Abstract: An apparatus for the insertion and withdrawal of the rollers of a roll stand with a transfer car which is moveable in the roller direction, the rollers from the side in a horizontal position being pushed into the roll stand and withdrawn from the roll stand. A coupling drive is arranged on the transfer car, which drive comprises at least two equally long carrier arms which are coupled with each other over a cycloid transmission. A clamping head is arranged at the front free end of the carrier arms for the clamping and horizontal movement of the rollers on their mounting journals. A straight line guide device for the clamping head is arranged parallel to the cycloid transmission on the carrier arms.

Abstract: A lubricating device for mounting on a spindle, such as a roll spindle, in which a split gear ring is mounted on the spindle and confined within a cover which has a pinion therein meshing with the gear ring and forming a lubricant pump therewith. The gear ring has axial hub portions thereon and there are bearings interposed between the cover and the hub portions rollingly supporting the cover on the hub portions. The cover is sealed to the hub portions and is held against rotation on the spindle.