Abstract: A tool post assembly includes a tool post body adapted to be mounted on a machine tool, a carrier block coupled to and movable relative to the tool post body by means of a tenon-and-mortise structure, and a lever pivotally mounted on the tool post body and having a manually operable power end and a weight end which is coupled to the carrier block such that, when the power end is actuated, the carrier block is moved from a normal position to a lifted position so as to quickly displace a tool held thereby away from a workpiece.

Abstract: A twist drill has double margins and a chisel edge angle of between 80 degrees and 100 degrees to maximize hole straightness and to minimize “walking” of the drill upon a workpiece. The drill may be modular having a removable tip body or the drill may be of a solid configuration. A tip body is consumable and may be removed and replaced as required.

Abstract: Machining of aluminum workpieces with diamond or diamond-like carbon-surface coated tools may be conducted in an atmosphere containing hydrogen gas at a partial pressure effective for hydrogen to react with carbon atoms at the surface to form C—H bonds that resist adherence of aluminum to the tool surface. Suitably, hydrogen or a hydrogen-containing gas mixture is confined at the interface of tool and workpieces at the machining site. Hydrogen partial pressure may be determined for a tool-workpiece-machining temperature combination by calculation or experiment.

Abstract: A metal cutting tool has a cutting head releasably mounted on a front end of a tool shank, in a self-clamping manner. The tool shank's forward end is provided with a pair of shank coupling portions, each having a forwardly facing shank support surface. A pocket recess is defined between the shank's coupling portions. Within the pocket recess are a plurality of shank fixation surfaces which are parallel to a longitudinal axis of the tool shank. The cutting head has a cap portion and a fixation portion extending in rearward direction therefrom. The cap portion includes a pair of head segments, each having a rearwardly facing head base surface. The cutting head's fixation portion has a plurality of head fixation surfaces which are parallel to a longitudinal axis of the cutting head.

Abstract: A replaceable drill tip and drill shank combination has a serrated and dowel pinned drill tip and drill shank interface, wherein the drill tip has a serrated bottom surface and a channel for receiving a dowel pin which extends axially from a drill shank, the drill shank having a serrated distal end which engages with the serrations in the bottom surface of the drill tip, and fasteners which extend through the drill tip into the drill shank.

Abstract: Sliding in the body of the chuck are jaws whose external thread is engaged with the internal thread of a nut mounted to rotate on the body. The nut is rotated by a sleeve, allowing the jaws to move. The chuck includes radial locking device which can be actuated by a rotation of the sleeve so as to inhibit rotation of the nut with respect to the body, and axial locking device which can be actuated by an axial movement of the sleeve and make it possible to prevent the radial locking device from being actuated. Sequencing device is designed to prevent the axial locking device from passing into the locked position while the radial locking device is not in the locked position.

Abstract: A controlled atmosphere cutting method and a cutting tool are provided to prevent wear on the cutting tool when cutting is performed on a material for forming an oxide protective film. According to the invention, in a cutting method of supplying gas in an atmosphere of a machining portion to perform cutting when a work piece is cut, gas containing a high concentration of oxygen is supplied as atmospheric gas to bring the machining portion into an oxidized atmosphere, so that an oxide is formed between the cutting edge of a cutting tool 4 and a workpiece and thus a damage and wear are reduced on the tool. The above-mentioned atmospheric gas is oxygen enriched air in which oxygen in the air is condensed, and the atmospheric gas has an oxygen concentration up to 40%, exceeding an oxygen concentration of the air.

Abstract: A hole saw includes a shaft, a hole-cutter and an adjustable outer cutter unit. The shaft has a bottom coupling hole for receiving a pilot drill, a top coupling rod for fastening to a driving tool, and an outer thread extending around the periphery thereof. The hole-cutter has a top center inner thread threaded onto the outer thread of the shaft. The adjustable outer cutter unit has two locating rods perpendicularly affixed to the shaft at two sides in a line and two cutters respectively movably mounted on the locating rods, locked thereto with a respective lock screw and abutted against an outer periphery of said hole-cutter.

Abstract: The present invention relates to a method and apparatus for drilling holes in lenses for making “rimless and pierced-lens” spectacles. According to the invention, the apparatus comprises: a bed (11) carrying a numerically-controlled drill (12) whose drill tool (15) is set on a vertical axis; a reference pointer (30, 33) mounted on the bed (11) to be movable between an active position in which it bears against a lens and a retracted position in which it leaves the lens clear; and a lens support (50) arranged to hold the lens (V) in a substantially horizontal plane, said support resting on a surface (20) that is secured to or integral with the above-mentioned bed (11) while the position of said support can be held stationary relative to said surface.

Abstract: A shank of a rotary-percussion working tool (2) has at least two, diametrically opposite locking grooves (5a, 5b) each having a locking shoulder (11) at an axial locking end (3) and spaced from a free end surface (4) of the shank (1), and an end shoulder (12) axially spaced from the locking shoulder (11) in a direction of a working tool-side end of the shank (1) and spaced from the axial locking end (3) of the shank (1) by a length (L) amounting at least to three times of a guide diameter (D) of the shank (1), and at least two entraining grooves (6a, 6b) mutually tangentially offset with respect to the locking grooves (5a, 5b), opening toward the free end surface (4), and having a tangential groove width (B) and at least one tangential, force application surface (7) extending over a contact length (K).

Abstract: A pocket-hole drilling apparatus for drilling pocket-holes in a workpiece is disclosed. In one embodiment, an initiation switch actuates clamping the workpiece and the movement of a drilling module to cut a pocket-hole. The drilling module has a motor and a step-drill mounted thereon, which is slidably mounted on a guide module. The axis of the drilling module movement intersects work surface. In another embodiment, a movable fence provides the adjustability of pocket-hole depth. In yet another embodiment, two actuator tips are disposed in a fence to prevent the drilling of a pocket-hole through the sidewall of a workpiece. In still another embodiment, a short stroke clamping actuator is used to prevent human finger injury. In still another embodiment, a blower or an ejector pump is used to remove wood chips, wherein the blower is either attached to a drilling motor or to a separate blower motor; the ejector pump is mounted near the drill guide.

Abstract: A pistol grip drill (1) has two control triggers (3 and 9) on its hand grip (4). One trigger (3) controls power to a motor in a casing (2) of the drill and the other trigger (9) initiates a sequence which interchanges the positions of two chucks (20, 21). The chucks (20, 21) are mounted on a forward extension (8) of the casing (2). The extension (8) has two degrees of freedom. It is firstly capable of rotating through ninety degrees about the axis of a pivot (14) to bring the unused chuck to the driving position in front of the casing (2). The second degree of freedom allows the extension to be then rotated about the driving axis of a drill drive shaft (5) so that the displaced chuck is moved from an upwardly-pointing position to a downwardly position directly in front of the pistol grip. The interchanging of the chucks (20, 21) can be controlled by the hand of the user holding the hand grip (4).

Abstract: The present invention relates to a V-notched web formed on a drill insert of a drill tool assembly. The V-notched web allows greater stability and feed rates, while decreasing the heat generated at the insert tip. The present invention is provided by a drill insert comprising a drill insert body having at least two cutting edges, a web between the two cutting edges, and a web thinning notch formed on either side of the web. Each web thinning notch forms a notch cutting edge having a positive rake angle.

Abstract: A ceramic drill bit comprising a cylindrical shank and a shaped portion extending axially in line with the shank and having a free end forming the tip of the bit, a relief face extending from each main cutting edge with a relief angle lying in the range 4° to 10° approximately relative to a plane perpendicular to the axis of rotation of the bit, and two notches forming two secondary cutting faces extending from the central edge with positive cutting angles lying in the range 1° to 7° approximately relative to the axis of rotation of the bit.

Abstract: In adjusting phase for work (W), the operation of mounting/dismounting a reference tool on a spindle (6) is dispensed with and so is a storage space for the reference tool, and besides, it is arranged that the thrust on the work (W) does not directly act on the spindle (6) at the time of this phase adjustment. In a machine tool in which a spindle housing (7) supporting the specifically directed spindle (6) for rotation alone is supported for parallel motion in orthogonal three-axis directions (XYZ) by a numerical control mechanism (4), in determining the phase for the work (W) is feed-rotated around a specific axis (S), it is arranged that with a reference block (9) fixed to the spindle housing (7), the work (W) is feed-rotated around the specific axis (S) to abut the phase reference section (W1) of the work against the reference block (9), so as to find the amount of feed-rotation of the work at the time of this abutment.

Abstract: A shrink fit tool holder includes a shank or body that includes a tool holder portion, a flange member, a tapered outer surface that generally corresponds to a tapered bore of a spindle, and a central bore or aperture for accommodating a cutting tool. The central bore includes a plurality of grooves formed in a predetermined pattern that decrease a surface contact area between the tool holder portion and the cutting tool, thereby reducing an amount of conductive heat transfer between the tool holder portion and the cutting tool. As a result, there is less expansion in the tool shank relative to the tool holder.

Abstract: An electric drill (10) has a drive assembly (31, 70), and a pivot head (32) having first and second bit gripping assemblies (14, 22) disposed at 90 degrees to each other. The electric drill (10) also includes means for adjusting the position of the bit gripping assemblies (14, 22) relative to the drive assembly (31, 70) by pivoting the head (32) through 90 degrees, whereby a selected one of the bit gripping assemblies is operatively engaged to the drive assembly. The position adjusting means may include a movable locking sleeve (36) which, in a first position, allows the drive assembly to operatively engage the selected bit gripping assembly and, in a second position, allows the drive assembly to disengage the selected bit gripping assembly.

Abstract: A deburring tool includes a blade having a cutting head portion, an anchor portion, and a retention spring. An arbor is adapted to removably mount the blade such that the head portion of the blade is adapted to be elevated a predetermined distance from the arbor in an unstressed condition of the blade. The blade is sufficiently resiliently yieldable such that the head portion of the blade can move inwardly relative to the arbor during deburring operations. A holder is adapted to mount the arbor and an adjustment member adapted to operatively engage the anchor portion of the blade. The anchor portion of the blade is adapted to move in response to adjustment of the adjustment member in a direction substantially opposite that of the head portion and flex to elevate the head portion relative to the arbor for deburring operations or recess the head portion relative to the arbor.

Abstract: Drilling template include a generally planar member comprising at least one mechanism for guiding a drill. The at least one mechanism is structured and arranged to align a drilling machine having the drill. The generally planar member has at least two layers which can more with respect to each other. The drilling template is capable of assuming at least one configuration when the at least two layers are prevented from moving with respect to each other. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Abstract: A tool includes a tool body and a cutting portion detachably mounted thereon, the tool being rotatable about a longitudinal center axis. The tool body includes flutes formed in an outer surface thereof, and a pair of forward projections at a front end thereof. The cutting portion includes front flutes formed in an external side thereof, and a pair of recesses extending circumferentially in communication with respective ones of the front flutes. To connect the cutting portion to the tool body, the cutting portion and tool body are converged longitudinally so that the projections enter the front flutes. Then, relative rotation is produced between the cutting portion and tool body to align the front flutes with the rear flutes while causing the projections to enter the recesses and form therewith a bayonet coupling.