The invention relates to a drill hold assembly and a jig including the same. The drill hold assembly includes an engaging means which is selectively moveable between a released position to allow sliding movement of the drill bit with respect thereto and an engaged position in which the drill bit is held in a fixed position or within a predefined range of movement with respect to the engaging block to thereby maintain the drill bit in location with the drill hold assembly. The jig apparatus can be used with a powered drill to rotate the drill bit to provide a driving force to the drill bit and the jig is attached to a support surface and a workpiece is positioned between first and second jaws of the jig and the drill bit is advanced along a guide and introduced into the workpiece to form a hole therein at a predefined angle. The drill bit can then be removed from the hole and the drill bit is held by the drill hold assembly to retain the drill bit in a fixed position with respect to the jig to thereby allow relative movement of the jig apparatus and workpiece whilst the drill bit is retained in position with the jig apparatus.

A cutting tool includes a tool holding system having a clamping portion. The clamping portion includes an integrally formed one-piece inner coupling member that at least partially forms a clamping sleeve portion having a clamping bore for clampingly receiving a cutting insert. The clamping portion also includes an integrally formed one-piece outer coupling member that is circumferentially disposed about at least a portion of the inner coupling member. The tool holding system also has a mounting portion that is connected to one of the inner and outer coupling members. The inner and outer coupling members are captively and non-releasably engaged with each other via inter-engaged first and second engagement surfaces that are slidingly displaceable with respect to each other.

The invention discloses an improved automobile hub lathe fixture. A central positioning pin (2) is arranged in a fixture body center sleeve, wheel lip positioning pins (3) are arranged on the same pitch circle of a fixture body, clamping jaws (4) are connected to supports (5) via hinge pins (6), the supports (5) and the fixture body (17) frame are casted into a whole, connecting screws (8) are fixed at the lower ends of the clamping jaws (4) via connecting nuts (7), lifting pins (9) are arranged in guide sleeves, the bottoms of the clamping jaws (4) are connected to a fixture body frame by tension springs (10), a three-leaf disc cam (11) is arranged on top half of the gear rotating shaft (13), the gear rotating shaft (13) is arranged in a guide sleeve (12) of the fixture body frame, and a rack ejector rod (14) is connected with a cylinder (15). The improved automobile hub lathe fixture can save the manpower and materials and further improve the production efficiency.

The invention discloses an improved automobile hub lathe fixture. A central positioning pin (2) is arranged in a fixture body center sleeve, wheel lip positioning pins (3) are arranged on the same pitch circle of a fixture body, clamping jaws (4) are connected to supports (5) via hinge pins (6), the supports (5) and the fixture body (17) frame are casted into a whole, connecting screws (8) are fixed at the lower ends of the clamping jaws (4) via connecting nuts (7), lifting pins (9) are arranged in guide sleeves, the bottoms of the clamping jaws (4) are connected to a fixture body frame by tension springs (10), a three-leaf disc cam (11) is arranged on top half of the gear rotating shaft (13), the gear rotating shaft (13) is arranged in a guide sleeve (12) of the fixture body frame, and a rack ejector rod (14) is connected with a cylinder (15). The improved automobile hub lathe fixture can save the manpower and materials and further improve the production efficiency.

In one aspect, cam bolts are described herein employing a dual cam surface architecture. In some embodiments, a cam bolt described herein defines a longitudinal axis and comprises a first end, a second end, at least one engagement member disposed on at least one of the first end and the second end, at least two first cam surfaces, and at least one second cam surface. The engagement member is configured to engage a torque implement to rotate the cam bolt about the longitudinal axis when torque is applied by the torque implement. The first cam surfaces are disposed about the longitudinal axis and have a first cam profile. The second cam surface is disposed about the longitudinal axis between the first cam surfaces and has a second cam profile differing from the first cam profile. At least one of the first and second cam profiles can be non-circular.

A pipe machining apparatus includes a frame, a tool support, an advancement device, and an advancement member. The tool support is coupled to and movable relative to the frame. The tool support is adapted to support a tool and move the tool in a direction toward a pipe at an increment. The advancement device includes an advancement projection fixedly attached to the frame. The advancement projection includes a contact-surface. The advancement member is coupled to the tool support. Upon the advancement member contacting the contact-surface of the advancement projection the advancement member is adapted to advance the tool towards the pipe at the increment. The contact-surface of the advancement projection is shaped to always be in a non-perpendicular contact position with the advancement member.

A machine tool includes: a column; a spindle head supported by the column; a spindle in the spindle head; a draw bar moved upward to clamp a tool to the lower end portion of the spindle and moved downward to release the tool therefrom; a biasing portion biasing the draw bar upward; a cam mechanism including a cam in the column and an arm whose one end slides on a cam surface such that the other end pushes down the draw bar; a measurement portion measuring the position of the draw bar; a storage portion storing a position relationship between the spindle head and the draw bar when the cam mechanism is normal; and an abnormality determination portion determining an abnormality in the cam mechanism based on the position of the draw bar measured with the measurement portion and the relationship stored in the storage portion.

A tool holder having a holder body, an opening of the holder body having opposing upper and lower jaws respectively defining upper and lower pocket surfaces of an insert receiving pocket, and a resilience slot extending away from the insert receiving pocket. A first plane intersects the upper and lower pocket surfaces, and an actuating member extends from the upper jaw along a first axis in a downward direction and traverses the resilience slot. The lower jaw includes an access bore, and a locking member occupies the access bore and engages a locking portion of the actuating member. The upper jaw has a top jaw surface facing in an upward direction, and the first axis intersects the top jaw surface. A cutting tool is configured with the tool holder and a cutting insert removably secured in the insert receiving pocket.

The chuck with locking device has a ratchet mechanism comprising a toothed ring (5) with asymmetrical teeth (5a) fixed to an outer casing (2), a ratchet ring (9) arranged such that it can slide but not rotate with respect to a base body (1) and provided with tabs (11) or teeth (9a) providing ratchet interlocking elements, a release elastic element arranged under compression between the ratchet ring (9) and the toothed ring (5), a locking ring (7) arranged adjacent to the ratchet ring (9) outside the base body (1) and fixed inside a locking control sleeve (14), a cam groove (8) formed in the locking ring (7), and a pin (13) inserted in the cam groove (8) and in a hole (30) formed in the base body (1). The locking control sleeve (14) moves the locking ring (7) and the ratchet ring (5) between locking and unlocking positions.

An ultra-precise boring cartridge and an adjustment device is disclosed. The boring cartridge includes a cam, a cam follower contacting the cam by a sloped portion, and a spring arrangement exerting a biasing force against the cam follower. The adjustment device includes a graduated dial affixed to an annular sleeve having a hexagonal-shaped end engaged with the boring cartridge. In an embodiment, a dial of the boring cartridge is rotated in increments of about 3.6 by the adjustment device, which causes movement of about 0.005 mm of the cam in a X-direction and movement of about 0.001 mm of the cam follower in a Y-direction, thereby selectively adjusting a machining radius of a cutting insert mounted on the cam follower.