Abstract: A driving shaft is a hollow or solid shaft with multiple sections of different diameters, and the shaft includes a transmission end and a knife end. The transmission end is formed on a first-diameter section of the shaft. The transmission end has a first shoulder to which a bearing is mounted. At least one transmission member is connected to the transmission end. The knife end is formed on a second-diameter section of the shaft and has a second shoulder to which another bearing is mounted. A knife is connected to the knife end. The knife end includes a release hole and a tapered hole. At least two grooves are defined in the transmission end and extend toward the knife end for a length. Higher torque is able to be applied to the shaft.

Abstract: A vise includes a base with a fixed jaw and a screw extends through the base and a movable jaw is connected to the screw. A frame is fixedly connected to the base and a first wedge ramp extends from the frame. A sleeve movably extends through the frame and a second wedge ramp extends from the sleeve. A spring is mounted to the screw and received in the sleeve. An end of the screw extends through the spring and extends from the hole in the frame. A crank handle is connected to the end of the screw. When the sleeve is rotated to match two respective high points of the two ramps, the sleeve and the screw are shifted and quickly clamp the object by movement of the screw.

Abstract: A control mechanism for controlling axial movement of a driving shaft of a machine such as a drilling machine. The control mechanism consists of a clutch cooperating with a sleeve member which is operated by two pivotal handles such that when pivoted the driving shaft is lowered and is stopped when the handles are returned.