In a linear motion guide unit, in order to prevent direct collision of a roller, or a rolling element, with an end portion of a carriage, an extending portion of a spacer of an end cap is disposed at the end portion of the carriage for absorbing impact resulting from collision of the roller. The spacer has the extending portion which protrudes from the spacer at a position adjacent to an inner circumferential surface of a turnaround passage and which has a wall surface continuous from the inner circumferential surface of the turnaround passage. The wall surface of the extending portion serves as a collision receiving surface for receiving a colliding roller. The carriage has a housing recess which is formed at an end of a raceway groove thereof and to which the extending portion is fitted.

A curvilinear rolling guide unit allows a slider to readily straddle an endless guide rail and can prevent leakage of lubricant from a lubrication hole formed in each end cap. Each end cap is composed of an end cap body and a spacer. The end cap body has a lubrication hole, a lubrication groove, a slit which are formed in an upper portion thereof. The lubrication groove establish communication between the lubrication hole and turnaround passages. The slit extends from the lubrication hole to the under surface of the upper portion. A lubrication plug is fitted into the lubrication hole of the end cap body, closes the slit, and has a hole formed therein and serving as a lubrication passage communicating with the lubrication groove.

A rolling device includes: an inner member that has a raceway face; an outer member that has a raceway face facing the raceway face; and rolling elements that are disposed between both raceway faces in a rollable manner, wherein at least one of the inner member and the outer member has a space formed therein. Further, a method for manufacturing a rolling device including an inner member that has a raceway face, an outer member that has a raceway face facing the raceway face, rolling elements that are disposed between both raceway faces in a rollable manner, and a space that is formed inside at least one of the inner member and the outer member by a 3D printer.

A motion guide device includes a plurality of rolling element guide members provided along the entire length of a rolling element rolling surface so as to guide the unloaded side of a plurality of rolling elements that perform a rolling movement under load between the rolling element rolling surface and a loaded rolling element rolling surface. The rolling element guide member includes a beam member an outer member including a rolling element guide surface for guiding the unloaded side of the rolling elements, and the beam member and the outer member are insert-molded. Such a structure provides the motion guide device including the rolling element guide member that enables low cost manufacturing of a complex shape and capability of secure installation and guidance of the rolling elements with no deflection and can be adapted for use in various types by optionally selecting a connecting means.

A sensor device for a rolling path insert of a track guide can be loaded by rolling bodies and is pressure-sensitive. The sensor device includes at least one tuple, extending in a rolling direction, of a number of sensors, which can each be signal-connected or are signal-connected to an evaluation device, by means of which a relevant difference signal can be determined from sensor signals of sensor pairs of the at least one tuple. The sensor device can be included in a rolling path insert, a guide carriage and a guide rail for a track guide, and a track guide.

An upper dustproof member of a linear guideway includes a connection segment and two floating dustproof segments that are respectively connected to two opposite sides of the connection segment. Each of the two floating dustproofing segments has a carrying bar and at least one rib that is connected to the carrying bar. In each of the two floating dustproofing segments, the carrying bar has two end portions each having a bevel arranged away from the at least one rib. When the bevels of the end portions of the upper dustproof member are respectively inserted into four tolerance slots of two end caps, each of the end portions and the corresponding end cap have a tolerance gap therebetween, so that a slanting surface of each of the bevels abuts against the corresponding tolerance slot, and each of the end portions is deformable toward the corresponding tolerance gap.