Abstract: A motion guide apparatus ensures that a retaining portion retains a rolling element. A rolling element retainer having retaining portions that prevent a rolling element from falling out of a movable body, the retaining portions extending along a loaded rolling element rolling portion, is incorporated in the movable body of the motion guide apparatus. End plates are formed integrally with the retaining portions. Fall prevention portions to reduce the widths of openings between the retaining portions are provided to center parts of the retaining portions in a length direction thereof. The fall prevention portions are padding portions integrated with the retaining portions, the padding portions rising in such a manner as to reduce the widths of the openings, and/or projections integrated with the retaining portions, the projections touching the movable body in such a manner that the center parts of the retaining portions bend toward a track member.

Abstract: A motion guide apparatus ensures that a retaining portion retains a rolling element. A rolling element retainer having retaining portions that prevent a rolling element from falling out of a movable body, the retaining portions extending along a loaded rolling element rolling portion, is incorporated in the movable body of the motion guide apparatus. End plates are formed integrally with the retaining portions. Fall prevention portions to reduce the widths of openings between the retaining portions are provided to center parts of the retaining portions in a length direction thereof. The fall prevention portions are padding portions integrated with the retaining portions, the padding portions rising in such a manner as to reduce the widths of the openings, and/or projections integrated with the retaining portions, the projections touching the movable body in such a manner that the center parts of the retaining portions bend toward a track member.

Abstract: A motion guide apparatus ensures that a retaining portion retains a rolling element. A rolling element retainer having retaining portions that prevent a rolling element from falling out of a movable body, the retaining portions extending along a loaded rolling element rolling portion, is incorporated in the movable body of the motion guide apparatus. End plates are formed integrally with the retaining portions. Fall prevention portions to reduce the widths of openings between the retaining portions are provided to center parts of the retaining portions in a length direction thereof. The fall prevention portions are padding portions integrated with the retaining portions, the padding portions rising in such a manner as to reduce the widths of the openings, and/or projections integrated with the retaining portions, the projections touching the movable body in such a manner that the center parts of the retaining portions bend toward a track member.

Abstract: An object is to provide a motion guide apparatus that can facilitate an assembly operation. An end member (4a, 4b) including an inner peripheral side of a direction changing path (2c) is placed on an end surface in a movement direction of a moving member body (3). At least one of a pair of the end members (4a and 4b) includes an opening (21) linking to the inner peripheral side of the direction changing path (2c) to load rolling elements (42) into a circulation path. Opposing surfaces (18) of the pair of the end members (4a and 4b) to the moving member body (3) are formed in flat surfaces. The pair of the end members (4a and 4b) molded integrally with a holding portion (5) is incorporated into the moving member body (3) in a direction orthogonal to the movement direction of the moving member body (3). A lid member (7a, 7b) closes the opening (21) in the end member (4a, 4b).

Abstract: A motion guide device including a track shaft having a rolling surface; a moving member movable along the track shaft; a first seal member in sliding contact with a surface of the track shaft to close a gap between the track shaft and the moving member; and a second seal member provided along the rolling surface of the track shaft and closes the gap between the track shaft and the moving member. The second seal member includes: a fixing substrate locked to the moving member; and a seal portion fixed to the fixing substrate along the rolling surface of the track shaft and includes a seal lip portion in sliding contact with the surface of the track shaft and an extended seal portion in close contact with the first seal member while being compressed by the first seal member when the first seal member is fixed to the moving member.

Abstract: Provided is a motion guide device capable of suppressing generation of a gap between a first seal member and a second seal member, which are fixed to a moving block, and preventing foreign matters from entering the moving block, to thereby achieve a smooth motion of the moving block with respect to a track rail. The motion guide device includes: a track shaft having a rolling surface; a moving member freely movable along the track shaft; the first seal member that comes into sliding contact with a surface of the track shaft so as to close a gap between the track shaft and the moving member; and the second seal member that is provided along the rolling surface of the track shaft and closes the gap between the track shaft and the moving member.

Abstract: Provided are a motion guide device and a screw device each having a cover for protecting the device against moisture, such as coolant, and powder dust. The motion guide device has a raceway member 11, a moving member main body 21 mounted on the raceway member 11 through a plurality of rolling elements and cap members 22 attached to respective end surfaces of the moving member main body 21 in a relative moving direction. A seal cover 50 is provided having a cover main body 51 that covers each of the cap members 22 and a seal section 55 that is provided between the cover main body 51 and a cap member-side end surface of the moving member main body 21 to stop a gap between the cap member-side end surface of the moving member main body 21 and the cover main body 51. This structure makes it possible to reliably prevent any foreign material, such as powder dust or swarf, and moisture, such as coolant, from getting into the inside of the moving member 20.

Abstract: A detection unit of a matching apparatus 32 is connected to a control unit 6 of a computer so that a detection signal indicating measured values of diameters of outer and inner ring raceways can be sent thereinto. An outer ring secondary grinding apparatus 24, an cuter ring super finish machining apparatus 25a, an inner ring secondary grinding apparatus 26 and an inner ring super finish machining apparatus 28a are connected to the control unit 6 so that control signals can be received. The control unit 6 imparts shift amounts to diameter machining target values which are set, respectively, in the grinding apparatus 24, 26 and the super finish machining apparatus 25a, 28a for machining a raceway surface of at least one bearing ring of outer and inner rings, based on measured values of diameters of the outer and inner ring raceways which were measured by the detection unit.