Abstract: The dowel hole drilling machine comprises a workpiece support. One part of the workpiece support and a crosspiece carrying the drilling unit are mounted to be pivotally movable in unison about an axis. That workpiece support comprises eccentrically mounted supports, which are adapted to be aligned and flush with the workpiece support and to protrude beyond a workpiece support, which extends at right angles to the workpiece support and is spaced the same distance from the pivotal axis as the workpiece support. The workpiece support serves to support the workpiece during a horizontal drilling operation. When the drilling unit is in a vertical position, the stops are flush with the workpiece support and serve as stops for the drilling of the first row of dowel holes. This results in an exact coordination of the drill and the workpiece support, which constitutes a stop for and defines the location of the reference edge during the horizontal and vertical drilling operations.

Abstract: A horizontal drilling and milling machine having a spindle head which is rotatable about an axis set at 45.degree. relative to the horizontal. In the horizontal and vertical working positions of the spindle sleeve, the spindle head can be arrested via a support housing. In its horizontal working position, the spindle sleeve is rotatably driven exclusively by a spur gear system, and in its vertical working position is rotatably driven with the aid of a bevel gear system.

Abstract: A horizontal drilling and milling machine having a spindle head which can be rotated about an axis set at 45.degree. to a horizontal plane. The spindle head can be arrested in the horizontal and vertical working positions of the spindle sleeve by means of a support housing. The spindle sleeve can be driven via a gear system. The rotary movement of the spindle head is derived from the drive shaft for the spindle sleeve.

Abstract: An apparatus and method for aligning an internal combustion engine block to be bored by a vertically movable boring tool so that the center of rotation of a crankshaft to be mounted within the engine block is perpendicular to the direction of vertical movement of the tool.

Abstract: A coupling arrangement for mounting a drill jig in selected position on a Hardinge-type fixture. An arm carries a drill bushing, through which the drill passes into a workpiece held by a Hardinge fixture. Adjustment of the arm relative to the fixture is provided by the use of gauging blocks which enable the arm to be preset. The coupling arrangement assures proper movement and location of the bushing relative to the fixture.

Abstract: Disclosed is an apparatus for permitting automatic and manual machining of critical wear surfaces of railroad truck side frames. A fixture is rotatably mounted on a base. The railroad truck side frame is mounted on the fixture with the fixture and side frame in a first or vertical position. The side frame is first leveled vertically on the fixture with respect to leveling plates and then aligned horizontally before it is rigidly clamped to the fixture. Pivotably mounted gauges are then used to determine the exact location of the pedestal roof areas of the side frame with respect to the fixture, and this positional information from the gauges is manually transferred to adjustable stop dogs that engage limit switches that control the movement of a machining head. The fixture is then rotated 90.degree. and locked in that position.

Abstract: A work preparation and ruling machine is provided for the production of semi-cylindrical rotary dies. The machine comprises a longitudinal cylinder mounted for rotation in frame and being provided with a series of equally spaced longitudinal rows of holes which are radially formed therein. An end wheel, of the same diameter as a finished die, is coaxially secured to one end of the cylinder and includes a first positioning means whereby the cylinder can be rotated by a distance equal to the distance between each two longitudinal rows of holes. A guide bar mounted above and parallel to the longitudinal axis of the cylinder is provided with a pair of carriages, one carrying drilling and cutting means for drilling holes in the die and for squaring it up and the second carriage includes a pen holding fixture to keep the pen aligned with the axis of the cylinder and includes means for measuring the horizontal dimensions of the layout.

Abstract: An indexing head has a plurality of co-axial discs rotatable relative to each other. A first disc carries an indexing pin receivable in a series of equi-angularly spaced recesses of a second disc. A third disc is angularly settable relative to the second disc by means of gauge blocks, and is lockable after setting by locking means. A tool shank can be releasably held in an axial bore of the first disc. When used in an oil bath of an erosion machine, the head is fitted with a bellows skirt to prevent the oil reaching the discs.

Abstract: A device for supporting piano hammers for drilling a stem supporting opening therethrough which includes adjusting elements that serve to selectively locate the hammer supporting portion of the device in a preselected position to effect drilling an opening which will extend through the longitudinal axis of a piano hammer and at any desired angle relative to a plane normal with this axis.