A compressor includes a cylindrical casing, a bundle which includes a tubular stationary member and a rotor accommodated into the tubular stationary member, the bundle being configured to be inserted into an inner portion of the casing, and a roller configured to roll on an inner circumferential surface of the casing while supporting the bundle when the bundle is inserted into the inner portion of the casing along an axial direction. An outer circumferential surface of the roller is a continuous convex curved surface defined such that a curvature radius of an end side curved surface portion along a rotating shaft of the roller is smaller than a curvature radius of a center curved surface portion.

A linear motor conveyor system and method for lubrication including: a linear motor track comprising a first guide rail and a second guide rail, wherein the first guide rail has a shaped profile and the second guide rail has a flat profile; at least one moving element provided to the linear motor track comprising a first bearing having a shaped profile with a first bearing surface of polymer configured to engage the first guide rail and a second bearing having a flat profile with a second bearing surface configured to engage the second guide rail; and a lubrication system provided to one of the track and the at least one moving element and configured to provide a lubricant between the first guide rail and the first bearing surface.

Provided is a tripod type constant velocity universal joint (1), including: an outer joint member (2) having track grooves (6) formed at trisected positions in a circumferential direction to extend in an axial direction; a tripod member (3) including leg shafts (9) radially projecting from trisected positions in the circumferential direction; and rollers (4) fitted in a freely rotatable manner about the leg shafts (9), respectively, and received in the track grooves (6), respectively, in which a radially outer surface (4a) of each of the rollers (4) is formed of a surface unsubjected to grinding or cutting work after heat treatment.

A walking foot for a drilling rig comprising a foot plate attacheable to a drilling rig by an travel plate, capable of functionally bearing a load in excess a quarter of the weight of a drilling rig, comprising a planar roller array wherein a plurality of load rollers with parallel rotational axes are dispersed both laterally and longitudinally within the plane, so as to fractionalize a weight applied perpendicular to the plane, and thereby promote longitudinal motion of the roller array in a direction perpendicular to the plurality of roller rotational axes.

A cutting head for monoguide cutters, with a self-adjusting device is provided. The self-adjusting device can include sets of bearings that comprise fixed bearings (31, 32) and an adjustable bearing (33) that act on races (11, 12) of a monoguide profile disposed on different planes. Each adjustable bearing (33) is mounted on a rocker arm (4) with a first end (41) rotatably mounted on a shaft (5) fixed to the cutting head (2), and with a second end (42) that presses against an elastic element (6) situated between the second end (42) of the rocker arm (4) and the case of the cutting head (2), the elastic element (6) determines the pressure of the bearings (31, 32, 33) against the races (11, 12) of the monoguide profile (1).

A slide unit includes a fixed rail fixed to a main body, and provided with a first accommodation space, a movable rail connected to a drawer body to allow the drawer body to be pulled out from and pushed into the main body, provided with a second accommodation space, and configured to be movable with respect to the fixed rail, an inner rail configured such that a first end thereof is inserted in the first accommodation space and a second end thereof is inserted in the second accommodation space, so as to allow the movable rail to be slidable with respect to the fixed rail, and a plurality of slide balls inserted in the first accommodation space to be disposed between the fixed rail and the inner rail, and inserted in the second accommodation space to be disposed between the movable rail and the inner rail.

A slide rail device with an unlocking structure for a middle slide rail includes an outer slide rail mounted on a fixing member, and an inner slide rail mounted on a side wall of a movable member. The inner slide rail is coupled to the outer slide rail to enable a middle slide rail to be disposed between the outer slide rail and the inner slide rail. A ball bearing unit is disposed between the middle slide rail and the inner slide rail. A releasing element is movably disposed on the middle slide rail and arranged between the ball bearing unit and the elastic locking element. When the inner slide rail and the movable member are removed from the slide rail device, the releasing element is pushed by the ball bearing unit and pushes an elastic locking element to unlock the middle slide rail.

A table leg includes a fixed outer tube, a movable inner tube vertically movable in the fixed outer tube and having two pairs of parallel walls, and a plurality of rotating members rotatably mounted to one pair of the parallel walls of the movable inner tube and partially protruding out from an outer surface of the movable inner tube and stopped against an inner surface of the fixed outer tube, such that the rotating members are rotatable when the movable inner tube is moved relative to the fixed outer tube.

An auxiliary assembly device is provided for premounting a linear guide system on a top part. The linear guide system includes two linear guides having two respective mutually displaceable guide rails, which have mutually facing raceways. Rolling elements, which are disposed in a cage, are located between the mutually facing raceways. The auxiliary assembly device has an auxiliary rail, which is configured for connection to a respective narrow end of the two linear guides in order to hold the two linear guides with the top part in a preassembled state for insertion into a bottom part. A method for premounting a linear guide system on a top part is also provided.

Roller guide comprising at least one guide rail, which has at least one first and one second planar region, and comprising a first and a second roller, which are each in contact with the guide rail and roll thereon, wherein the first and the second roller are mounted so that they are rotatable about a common axis of rotation and are formed rotationally-symmetrically about the axis of rotation and a radius of the first roller is smaller than a radius of the second roller, the first roller has a first circular-segment-shaped surface rolling region and the second roller has a second circular-segment-shaped surface rolling region and a centre point of the first surface rolling region and a centre point of the second surface rolling region are arranged on the axis of rotation.