Abstract: The chuck includes a slitted body with an axial bore that holds the tool shank during rotation of the chuck. A gripping sleeve applies compressive pressure via cam elements to reduce the diameter of the axial bore. A spring biased locking sleeve can activate locking elements to lock the gripping sleeve to the body member in the locked position.An engagement mechanism connects the chuck to a drive spindle and also has a mounting mechanism for facilitating automated mounting of the chuck to a drive spindle.

Abstract: An automatic output shaft locking mechanism for electric tools, and particularly a locking mechanism in which the output shaft is driven by electric power and will automatically lock in position when it is turned by an external force, including a retaining end with three equi-angular projections at one end of the output shaft in the tool, and a rotary disk having three equi-angular notches at an outer side. The outer portion of the rotary disk is fitted with a securing ring, and its three notches receive lock rollers respectively. When the retaining end turns, the three projections will push the lock rollers to engage the securing ring so that the output shaft is locked in position.

Abstract: A quick-change chuck device has a body member having a recess defined therein for receipt of a circular tool shank. The body member includes a number of tapered slots defined therein in communication with the recess. An outer sleeve member is coaxial about the body member and axially movable relative to the body member. An axial spring mechanism is disposed between the sleeve member and the body member so as to bias the sleeve member longitudinally relative to the body member to a biased position. The sleeve member is axially movable against the biasing force of the spring mechanism to a released position. Tapered pins are seated within each tapered slot. The tapered pins contact a pin engaging surface defined on the inner diameter of the outer sleeve and are forced radially inward within the slots so as to extend into the recess in the biased position of the outer sleeve.

Abstract: A quick release chuck device includes a body member having an internal bore for receipt of a tool shank. The body member is matable to a drive spindle. A plurality of circumferentially spaced passages are defined in the body member, with each passage defining an opening into the internal bore. Bearing members are disposed in the passages and are radially movable within the passages so that at least a portion of each bearing member extends into the internal bore. An outer sleeve is disposed about the body member and the bearing members. The sleeve is rotatable relative to the body member between a gripping position and a released position. The outer sleeve has an inner diameter surface with ramping engaging surfaces defined therein which are spaced so as to engage the bearing members and force the bearing members radially inward to positively grip a tool shank disposed in the internal bore when the outer sleeve is rotated to its gripping position.

Abstract: A tool mounting apparatus comprises a main shaft including an insertion hole and a stop flange, and an insertion part including a main body, an annular engage member disposed around the main body, wedge members and an annular clamp member disposed outside the annular engage member and biased in the axial direction. When the main body with a tool mounted is put in and abuts the insertion hole and lock nails formed on the annular engage member engage the stop flange, the wedge members are held firmly by the annular clamp member in the bottom portion of the space between a first receive wall provided on the main body and a second receive wall provided on the annular engage member. The tensile force exerted from a work piece through the first wall, the wedge members, the second wall and the lock nails is borne by the stop flange and does not move the tool.

Abstract: A connection system for connecting an interchangeable tool head to the spindle of a numerically controlled machine includes radially displaceable wedge members which when actuated radially to an outer clamping position provide for a clamping connection between the spindle and the tool head. When actuated to an inner release position the system allows for withdrawal of the tool head from the spindle. The wedge members are displaced by a central actuating rod connected to the wedge members via cam means such that the wedge members are positively driven by the cam means in both radial directions of movement.

Abstract: A drill chuck is provided for surgical drilling machines in which the entire chuck is made of material permeable to X-radiation.

Abstract: A drilling and chipping tool (1) has a holder (3) detachably connectable on a neck (2) on the tool (1) and the holder (3) includes a cap (4) arranged to fit over the neck (2). The tool (1) has a long direction and the cap (4) has teeth (5, 5a) on an interior surface detachably engageable with teeth (2a) on an exterior surface of the neck (2). A part (5a) of the interior teeth (5, 5a) on the cap (4) is offsettable relative to the remaining teeth (5) on the cap (4) and is engageable into at least one recess (2b) in the region of the teeth (2a) on the neck, whereby a tolerance free connection is established between the holder (3) and the neck (2) of the tool (1). The holder (3) can be attached and detached from the neck (2) without the use of any other tools.

Abstract: A chuck is provided for receiving and holding inserts having a non-circular shaft. The chuck includes a body having a non-circular cavity, and a capping sleeve rotatable on the body and extending beyond an end of the body. A locking plate is provided in the portion of the capping sleeve which extends beyond the end of the body, the locking plate having a non-circular opening with a profile corresponding to the profile of the cavity. The capping sleeve may be rotated relative to the body to the place the profile of the locking plate selectively in registry, or not, with the profile of the cavity.

Abstract: The quick-fastening device comprises only two parts separable during the fitting and removal of the bit, the first part being fixed to the tool and the second part being fixed to a motor-drive body. The axial locking and the rotational locking are ensured respectively by screwing and the engagement of two profiled ends of matching profiles.

Abstract: A portable grinder (10) has a motor-driven drive shaft (15) and a quick-acting chucking device for a grinding tool (43), which comprises a spindle (20), coaxial with the drive shaft (15), which is braced against the drive shaft (15) by a spring (24) in the axial direction and can be displaced in the axial direction relative to the drive shaft (15) by means of a clamping lever (32). One external free end of the spindle (20) retains the grinding tool (43), which in a released position--with the free end of the spindle (20) extended and the spring (24) tensioned--can be removed from the free end, and in a tightened position--with the free end of the spindle (20) retracted and the spring (24) partly relaxed--is non-rotatably joined to the drive shaft. The free end is configured as a bayonet end (40) which extends though the grinding tool (43). An attachment collet (41) with a bayonet opening can be placed from outside onto the bayonet end (40).