Abstract: It is an object of the invention to provide a tap holder in which even when an error is brought about in synchronizing spindle feeding and rotation of a tapper body and a tap collet of a tap holder in correspondence with a machine tool spindle, the synchronization can be established by absorbing the error by a simple constitution. As means therefor, the tap holder is characterized in that a tapper body and a tap collet are inserted by a locking member at portions of the tapper body and the tap collet overlapping each other, and the tap collet is fixed to the tapper body by engaging the locking member with at least one of the tap collet and the tapper body in a state of being interposed with an elastic member on both sides thereof in an axial direction X.

Abstract: A chuck device includes: a chuck body having a tapered hole at a front end portion and being fixed to a rotational spindle of the machine tool; a collet capable of being reduced in diameter and inserted into the tapered hole for holding the tool; and a nut that can be screwed to the chuck body for fastening the collet. A non-alignment prevention member is provided for suppressing relative movement by bringing the nut into radial contact with the chuck body even when the spindle of the machine tool is rotated and includes a first nut rear end side tapered surface at a farther rear end side than a screw portion, and a chuck body side tapered surface formed in the chuck body for coming into contact with the first nut rear end side tapered surface when the nut is screwed up.

Abstract: The present invention provides an internal thread member and an external thread member that can achieve stable finishing accuracy, can assure a desirable thread overlap, and have sufficient breaking strength and pullout strength. This invention also provides a cutter which can machine internal threads with stable finishing accuracy and can assure improved durability.

Abstract: A joint unit comprises a lock mechanism in which a ball-like joint section provided at the base end of an arm is housed in a holder formed at an end of a cylindrical case. As the joint section is brought into pressed contact against an inner surface of the holder, the lock mechanism locks a pivotal angle. In the lock mechanism, in response to a manual operation of a knob, a bolt is caused to project into the case and this pressing force is transmitted to a roller-like first pressing body and then to a second pressing body placed in contact therewith. Further, the pressing force from the first pressing body is transmitted to a pressure block and then the pressing force from this pressure block brings the joint section into pressed contact against the holder inner surface.

Abstract: It is an object of the invention to provide a tap holder in which even when an error is brought about in synchronizing spindle feeding and rotation of a tapper body and a tap collet of a tap holder in correspondence with a machine tool spindle, the spindle feeding and rotation can be synchronized by absorbing the error by a simple constitution. As means therefor, a tap holder including a tap collet for chucking a tap at one end thereof, a tapper body formed with an attaching hollow portion for inserting other end of the tap collet, and a fastening nut for pressing the tap collet to the attaching hollow portion to be fixed to the tapper body by being screwed with the tapper body and engaged with one end side end face of the tap collet, and attached to a machine tool having a tap synchronizingly feeding mechanism is characterized in that the tap collet is squeezed by a bottom face of the attaching recessed portion and the fastening nut by way of elastic members in an axial direction.

Abstract: It is an object of the invention to provide a tap holder in which even when an error is brought about in synchronizing spindle feeding and rotation of a tapper body and a tap collet of a tap holder in correspondence with a machine tool spindle, the synchronization can be established by absorbing the error by a simple constitution. As means therefor, the tap holder is characterized in that a tapper body and a tap collet are inserted by a locking member at portions of the tapper body and the tap collet overlapping each other, and the tap collet is fixed to the tapper body by engaging the locking member with at least one of the tap collet and the tapper body in a state of being interposed with an elastic member on both sides thereof in an axial direction X.

Abstract: Provided is a cleaner that can clean an inside wall surface defining a hollow portion to be cleaned even if the distance between the center of the hollow portion to the inside wall surface varies; the cleaner being able to adjust the level of pressure (force) applied against the inside wall surface; and being able to clean the inside wall surface by applying optimum pressing force, depending on how dirty the inside wall surface is, and simply by moving the cleaner in a back-and-forth movement direction relative to the hollow portion. The cleaner includes: a shaft 10; and a cleaning portion 20 attached around the outside surface of the shaft 10.

Abstract: An information-holding unit is provided which can minimize increase in cost and which can increase storage capacity as a whole without changing information transferring time. The information-holding unit comprises a plurality of RFID tags with desired specific information stored therein, and a tool holder as a mounting body for mounting these plural RFID tags.

Abstract: The present invention provides a concave part cover that can be easily inserted and be safely secured in a concave part even if tolerances and dimensional errors of the concave part such as a slot or a hole, and of the concave part cover for covering the concave part are large. The concave part cover comprises: a top plate 11 for covering the concave part; and a pair of pressing parts 12A and 12B extending from the top plate 11 and pressing side walls 52A and 52B of the concave part when the pressing parts 12A and 12B are inserted into the concave part. Base ends 15A and 15B of the pressing parts 12A and 12B are positioned at the top plate 11 in such a manner that a distance between the base ends 15A and 15B is shorter than distance W (between the side walls 52A and 52B), and portions of extending parts 16A and 16B of the pressing parts 12A and 12B are formed to project outwards until they are spaced at a wider distance therebetween than the distance W.

Abstract: The present invention provides an internal thread member and an external thread member that can achieve stable finishing accuracy, can assure a desirable thread overlap, and have sufficient breaking strength and pullout strength. This invention also provides a cutter which can machine internal threads with stable finishing accuracy and can assure improved durability.

Abstract: This invention provides a clamping nut which prevents, at the time of rotation of the clamping nut, a fastening force that is imparted in the radial direction of the clamping nut towards the inside of the clamping nut, from operating on a converting part formed on the inner surface of the clamping nut, thereby enhancing rotation efficiency and making it possible to securely clamp a clamp object member. This invention also provides a tool holder with the above-described clamping nut, and a spanner for the fastening of the clamping nut. The clamping nut has an annular groove which takes the form of an annular shape over its outer surface in at least a section of the area on its outer surface that corresponds to a female screw, and which will not come in contact with the spanner.

Abstract: The present invention enhances the lubricating property of the sliding surfaces of a clamp nut and a collet, reduces a friction coefficient, prevents the occurrence of seizure, and enhances durability. Accordingly, it is possible to rotate the clamp nut and the collet without causing vibrations due to imbalance. Moreover, this invention provides a clamp nut that can maintain tool-mounting accuracy for a long period of time even in the case of high-speed rotation, and also provides a collet chuck including such clamp nut. Concerning the clamp nut which is mounted on a collet chuck body for holding tools in the collet and which clamps the collet chuck body and the collet together, at least a part of the clamp nut which comes in contact with the collet is made of oil-bearing metal.

Abstract: The present invention provides a concave part cover that can be easily inserted and be safely secured in a concave part even if tolerances and dimensional errors of the concave part such as a slot or a hole, and of the concave part cover for covering the concave part are large. The concave part cover comprises: a top plate 11 for covering the concave part; and a pair of pressing parts 12A and 12B extending from the top plate 11 and pressing side walls 52A and 52B of the concave part when the pressing parts 12A and 12B are inserted into the concave part. Base ends 15A and 15B of the pressing parts 12A and 12B are positioned at the top plate 11 in such a manner that a distance between the base ends 15A and 15B is shorter than distance W (between the side walls 52A and 52B), and portions of extending parts 16A and 16B of the pressing parts 12A and 12B are formed to project outwards until they are spaced at a wider distance therebetween than the distance W.

Abstract: The present invention provides a collet capable of efficiently supplying a cooling fluid such as a cutting fluid to a tool and thereby realizing satisfactory cooling by adjusting the flow velocity of the cooling fluid according to the diameter of the tool held by the collet. The collet comprises: a collet body for inserting the shank of the tool, a slot formed at least from the tool insertion side, and a weir member inserted into the slot. The weir member extends from a position recessed from the inner surface of the collet body in a direction closer to the outer surface of the collet body and reaches the outer surface thereof, and a gap S through which the fluid can flow is formed between the weir member and the inner surface of the collet body.

Abstract: A tool holder is provided which enables the coupling of a tool holder body, regardless of the size of its outside diameter, to a tapered shank, which is hardly influenced by centrifugal force generated at the time of high-speed rotation, and which can cause elastic deformation of the tapered shank effectively. The tool holder comprises the tapered hollow shank mounted on a machine tool spindle and the tool holder body coupled to the tapered shank. The tapered shank and the tool holder body are coupled to each other in the state where a part of the tapered shank is inserted in the tool holder body.

Abstract: The present invention provides a capped collet and a cap attached to the collet, which are capable of efficiently supplying a cooling fluid to a tool according to the type of the tool held therein, and of performing satisfactory cooling. The capped collet comprises: a collet body 10; a cap 11 which is attached to the top-end side of the collet body 10 in an attachable and detachable manner and which allows the tool to pierce therethrough; and a sealing member 12 placed between a tool holder 101 and the cap 11 in order to hermetically seal a space between them. The collet body 10 has a slot 13 formed at least from the top-end side thereof, and an annular projection 21 which is formed on the top-end side and which is coupled with the cap 11. The cap 1 has an annular groove 18 for coupling with the annular projection 21 of the collet body 10, and a cover 22 for covering the end face of the collet body 10 on the top-end side.

Abstract: The present invention provides a rotatory transmitting mechanism that is capable of decreasing the load imposed at the time of transmission of a rotatory motion without increasing the size of the rotatory transmitting mechanism, and is also capable of extending the life of bearings that support the shafts. This invention also provides a machine tool equipped with this rotatory transmitting mechanism, and further provides a tool holder. The rotatory transmitting mechanism comprises an input shaft 11 and an output shaft 12, whose shaft center O2 intersects with the shaft center O1 of the input shaft 11, and to which a rotatory motion from the input shaft 11 is transmitted. The rotatory transmitting mechanism is equipped with transmitting parts at symmetrical positions with respect to at least one of the shaft centers of the shafts.

Abstract: This invention provides a clamping nut which prevents, at the time of rotation of the clamping nut, a fastening force that is imparted in the radial direction of the clamping nut towards the inside of the clamping nut, from operating on a converting part formed on the inner surface of the clamping nut, thereby enhancing rotation efficiency and making it possible to securely clamp a clamp object member. This invention also provides a tool holder with the above-described clamping nut, and a spanner for the fastening of the clamping nut. The clamping nut has an annular groove which takes the form of an annular shape over its outer surface in at least a section of the area on its outer surface that corresponds to a female screw, and which will not come in contact with the spanner.

Abstract: The present invention provides an information system and an information-holding unit wherein an information carrier with specific information stored therein is mounted on a mounting body of the information-holding unit, and the mounting body is also provided with ID information, thereby making it possible to also use the ID information in order to refer to information about the mounting body. An information system 100 comprises an information carrier with specific information stored therein, and a mounting body for mounting the information carrier, and the information system 100 refers to information about the mounting body on the basis of the specific information. The mounting body is provided with ID information, thereby making it possible to also use the ID information in order to refer to the same information as the information referred to on the basis of the specific information stored in the information carrier.

Abstract: A tool holder is provided which enables the coupling of a tool holder body, regardless of the size of its outside diameter, to a tapered shank, which is hardly influenced by centrifugal force generated at the time of high-speed rotation, and which can cause elastic deformation of the tapered shank effectively. The tool holder comprises the tapered hollow shank mounted on a machine tool spindle and the tool holder body coupled to the tapered shank. The tapered shank and the tool holder body are coupled to each other in the state where a part of the tapered shank is inserted in the tool holder body.