Abstract: A clamping chuck (1) for radially clamping workpieces with a cylindrical outer clamping surface includes an annular base member (2) which has a hole (5), a shoulder (11), which projects inwards radially and forms a contact surface for the workpiece, an axially-extending hole face (10) and tabs (12) which project inwards radially. Arranged on the base member (2) is a clamping member which is divided into a plurality of substantially L-shaped clamping elements (21), which each include a clamping head (24) arranged in the hole and an actuating lever (27) which extends outwards radially from the clamping head (24). Each clamping head (24) includes, on the outer side thereof, at least one cam (25), which projects outwards radially, engages in a gap between the shoulder (11) and the tabs (12) and is supported radially by the hole face (10) and axially by at least one tab (12).

Abstract: The invention relates to a device for affixing to cylindrical components of medical instruments, for instance an instrumental shaft, having at least one intake part that can be mounted on the cylindrical component and can be affixed to the cylindrical component, wherein a sleeve-shaped collet chuck that essentially coaxially surrounds the cylindrical component is positioned in the intake part and whose inner diameter can be displaced between a span that can slide along the cylindrical component and a span that is in form-locking contiguity on the cylindrical component. To allow for a stationary clamping on the one hand and ensure a non-harmful clamping of the cylindrical component on the other hand, it is proposed with the invention that the inner diameter of the collet chuck can be displaced by a slider that can slide essentially diagonally to the cylindrical component and is mounted so that it can slide in the housing of the intake part.

Abstract: An improved shuck has one end coupling with a fabrication machine through a holding member. The chuck includes a coupling structure, a grip means and a shank. The coupling structure has a first screwing portion at one end and a fastening member at the other end. The grip means has a second screwing portion at one end engageable with the first screwing portion and a plurality of grip jaws at the other end inclined outwards. The coupling structure and the grip means are held in a through hole formed in the shank. The through hole has an internal side to form compact holding of the grip means to firmly hold a tool. After the coupling structure is anchored through the fastening member, the shank can be turned to drive the grip means to move, and the grip jaws can be expanded or contracted to release or grip the tool.

Abstract: A bit holder for a rotary tool is disclosed herein. In one embodiment, the bit holder comprises a drive shaft with an elongated bit channel configured to receive a tool bit for the rotary tool. A cavity is provided in a peripheral wall of the drive shaft. The cavity extends in a radial direction from the bit channel to an outer portion of the drive shaft. A moveable lock member is positioned in the cavity of the drive shaft. A collet is positioned in the bit channel apart from the cavity. The collet includes a collapsible end portion configured to clamp down on the tool bit. A collet nut rotatably engages the drive shaft and is moveable between a release position and a lock position. In the lock position the collet nut clamps the collapsible end portion of the collet while also forcing the lock member into the bit cavity.

Abstract: A failsafe workholding clamping assembly includes a base, an axially slidable draw bar and collet, and a force amplifier. A driver applies a continuous driving force to the force amplifier. The force amplifier amplifies the driving force and applies a resulting amplified force to the draw bar to bias the draw bar toward its closed position and the collet toward its gripping position. A collet opener mounts to the base and selectively applies an opening force to the draw bar to counteract the driving force and move the collet into its released position. The workholding clamping assembly holds a collet in a predetermined rotational orientation and includes a draw bar rotating mechanism to enable an operator to rotate the draw bar to threadingly engage the draw bar and a rotationally-fixed collet.

Abstract: A continuously adjustable collet chuck assembly comprising: a) a collet chuck body, b) an adjustment ring positioned within the collet chuck body, the adjustment ring including fixed key sized and configured to engage a keyway on a collet, and c) a locking member positioned in the collet chuck body to exert a force on the ring, the force having a substantial component in the axial direction to prevent rotation of the ring. The axial force securely fixes the adjustment ring, and therefore the collet, at any rotational position.

Abstract: An apparatus for aligning a machine tool with a target location on a structure. A machine plate positionable on the structure has a plate bushing providing a hole through the plate. The apparatus also includes a nosepiece for guiding a distal end of the tool through the plate bushing to the target location. The nosepiece has a collet configured to be moved at least partly through and sideward in the plate bushing to center the nosepiece on an element projecting from the structure at the target location. The nosepiece can be attached to the plate bushing to establish normality of the tool relative to the projecting element.

Abstract: A mechanically actuated workpiece holding apparatus comprising a collet at least partially composed of a plastic material. The collet may include cantilevered leaves and may be a plastic coating over a metal substrate.

Abstract: The present invention comprises a machining apparatus including a work piece holder having an adapter body with an axial bore and a translating portion located within the axial bore of the adapter body. The translating portion has a proximal end for coupling with a retention knob collet of a spindle and a distal end for attaching to a collet. The work piece holder includes a retaining piece coupling the adapter body and the translating portion allowing the translating portion to move axially within the adapter body. The apparatus facilitates a rotating spindle grasping and rotating a work piece to be brought into contact with a processing tool held stationary on a work table. The present invention also includes a fixture block for attaching milling tools and other devices to a work table and a method of operating a milling machine utilizing the fixture block and work piece holder.

Abstract: To provide a chuck assembly which is superior in practical usability and workability in clamping and fixing a tool to a spindle without fail and with ease by lever-operation of a specialized operational jig, a taper portion is provided on at least one of an inner circumferential wall of the sleeve portion and an outer circumferential wall of the tool clamping portion, the tool clamping portion and the sleeve portion are brought into contact with each other at the taper portion, a retainer portion for retaining the operational jig is provided on the sleeve portion, a support portion is provided in a predetermined position of the chuck assembly body for supporting the operational jig retained at the retainer portion, the sleeve portion retained by the operational jig is slidingly moved relative to the tool clamping portion when the operational jig is lever-operated in a taper direction of the taper portion by using the support portion as a fulcrum, and the opening portion of the tool clamping portion is widened