In one or more embodiments, a project support system is provided having a base, a dial, a top cover, a moveable member, and a mechanical assembly. The dial is rotatably connected to the base. The top cover has an opening. The mechanical assembly is configured to extend the movable member upward through the opening to a fully extended position in response to the dial being rotated in a first direction relative to the base, thereby providing a smaller upper surface for support of a workpiece. The mechanical assembly is further configured to retract the movable member downward back through the opening to a fully retracted position in response to the dial being rotated in a second opposite direction relative the base, thereby providing a larger upper surface for support of the workpiece.

A gun smith platform includes a top plate. The top plate has a tool hole centrally disposed on the top plate that extends through the top plate through which a work piece attached to a work tool mounted to a bottom side of the top plate may extend, a plurality of alignment holes extending in a linear pattern from the tool hole, the alignment holes configured to receive alignment pins, at least one row of threaded mounting holes disposed parallel to the linear pattern of alignment holes, and a recessed track disposed parallel to the at least one row of threaded mounting holes. Four legs are attached to and supporting the top plate.

A gunsmithing block is disclosed. The gunsmithing block has a first end for interfacing with a vice, and a second end shaped to interface with an upper receiver assembly of a firearm, the upper receiver assembly having an upper receiver, a bolt carrier without a bolt, and a barrel extension. The second end has an upper receiver mating portion shaped to interface with an interior region of the upper receiver and an interior region of the barrel extension. Methods of using and making a gunsmithing block are also disclosed.

A clamp for key duplicating machines includes a support, a pin emerging therefrom with a threaded upper end engagable by a knob, the support base having a pair of upper parallel projections on opposite sides of the pin, a lower jaw of square plan, positioned on the support and having a central hole rotatably engaged by the pin, with four grooves in its lower surface parallel to the jaw sides and engagable in pairs with the projections, an upper jaw of square plan, having a central hole rotatably engaged by the pin and cooperating with the lower jaw to clamp a key, wherein the pair of projections are shaped as parallel cylindrical pegs emerging from the upper surface of the support. When the clamp is active, its lower jaw rests only by two grooves on the two projections, otherwise the lower surface is spaced from the support upper surface.

A tool holder comprises a first pair of opposing sides and a second pair of opposing sides. The second pair of opposing sides is disposed intermediate the first pair of opposing sides. The tool holder includes an at least one pocket attached to at least one of the sides. A first pair of straps connect a top edge of each of the first pair of opposing sides. The tool holder is configurable between an expanded position and a collapsed position.

An extraction device for use in servicing a pump having a pump housing with a first side, a second side, and a channel extending between the first side and second side. A plunger is located within the channel, and the channel has a threaded opening at the first side. The device includes an externally threaded plug and a driving component selectively extending through the plug. The device is anchored to the pump housing by threading the plug into the threaded opening at the first side. The driving component is then extended into the channel, through and beyond the plug, to engage the plunger and push it out of the housing at the second side.

A guide apparatus includes a track member, a movable member having a first rolling surface that forms a load rolling passage together with a rolling surface of the track member, and a damper provided on a first surface. The first surface is at least a portion of the surface of the movable member opposed to the track member excluding the first rolling surface. The damper includes a plate member disposed in such a way as to cover the first area and a reservoir space formed between one surface of the plate member and the first area. The reservoir space contains a damping medium and allows the plate member to displace relative to the first area. The damper is provided on the movable member in such a way that the other surface of the plate member slides on at least a portion of the surface of the track member opposed to the movable member.

Measuring apparatus includes an upper support supporting a first end of a columnar work piece in an axis direction, a lower support supporting a second end of the work piece in the axis direction, a probe measuring the work piece supported by the upper support and lower support, a rotary table coupled to the lower support and capable of rotating centered in the axis direction, and a post provided to the rotary table and mounting a first position determiner and a second position determiner so as to be switchable, the first and second position determiner determining a position of the work piece with respect to the rotary table. When a first columnar work piece as the work piece is supported by the upper support and lower support, the first position determiner is mounted to the post to determine a position by contacting the first work piece.

In a clamping device, a detection mechanism detects a state of clamping/unclamping and includes: a detected body that moves together with a piston and a piston rod; a circuit board disposed to face the detected body and capable of detecting the position of the detected body; and an indicator lamp that is connected to the circuit board and is lit/extinguished depending on the state of clamping/unclamping. By pressing a setting button provided on the detection mechanism when the rotation angle of the arm is changed, the second detection position of the circuit board for detecting the unclamped state is changed, making it possible to detect the detected body at a newly set detection position.

A fixture for locating a straight edge of a curved surface of a part and holding the part in a fixed position during performance of a machining operation on the straight edge is described. The fixture includes: one or more supports for seating a convex curved surface of the part, one or more detachable end stops arranged to extend in a plane orthogonal to that in which the supports sit and against which, in use, the straight edge can be aligned, and a clamp arranged, in use, to push the convex curved surface against the supports such that the straight edge contacts the supports without obstruction of the straight edge.