A chuck structure includes: a first chuck, provided with a seat slidable relatively thereto, the seat provided with a first stop; a limiting element, swingable relatively to the seat, and provided with a second chuck; and an operating element, respectively connected with the limiting element and a second chuck, and driving the second chuck to move relatively to the first chuck to form an accommodation space between the first chuck and second chuck, an elastic element configured between the operating element and limiting element, and the elastic element pressing against the limiting element to approach the seat, allowing the second and first stops to be in contact with each other. The present invention can use the operating element 3 to adjust the size of the accommodation space, and the second stop in contact with first stop to make the operating element can only be rotated in a single direction.

A chuck structure includes: a first chuck, provided with a seat slidable relatively thereto, the seat provided with a first stop; a limiting element, swingable relatively to the seat, and provided with a second chuck; and an operating element, respectively connected with the limiting element and a second chuck, and driving the second chuck to move relatively to the first chuck to form an accommodation space between the first chuck and second chuck, an elastic element configured between the operating element and limiting element, and the elastic element pressing against the limiting element to approach the seat, allowing the second and first stops to be in contact with each other. The present invention can use the operating element 3 to adjust the size of the accommodation space, and the second stop in contact with first stop to make the operating element can only be rotated in a single direction.

A known rotary tool holder (10) comprises a rotary tool gripper (11) and a non-rotary part (16) presenting a flat front wall (18), the rotary tool gripper projecting from the flat front wall and comprising a shaft segment (15) having two shaft flats (12, 13). A kit to assist in the manual change of a tool from such a rotary tool holder comprises a forked holding element (20) provided with two fingers (22, 23) that are suitable to be fitted by their inside on the two shaft flats, and a locking plate (30) that comprises a recess (31) and is suitable to be fixedly mounted on the front wall with the recess facing it, said recess being configured to house the two fingers fitted on the two shaft flats when the locking plate is mounted on the front wall, the recess extending across the locking plate and being delimited by two steps (32, 33) against which the two fingers can be fitted by their outside.

In a deterministic setting for finishing the support surface of a chuck such as a wafer chuck, the treatment tool may have a contacting surface shaped as a ring, annulus, or toroid, or at least such will be the form of contact when the treatment tool is brought into contact with a flat surface. The treatment tool may have about the same hardness as the work piece (e.g., the wafer chuck) that is being finished. In one embodiment, the treatment tool, or at least the flat contacting surface, is made from silicon carbide (SiC), or contains SiC, for example, in the form of a composite material such as reaction-bonded SiC.

Intrusion of chips is prevent into gaps formed between inner end surfaces of master jaws and a chuck cover. A top plate is disposed at the center of an end surface of a chuck body. Top covers, which move in conjunction with movements of master jaws when opening and closing the chuck, are disposed in top cover guide recesses formed at three positions on the top plate. Each top cover abuts the center-side end parts of serrated surfaces formed on both widthwise sides of a respective master jaw and the center-side end part of a step section of a stepped claw therebetween, and the top covers close gaps formed at the center-side end parts by the movements of the master jaws at all times by moving in conjunction with movement of the master jaws.

A rotating apparatus includes a body connected to a power generation part to rotate a member to be rotated and comprises a driving shaft formed at a side thereof and coupled to the power generation part, a disc-shaped seating part formed at another side thereof, multiple fixing protrusions protruding at an uniform interval on an edge portion of an upper surface of the seating part, a boss protruding from the center thereof, and multiple latching protrusions formed on the outer peripheral surface of the boss; a locking part coupled to the upper surface of the seating part to make in contact with the upper surface of the seating part, and a reverse rotation prevention means maintaining a coupling state between the locking part and the body.

A known rotary tool holder (10) comprises a rotary tool gripper (11) and a non-rotary part (16) presenting a flat front wall (18), the rotary tool gripper projecting from the flat front wall and comprising a shaft segment (15) having two shaft flats (12, 13). A kit to assist in the manual change of a tool from such a rotary tool holder comprises a forked holding element (20) provided with two fingers (22, 23) that are suitable to be fitted by their inside on the two shaft flats, and a locking plate (30) that comprises a recess (31) and is suitable to be fixedly mounted on the front wall with the recess facing it, said recess being configured to house the two fingers fitted on the two shaft flats when the locking plate is mounted on the front wall, the recess extending across the locking plate and being delimited by two steps (32, 33) against which the two fingers can be fitted by their outside.

A metal plate includes a machining subject surface. The metal plate includes a first holding portion designed to be held by a chuck and a second holding portion located at a position separated from the first holding portion and designed to be held by the chuck. The method for manufacturing the metal plate includes performing reference surface machining that machines a surface of the second holding portion that is to be held by the chuck into a predetermined shape in a state in which the first holding portion is held by the chuck. The method includes releasing the first holding portion from the chuck and holding the second holding portion with the chuck. The method also includes machining the machining subject surface in a state in which the second holding portion is held by the chuck.

Intrusion of chips is prevent into gaps formed between inner end surfaces of master jaws and a chuck cover. A top plate is disposed at the center of an end surface of a chuck body. Top covers, which move in conjunction with movements of master jaws when opening and closing the chuck, are disposed in top cover guide recesses formed at three positions on the top plate. Each top cover abuts the center-side end parts of serrated surfaces formed on both widthwise sides of a respective master jaw and the center-side end part of a step section of a stepped claw therebetween, and the top covers close gaps formed at the center-side end parts by the movements of the master jaws at all times by moving in conjunction with movement of the master jaws.

The present invention provides an inexpensive chuck device that can achieve both a stable gripping operation and a high degree of accuracy in gripping and can also reduce limitations in the gripping of a workpiece. According to the present invention, a chuck device is provided, the chuck device being characterized by comprising a chuck main body and a master jaw, wherein the chuck main body has an oscillation supporting hole, and the oscillation supporting holes are rotatably provided in plurality around a rotational axis of the chuck main body, and wherein the master jaw has a top jaw detachably provided on one end thereof, and is fitted into the oscillation supporting hole while maintaining surface contact therewith to enable sliding contact.