A dual-sleeve, locking adjustment arrangement includes a position-sensitive component comprising an aperture, an outer eccentric sleeve disposed in the aperture, and an inner eccentric sleeve disposed in the outer sleeve. Rotation of the outer sleeve with respect to the position-sensitive component and the inner sleeve drives rotation of the position-sensitive component to adjust an angular position of the component.

A zero-positioning mechanism of a metalworking machine contains: a base, a locking jig, and a pneumatic cylinder. The base includes at least one installation area. The locking jig includes a body, a slider assembly, and a fixing plate. The pneumatic cylinder includes the piston and a push unit. The body includes a through orifice, the slider assembly includes two pushers and four sliders. A respective pusher has a lower fringe, two beveled fringes, and multiple receiving orifices. A respective receiving orifice is configured to accommodate a respective one of multiple resilient elements. A respective slider is arranged on the respective beveled fringe of the respective pusher and has a conical positioning portion. The fixing plate includes a first face and a second face. The first face has multiple coupling apertures and four locking apertures, and the second face has a groove with multiple chutes.

A zero-positioning mechanism of a metalworking machine contains: a base, a locking jig, and a pneumatic cylinder. The base includes at least one installation area. The locking jig includes a body, a slider assembly, and a fixing plate. The pneumatic cylinder includes the piston and a push unit. The body includes a through orifice, the slider assembly includes two pushers and four sliders. A respective pusher has a lower fringe, two beveled fringes, and multiple receiving orifices. A respective receiving orifice is configured to accommodate a respective one of multiple resilient elements. A respective slider is arranged on the respective beveled fringe of the respective pusher and has a conical positioning portion. The fixing plate includes a first face and a second face. The first face has multiple coupling apertures and four locking apertures, and the second face has a groove with multiple chutes.

A cam lock connected with a fence assembly includes a handle portion, a top carrier and a bottom carrier connected by a threaded shaft. The handle portion and top carrier are positioned above the fence assembly and a work table or surface; wherein the bottom carrier is positioned below the fence assembly and work table or surface. The top carrier and bottom carrier both have a pair of alignment arms with a space positioned therebetween, the alignment arms of the top carrier nest with the alignment arms of the bottom carrier. The handle portion and top carrier both have cam surfaces that engage one another such that when the handle portion is rotated around the axis of the threaded shaft the handle portion is raised or lowered thereby raising or lowering the bottom carrier, thereby locking or unlocking the fence assembly in a quick, durable, easy and accurate manner.

A cam lock connected with a fence assembly includes a handle portion, a top carrier and a bottom carrier connected by a threaded shaft. The handle portion and top carrier are positioned above the fence assembly and a work table or surface; wherein the bottom carrier is positioned below the fence assembly and work table or surface. The top carrier and bottom carrier both have a pair of alignment arms with a space positioned therebetween, the alignment arms of the top carrier nest with the alignment arms of the bottom carrier. The handle portion and top carrier both have cam surfaces that engage one another such that when the handle portion is rotated around the axis of the threaded shaft the handle portion is raised or lowered thereby raising or lowering the bottom carrier, thereby locking or unlocking the fence assembly in a quick, durable, easy and accurate manner.

A method of correcting an axial position of a workpiece support (1) used for removing material from a dental workpiece (2) which is held by the workpiece support (1) and is rotated together with the workpiece support (1) about a drive rotation axis (3) when material is being removed. The workpiece support (1) has at least two workpiece support parts (4, 5, 6) which can be separated from each other and connected to each other. One of the workpiece support parts (4, 5) has at least one compensation region (7) with a material projection (8) for introducing a compensation surface (9) by removing material, and the other workpiece support part (6) has a seating surface (10) for connecting to the compensation surface (9) in a form fitting manner.

The invention discloses a double-station gantry combined machining system allowing automatic overturning of workpieces, which comprises a first mobile gantry machining unit, a second mobile gantry machining unit, an overturning platform, a first workpiece fixing table, a second workpiece fixing table and a guide rail, wherein the overturning platform is positioned between the first gantry machining unit and the second gantry machining unit. According to the invention, the system is highly integrated, continuous machining of a gantry machine tool is completed, the working efficiency is improved, and the machining cost of the system is reduced.

A multifunctional base for a router is provided to allow precise and repeatable cuts through the use of a set of adjustable fences, template guides and bushings. The base has reference surfaces to allow precision cuts at set distances from a fence or template.

A multifunctional base for a router is provided to allow precise and repeatable cuts through the use of a set of adjustable fences, template guides and bushings. The base has reference surfaces to allow precision cuts at set distances from a fence or template.

A device for extracting drilling sludge for use at difficult to access locations on a building site includes a main body. The main body has a cavity on a lower side of the main body and a drilling sludge that is disposed in the cavity during a use of the device is extractable from the cavity by a suction device. The main body also has an extraction opening which opens into the cavity.