Abstract: A ball cage for ball bearing includes a first race, a second race, a plurality of first ribs equiangularly arranged on the first race with a first curved groove defined between each two adjacent first ribs, and a plurality of second ribs equiangularly arranged on the second race with a second curved groove defined between each two adjacent second ribs. The first ribs are respectively and partially stacked on the second ribs so that each first curved groove is combined with one respective second curved groove to create a respective ball accommodation chamber. Thus, the ball cage can be commonly used for ball bearings lubricated with grease or oil gas to increase the convenience of use.

Abstract: A roller bearing device includes an outer housing and an inner housing, and an endless raceway formed between the housings for engaging with a bearing device, the bearing device includes a number of roller bearing members and a number of spacers engaged between the roller bearing members, the spacers each include a curved recess formed in each side portion for engaging with the roller bearing members, the curved recesses of each spacer is perpendicular to each other, and the spacers each include a channel for forming two resilient blades and for resiliently engaging with the roller bearing members and for stably anchoring the spacers between the roller bearing members.

Abstract: A linear motion system includes an elongated shaft, a movable member mounted at the elongated shaft, a lubricator unit defining therein a grease storage container for storing a lubricating grease, a motor mounted in the grease storage container, a lubricating grease guide connected to the motor, a controller mounted in the grease storage container, and a sensor adapted to provide an actuation signal to the controller upon movement of the movable member, causing the controller to start the motor in moving the lubricating grease guide to expel the storage lubricating grease out of the grease storage container onto the surface of the elongated shaft so as to achieve a self-lubricating effect.

Abstract: A motion guide apparatus includes a cylindrical member having a peripheral protrusion formed between two outer peripheral recesses, a housing engaged onto the cylindrical member and having a peripheral swelling formed between two peripheral depressions, a number of bearing members engaged between the cylindrical member and the housing, and two actuating ring members each having a number of orifices for engaging with the bearing members and each having an inner side portion directed toward the peripheral protrusion and the peripheral swelling, and each having an operating device extended into the gap that is formed between the peripheral protrusion and the peripheral swelling for wiping the lubricating oil.

Abstract: A ball spline device includes a shaft engaged into a nut member and having a number of longitudinal channels and recesses aligned with each other for engaging with ball bearing members, the nut member includes a number of grooves, and two deflecting devices are engaged onto the shaft and the nut member and each include a number of curved guiding pathways each having an inlet portion communicating with the recess of the nut member for guiding the ball bearing members into and out of the curved guiding pathways of the deflecting devices, and an outlet portion communicating with the groove of the nut member for guiding the ball bearing members into and out of the grooves of the nut member.

Abstract: A ball screw device includes a screw engaged into two nut members for forming a ball guiding passage between the nut members and the screw member and for receiving and engaging with bearing members, and a load applying device is disposed on the screw member and disposed between the nut members and applies a load onto the nut members in order to force and move the nut members away from each other and so as to apply a force onto the ball bearing members and in order to stably anchor and retain the ball bearing members between the nut members and the screw member and in order to facilitate a movement between the nut members and the screw member.

Abstract: A ball spline device includes a guide rail engaged into a sliding member and having a number of longitudinal channels and recesses aligned with each other for engaging with ball bearing members, a cylindrical member and a deflecting device are engaged between the sliding member and the guide rail, and the cylindrical member and the deflecting device each include a number of curved guiding pathway communicating with each other for forming a number of endless ball guiding passages in the ball spline device and for engaging with ball bearing members, and the cylindrical member includes a number of protrusions each having a slot for receiving a lubricating fluid to lubricate the ball bearing members.

Abstract: A ball spline device includes a guide rail engaged into a sliding member and having a number of longitudinal channels and recesses aligned with each other for engaging with ball bearing members, a cylindrical member and a deflecting device are engaged between the sliding member and the guide rail, and the cylindrical member and the deflecting device each include a number of curved guiding pathway communicating with each other for forming a number of endless ball guiding passages in the ball spline device and for engaging with ball bearing members, and the cylindrical member includes a number of protrusions each having a slot for receiving a lubricating fluid to lubricate the ball bearing members.

Abstract: A ball spline device includes a shaft engaged into a nut member and having a number of longitudinal channels and recesses aligned with each other for engaging with ball bearing members, the nut member includes a number of grooves, and two deflecting devices are engaged onto the shaft and the nut member and each include a number of curved guiding pathways each having an inlet portion communicating with the recess of the nut member for guiding the ball bearing members into and out of the curved guiding pathways of the deflecting devices, and an outlet portion communicating with the groove of the nut member for guiding the ball bearing members into and out of the grooves of the nut member.

Abstract: A ball screw with a dust-proof and lubricating device comprises: a screw, a nut, a plurality of balls, an oil-absorbing member, a return unit, and two dust-proof members. The nut includes an axial oil-guiding hole, a plurality of radial oil holes in communication with the oil-guiding hole and the helical groove of the nut, and an oil-feeding hole in communication with one of the radial oil holes. The oil-absorbing member is disposed in the oil-guiding hole and the radial oil holes. The return unit is disposed in the nut to enable the turning and circulation of the balls. The two dust-proof members are located at both ends of the axial hole. The ball screw can still be lubricated when it is disposed in a vertical position, and the dust-proof and lubricating device which won't add axial length to the nut.

Abstract: A motion guide apparatus includes a cylindrical member having a peripheral protrusion formed between two outer peripheral recesses, a housing engaged onto the cylindrical member and having a peripheral swelling formed between two peripheral depressions, a number of bearing members engaged between the cylindrical member and the housing, and two actuating ring members each having a number of orifices for engaging with the bearing members and each having an inner side portion directed toward the peripheral protrusion and the peripheral swelling, and each having an operating device extended into the gap that is formed between the peripheral protrusion and the peripheral swelling for wiping the lubricating oil.

Abstract: A linear motion system includes an elongated shaft, a movable member mounted at the elongated shaft, a lubricator unit defining therein a grease storage container for storing a lubricating grease, a motor mounted in the grease storage container, a lubricating grease guide connected to the motor, a controller mounted in the grease storage container, and a sensor adapted to provide an actuation signal to the controller upon movement of the movable member, causing the controller to start the motor in moving the lubricating grease guide to expel the storage lubricating grease out of the grease storage container onto the surface of the elongated shaft so as to achieve a self-lubricating effect.

Abstract: A ball screw device includes a screw engaged into two nut members for forming a ball guiding passage between the nut members and the screw member and for receiving and engaging with bearing members, and a load applying device is disposed on the screw member and disposed between the nut members and applies a load onto the nut members in order to force and move the nut members away from each other and so as to apply a force onto the ball bearing members and in order to stably anchor and retain the ball bearing members between the nut members and the screw member and in order to facilitate a movement between the nut members and the screw member.

Abstract: A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage and for receiving bearing members, the nut member includes a thickness reduced barrel for forming a peripheral surface in the nut member, a tubular member is engaged onto the barrel of the nut member, a number of bearing elements are engaged onto the nut member and the tubular member, a sleeve is engaged onto the nut member and includes an inner peripheral protrusion having two curved side surfaces for engaging with the bearing elements and for solidly and stably anchoring and retaining the bearing elements between the sleeve and the tubular member and the nut member.

Abstract: A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage and for receiving bearing members, the nut member includes a thickness reduced barrel for forming a peripheral surface in the nut member, a tubular member is engaged onto the barrel of the nut member, a number of bearing elements are engaged onto the nut member and the tubular member, a sleeve is engaged onto the nut member and includes an inner peripheral protrusion having two curved side surfaces for engaging with the bearing elements and for solidly and stably anchoring and retaining the bearing elements between the sleeve and the tubular member and the nut member.

Abstract: A ball screw with a dust-proof and lubricating device comprises: a screw, a nut, a plurality of balls, an oil-absorbing member, a return unit, and two dust-proof members. The nut includes an axial oil-guiding hole, a plurality of radial oil holes in communication with the oil-guiding hole and the helical groove of the nut, and an oil-feeding hole in communication with one of the radial oil holes. The oil-absorbing member is disposed in the oil-guiding hole and the radial oil holes. The return unit is disposed in the nut to enable the turning and circulation of the balls. The two dust-proof members are located at both ends of the axial hole. The ball screw can still be lubricated when it is disposed in a vertical position, and the dust-proof and lubricating device which won't add axial length to the nut.