Abstract: An outboard motor includes a shaft including a second spline that upwardly extends from a housing. The second spline is meshed with a first spline disposed inside either an engine cowl or an upper housing. The second spline includes a distal end and a body. The distal end is provided on an upper end of the shaft. The body is provided below the distal end. In the second spline, a groove width in the circumferential direction at the distal end is larger than a groove width in the circumferential direction at the body.

Abstract: A gear machining method includes: roughing a workpiece while causing a cylindrical hob cutter to rotate in synchronization with a rotation of the workpiece such that a cutting allowance remains; and finishing by cutting off the cutting allowance remaining on the workpiece on which the roughing has been performed during the roughing to form a desired gear shape by feeding a skiving cutter relatively to the workpiece in the rotation axis direction of the workpiece while causing the skiving cutter to rotate in synchronization with the rotation of the workpiece.

Abstract: The invention relates to a method for loading and unloading an internally toothed workpiece or a workpiece that is to be provided with internal toothing into/out of a clamping position, in which the workpiece, which is held by a retaining device, is brought into the clamping position by means of a conveying movement so that said workpiece, when clamped, has internal toothing cut by a gear cutting tool that occupies a cutting chamber and, after cutting, said workpiece, which is held by the retaining device, is returned from the clamping position in a return movement, wherein, prior to cutting, the retaining device is permitted to carry out an evasive movement that is different from the return movement/reverse conveying movement and that frees the cutting chamber, or the cutting chamber is already kept free of the retaining device as soon as the clamping position is reached.

Abstract: To produce toothed sections on workpieces, a machine tool has a machine bed, a pivoting element with at least two workpiece spindles arranged thereon and a tool positioning unit with a tool head. The spindles can be pivoted relative to the machine bed about a workpiece spindle pivot axis and each spindle has a workpiece receiver that can be rotatably driven about a rotational axis. The tool head can be linearly moved in three directions relative to the spindles, and can be pivoted about a tool head pivot axis. A bearing element extending in the direction of the workpiece spindle pivot axis, has a free end which is pivotable about the workpiece spindle pivot axis, and is rigidly arranged on the pivoting element. The reinforcing element is fastened to the machine bed. The pivoting element is reinforced about the workpiece spindle pivot axis by the reinforcing element.

Abstract: A machine tool for processing tooth formations of workpieces, includes a rotary holder which can be rotated about a main axis A, two workpiece spindles which are arranged on the rotary holder, with the workpiece spindles having spindle axes (Sa, Sb) which are orientated parallel with the main axis A, in particular with the workpiece spindles being arranged symmetrically about the main axis A, and a tool holder for a tool for processing a workpiece on one of the workpiece spindles, is characterised in that the main axis A of the rotary holder extends horizontally. With this machine tool, contamination of the rotary holder and tool spindles by removed chips can be reduced and the structural complexity for a relative feed movement of the tool with respect to the workpiece parallel with the spindle axes can be reduced.

Abstract: A gear shaper machine system drives and maneuvers a hone tool to generate teeth geometry in a manner the teeth were machined prior to a hardening process. After heat treatment, the hone tool is indexed to the teeth geometry spacing of the workpiece so as to divide the stock removal evenly between the drive and coast sides. The hone tool may be driven with rotational and reciprocating synchronous teeth generating motion in which the hone tool reciprocates along the length of the teeth parallel to the centerline of the workpiece while the workpiece and hone tool rotate with synchronous motion.

Abstract: A gear production apparatus for producing a gear from a blank includes a blank retainer rotatably supporting and selectively driving the blank about a work axis. An axially moveable first stock supports a first tool for rotation about a first axis extending substantially perpendicular to the work axis. An axially moveable second stock supports a second tool for rotation about the second axis. The second tool is moveable in two additional degrees of freedom such that the second axis is rotatable about a third axis and the second tool is axially translatable along the second axis. The second tool is moveable with the second stock along a line extending substantially perpendicular to and intersecting the work axis. The first stock is moveable to engage the first tool with the blank to form rough teeth. The second stock is moveable to engage the second tool with the blank.

Abstract: A method of machining cylindrical gears with internal or external gearing on a machine with a tool wherein a gear is positioned on a machine, the gear having an axis of rotation (D). The gear is then evaluated to establish a gear guiding axis (F) and the position of the gear guiding axis (F) relative to the axis of rotation (D) is determined. The gear is machined by displacing the tool in the direction of the gear guiding axis (F).

Abstract: A method for the manufacture of a toothed gear from a gear blank wherein the gear blank loaded into a machine tool and rotationally driven is machined by a hobbing cutter disposed on a rotationally driven tool shaft and the rough-hobbed gear, once produced, is subsequently cleared of burr by means of a rotationally driven deburring tool by causing it to chamfer the front-end edges of the inter-teeth grooves, wherein the number of revolutions of said deburring tool and rough-machined gear has a constant ratio, wherein the removal of burr is performed on said rough-machined gear invariably loaded on said machine tool in a continuous pass by using a deburring tool which is similar to a side milling cutter, has cutting teeth, and is fixedly disposed for rotation on the shaft of said hobbing cutter, wherein the front-end edges of the inter-teeth grooves are successively machined in the way of a gear hobbing process, and wherein said shaft is changed from the gear hobbing setting over to a burr removal setting.

Abstract: A cutting machine includes linear electrical actuation for controlling linear reciprocating movement of a spindle and cutting tool. The cutting machine is suited for gear shaping cutting operations and the like. Linear electrical actuation may be used to control position of a hydraulic valve within the spindle, which controls hydraulic actuation and linear movement of the spindle. Linear electrical actuation may also be used to pivot the spindle to relieve the cutting and/or during the cutting stroke for gear crowning operations. A rotary actuator is also disclosed as incorporated into the pivoting saddle of such a cutting machine.

Abstract: A miter saw includes a base, a table rotatably attached to the base, a saw assembly connected to the table, the saw assembly comprising a motor, a blade rotatable about an axis, an upper blade guard for covering an upper part of the blade and having a bottom surface, and a housing connected to the upper blade guard, the housing having a bottom surface disposed below the axis, wherein a first distance between the axis and the bottom surface of the housing and/or the upper blade guard at a first point along the axis near the upper blade guard is smaller than a second distance between the axis and the bottom surface of the housing and/or the upper blade guard at a second point along the axis, the second point being farther away from the upper blade guard than the first point.

Abstract: Machine tool for machining of a rotating workpiece, comprising a tool drive, a workpiece drive for rotatably driving the workpiece, a tool rotationally driven by the tool drive in synchronization with the workpiece for producing a toothing on the workpiece, rotation transmitters for determining rotational condition of the tool and the workpiece, respectively, an electronic control for keeping the workpiece drive and the tool drive in synchronization by respectively associated ones of the rotation transmitters. A positioning motor is associated with one of the two drives for influencing the position of the phases of the two drives, and a sensor element provided in association with one of the two rotation transmitters is rotatably adjustable with respect to a stator of a corresponding one of the drives.

Abstract: A method for the manufacture of gears, in which a gear adapted for meshing with a toothed pinion is formed by means of a disc tool having a cutting edge exactly the same as the contour of the teeth of the pinion; the tool being positioned so that its cutting edge would be coincident, if the gear were meshed with the pinion, with the contour of the teeth of the pinion itself, and is pivoted about an axis perpendicular to its own axis of rotating; about the pivot axis, the gear is moved translationally along a line of action perpendicular to the axis of rotation of the disc tool itself and is rotated about its own axis perpendicular to the line of action; the ratio of the speeds of rotation of the gear about its axis and the speed of pivoting of the disc tool about is axis being variable in dependence on the position of the zone of contact of the disc with the gear.

Abstract: A machine tool for supporting a workpiece during the finishing of a plurality of surfaces has a pair of center support means which are coaxially aligned for rotatably supporting a shaft and gear structure. Bearing support surfaces can be simultaenously machined concentric with the axis of the center supports. A gear finishing tool is supported on another axis which is disposed in nonintersecting relation with the axis of the center supports for simultaenously machining a gear surface.

Abstract: A gear shaping machine includes a cutter mounted at the lower end of a spindle and a worm gear surrounding the spindle. A first guide is provided on the spindle and has axially extending guide flutes formed thereon. A second guide is disposed in surrounding relation to the spindle and has axially extending guide grooves formed in an inner surface for sliding engagement with the spindle guide flutes and helically advancing guide flutes formed in its outer surface for engaging corresponding guide flutes formed in the inner surface of the worm gear. A first adjustable eccentric is coupled to the spindle for controlling the vertical movement thereof and a second adjustable eccentric is coupled to the second guide for selectively controlling its vertical movement.

Abstract: A double helical gear set having a pair of driving pinions meshed with a pair of driven gears, respectively, is aligned by providing accurately aligned integral or demountable pinions on one shaft and aligning the driven gears using a fixture which is operable to locate a keyway or other aligning device on each of the driven gears so that the driven gears can be timed or aligned on their support shaft. The fixture has a hub member which fits in the bore of the gear hub and includes a locating pin engageable with opposed flanks of adjacent teeth at corresponding points on the tooth profile such as the pitch point. The fixture includes interchangeable locating pin support members for use in aligning helical gears having different diametral pitches and helix angles.

Abstract: An apparatus for producing pairs of spur gears by cutting tooth gaps with a rotating end cutter head or face milling cutter, wherein, in order to manufacture the one spur gear, one of the elements--the spur gear or the end cutter head--carries out an arcuate or circular rolling movement about an axis which coincides or approximately coincides with the gear axis of the other gear, and the other gear is produced by a cutting-in depth or plunge cut operation without any rolling movement.