Abstract: A linear slide includes an elongate guide rail, a sliding block, a pair of ball roller chains, and a pair of cylindrical roller chains. Each of the ball and cylindrical roller chains is disposed between the elongate guide rail and the sliding block to thereby permit the sliding block to slide along the elongate guide rail.

Abstract: A tool device for a processing machine includes a housing, a tool holder, and a positioning unit. The tool holder includes a first spindle extending into the housing and having a first connecting end. The positioning unit includes a second spindle to rotate along with the first spindle, and an adapter connected to the second spindle opposite to the first spindle and adapted to be connected to the processing machine. The second spindle has a second connecting end surrounding the first connecting end. A releasable interengagement unit interengages the first and second connecting ends so as to connect the second spindle to the first spindle. A bushing is disposed between the first and second connecting ends to center the first connecting end with respect to the second connecting end.

Abstract: A rotary holding device includes a drive axle disposed within a housing, a worm gear supported by the drive axle and having a helical thread, a driven axle disposed within the housing and perpendicular to the drive axle, a rotary holder carried by the driven axle, and first and second drive discs mounted coaxially on the driven axle respectively at two opposite sides of the worm gear. Each of the first and second drive discs has an inner face provided with a plurality of axially projecting and angularly spaced-apart rollers that mesh with the helical thread of the worm gear.

Abstract: A linear slide includes an elongate guide rail, a sliding block, a pair of ball roller chains, and a pair of cylindrical roller chains. Each of the ball and cylindrical roller chains is disposed between the elongate guide rail and the sliding block to thereby permit the sliding block to slide along the elongate guide rail.

Abstract: A CNC machine tool includes a worktable supporting two workpieces and rotatable on a base so as to exchange the positions of the workpieces. A post member is fixed on the base. A first horizontal rail unit is movable vertically on the post member. A second horizontal rail unit is movable on the first horizontal rail unit along a first horizontal direction. A spindle head unit is movable on the second horizontal rail unit along a second horizontal direction perpendicular to the first horizontal direction.

Abstract: A CNC machine tool includes a worktable disposed movably on a machine bed and having a fixed first engaging element, a working disk mounted rotatably on the worktable for holding a workpiece to be cut, and a rotating unit with a rotating shaft journalled on the worktable. A second engaging element is fixed to the working disk. The working disk is rotated mechanically by a preset angle by the rotating unit per one-revolution rotation of the rotating shaft on the worktable. When the rotating unit does not rotate the working disk during rotation of the rotating unit, it activates the first and second engaging elements to engage each other so as to fix the working disk relative to the worktable.

Abstract: A spindle assembly for a machine tool includes a hollow spindle body, a pull rod movable within the spindle body, and a cutter inserted into the spindle body. An insert rod is connected removably to the cutter by an adapter, and is inserted into the spindle body. A chuck unit is disposed within the spindle body, and is retained on the pull rod so as to move with the pull rod. Each of the paw members is formed with an inward flange that is turnable to engage an outward flange on an end of the insert rod when the pull rod is moved within the spindle body, thereby locking the cutter on the spindle body.

Abstract: A CNC lathe with double-speed shifting feature in spindle axis comprises a frame, a screw rod pivotally disposed along a lengthwise spindle axis of the frame, a worktable assembly and a tool holder assembly; characterized in that the screw rod includes a positive thread section and a counter thread section for engaging two nuts respectively secured on the worktable assembly and the tool holder assembly; thereby when the screw rod is rotated by a servomotor, the tool holder assembly and worktable assembly are simultaneously shifted in opposite directions along the spindle axis for obtaining a relatively shifting speed at the double of conventional one, so that the non-cutting operation time of a CNC lathe is greatly reduced, and so that the overall machining speed and efficiency are improved.

Abstract: A machine tool includes a tool spindle rotatably mounted in a housing. A tool member is disposed in a front spindle segment of the spindle and is releasably clamped by a clamping member. An actuating member is mounted in and is axially movable relative to the spindle to actuate the clamping member. First and second anti-friction bearings are interposed between the housing and the spindle and have different outer diameters. A preload actuating member is disposed to force the second anti-friction bearing in the axial direction to take up the slack in a non-actuated state of the second anti-friction bearing when the spindle is running in a higher speed, thereby resuming the anti-friction function of the second anti-friction bearing when running the tool spindle at a lower speed is intended.

Abstract: A CNC lathe with double-speed shifting feature in spindle axis comprises a frame, a screw rod, a worktable assembly, and a tool holder assembly; wherein the frame has lengthwise spindle axis direction and a widthwise direction perpendicular to the lengthwise spindle axis direction. The screw rod including two sections of opposite threads, namely a positive thread section and a counter thread section is pivotally disposed on the frame along the lengthwise spindle axis direction.

Abstract: A CNC machine center with double-speed shifting feature in X and Z axes, comprises an upright stand for disposing a worktable assembly and a tool holder assembly. The worktable assembly and the tool assembly are relatively movable with each other in two perpendicular coordinate axes, i.e., X-axis and Z-axis. It is characterized in that in at least one of X-axis and Z-axis, the tool holder assembly and the worktable assembly are interconnected with each other by a screw rod having a positive thread section and a counter thread section, thereby the tool holder assembly and worktable assembly can be simultaneously shifted in opposite directions to obtain a relative shifting speed double of conventional one, so that the non-cutting operation time of a machine center is greatly reduced, and so that the overall machining speed and efficiency are improved.

Abstract: A linear slide includes an elongated guide rail and a sliding block straddling the guide rail. A plurality of rolling elements are disposed between the sliding block and the guide rail so that the sliding block is capable of sliding back and forth along the length of the guide rail. The rolling elements include cylindrical roller trains, which are carried on the upper surface of the guide rail, and rolling ball trains which are carried on the lateral surfaces of the guide rail.