subdivided into sectional shafts 3, 4 for the purpose of being able to change the roll, comprises at least one labyrinth-seal arrangement which is arranged in an annular gap 23, 24 formed between the respective sectional shaft 3, 4 and a bearing device for the roll shaft.

Abstract: A tightening and untightening tool (20, 30) for a roll bearing assembly of a rolling mill, has a box-like body of toroidal shape with a central hole fitting around the cylindrical end part (6) of a back-up roll (1). It has drive keys (28) that slide into corresponding drive splines on the outside of the locknut (13) and a torque reaction slot (27) that fits over a reaction plate (14). The tool (20, 30) is provided with a hydraulic drive motor (31) for tightening the bearing locknut (13) against a thrust bearing (11).

Abstract: A rolling mill roll stand comprises parallel roll shafts rotatably supported by axially spaced first and second bearings contained in parallel eccentric sleeves. The eccentric sleeves are rotatably supported in a housing and the roll shafts have cantilevered ends that project externally from one side of the housing and that are adapted to carry work rolls. Third oil film bearings are contained by the eccentric sleeves and are arranged to rotatably support the roll shafts at intermediate locations between and spaced axially from both the first and second bearings.

Abstract: A roller system includes a frame, an upper roller assembly, a lower roller assembly and an actuator. In one embodiment, the upper roller assembly includes a first rotatably supported cylindrical member. The lower roller assembly is movably supported by the frame below the upper roller assembly and includes a second rotatably supported cylindrical member. The actuator is configured to move the second cylindrical member between an elevated position and a lowered position. In another embodiment, the roller system includes a frame, at least one upper track, an upper roller assembly, at least one lower track and a lower roller assembly. The upper roller assembly includes a first rotatably supported cylindrical member extending along an upper axis. The upper roller assembly is supported by the upper track and moves along the upper axis between an operation position and a removed position. The lower roller assembly includes a second rotatably supported cylindrical member extending along a lower axis.

Abstract: A rolling mill, a gap-removing apparatus for roll bearing boxes, a rolling method, a modifying method for a rolling mill, and hot finish tandem rolling equipment are provided with roll bearing boxes for rotatably supporting work rolls in a housing, a first pushing device for applying a vertical balancing force or bender force to the work rolls through the roll bearing boxes, and a second pushing device for applying a pushing force in a direction orthogonal to the work roll axis in a horizontal plane to the roll bearing boxes. The first pushing device and the second pushing device are disposed to be offset from each other in the work roll axis direction. In certain arrangements, the second pushing device is disposed between a plurality of the first pushing devices in the work roll axis direction. Gaps at the roll bearing boxes in the rolling mill can be removed without enlarging the equipment in size.

Abstract: In a cluster type split housing type rolling mill, the plate thickness control capability is improved by maintaining maximum mill rigidity. An upper inner housing supporting an upper group of rolls is supported at two points in a rolling pass direction at upper outer housing sections. A lower inner housing supporting a lower group of rolls is supported at a single point in the rolling pass direction at lower outer housing sections. The upper and lower housings have different levels of vertical rigidity.

Abstract: The invention relates to a device which enables the actuators and consumers provided on a roll stand for rolling metallic and non-metallic strips to be supplied with operating media. The inventive device comprises a self-supporting construction module consisting of elements of variable which can be connected to each other, the height, width and depth of said elements being variable.

Abstract: Device to absorb the axial loads generated on the rolls in a rolling stand (11) having a pair of working rolls (12a, 12b), a corresponding pair of back-up rolls (15a, 15b) and at least an intermediate roll (14) located between a working roll (12a) and a corresponding back-up roll (15a), in said device holding means (16, 40, 41) are provided to support the axial loads on the back-up rolls (15a, 15b) and/or the working rolls (12a, 12b) caused by the crossing of said at least one intermediate roll (14), so that the axial loads are discharged onto elements with very low rolling friction, totally or almost totally annulling the hysteresis relating to the vertical movements of the back-up rolls (15a, 15b) and working rolls (12a, 12b) and the relative chocks (26).

Abstract: A device to vary the positioning of a rolling roll (10) for plane products, comprising a housing (12) able to support the roll (10) and the respective chocks (11) thereof. On the crossing plane of the roll (10) and at the two sides of every chock (11) a drawing sector (14a, 14b) is provided for cooperating with drive means (17a, 17b, 18a, 18b), and a transmitter element (22) is present in an intermediate position to achieve an oscillating connection between the drawing sector (14a, 14b) and the drive means (17a, 17b, 18a, 18b), which are associated with position transducer means (19a, 19b) and data processing means (21).

Abstract: A fastening apparatus adapted for use with an annular first article and a second article which locates within the first article such that a first end of the second article projects through and beyond a first end of the first article and a second end of the first article is located relative to the second article. The apparatus comprises a housing, a piston movably situated within the housing to allow at least one locating portion of the piston to be retained within the housing or to project through a corresponding opening in the housing, pressure means provided within the housing to act on the piston, and at least one fastening member attached to the housing.

Abstract: In a rolling method applied to a multi-roll strip rolling mill composed of not less than four rolls, one of the zero point of the roll positioning devices and the deformation characteristic of the strip rolling mill or alternatively both the zero point of the roll positioning devices and the deformation characteristic of the strip rolling mill are found from a measured value of the thrust counterforces in the axial direction of the roll acting on at least all the rolls except for the backup rolls in the kiss-roll tightening state and also from a measured value of the roll forces of the backup roll acting on the backup roll chocks of the top and the bottom backup roll in the vertival direction. According to the thus obtained zero point of the roll positioning devices or the deformation characteristic of the strip rolling mill, the setting and control of the roll forces is executed when rolling is carried out.

Abstract: A roller assembly for use as a back-up roller for work rolls. The roller assembly comprises an axle, a roller rotatably mounted on the axle, a plurality of bearing elements rotatably positioned between the axle and roller, at least one bushing which is eccentric relative to the axle and which is fixedly mounted on the axle by a dowel which passes through holes in the axle and eccentric bushing, and a housing for the bushing. The eccentric bushing is rotatable for translating the roller in a radial direction thereof.

Abstract: A rolling stand has a frame and a pair of support shafts centered on respective parallel shaft axes and each having an outer end projecting past the frame, inner and outer axially spaced bearing portions in the frame, and a gear between the respective inner and outer bearing portions. Each outer bearing portion lies between the respective inner bearing portion and the respective outer end. Respective rolls are carried on the outer ends outside the frame and respective eccentric sleeves rotatable in the frame about the axes engage the shafts at the bearing portions so that a spacing of the axes can be varied by rotating the sleeves in the frame. Respective pressure sleeves surround the shafts between the respective inner and outer bearing portions and are connected to a controller that pressurizes the sleeves and thereby bends the shafts in the frame between the inner and outer bearing portions.

Abstract: A rolling mill, especially an inclined roll or Diescher roll mill. Its stand is formed by a pair of portal frames on a cast plate on a foundation spaced apart by cassettes holding the upper and lower roll units and tie rods securing the portal frames against one another and the cassettes. The tie rods are spaced apart vertically or horizontally on the portal frames.

Abstract: An expanding hub assembly for a capstan drive for a steel mill comprising a modified spline having a large cylindrical surface area for mating with an installed mill roll. The cylindrical surface is interspersed with a series of evenly spaced shallow axial troughs formed therein for mating with a series of shallow projecting splines on a mounted mill roll. The hub is hollow and an expansion device is present in the hollow hub for expanding the mating surface of the hub.