Abstract: A portable electrical drilling assembly includes an electric motor rotating a gear contained within a gear box housing, a connector coupling the gear to a splined shaft with the splined shaft extending within and engaging an internal surface of a cutter or reamer with the shaft and cutter/reamer defining a cutter-spline drive, and a pivoting feed mechanism coupled to the gear box housing to move a spindle for receiving the cutter or reamer. The gear rotation rotates the splined shaft and reamer/cutter to drill/ream a hole, with the pivoting of the feed mechanism controlling the depth of the drilled or reamed hole. The separate coupling of the splined shaft and cutter/reamer and interchangeability of cutters/reamers allows the assembly to be used in a confined space while still achieving deep drilling of holes in workpieces. The cutter-spline drive can also be used in other drilling assemblies.

Abstract: A magnetically mountable portable drill assembly includes a magnetic base adapted to be mountable to a working surface, a housing coupled to the magnetic base, a motor coupled to the housing, an arbor coupled to the motor for rotation by the motor, a cutter coupled to the arbor for rotation with the arbor and adapted to cut the working surface or a workpiece supported on the working surface, the magnetic base having a front surface facing the cutter, and an illuminator coupled to the magnetic base to emit light from the front surface of the magnetic base for illuminating an end of the cutter and either one of the working surface and the workpiece.

Abstract: A rail shoe assembly for mounting a drilling machine to a rail of a railway track, with the drilling machine including a drill, a cutter, and a support frame with the support frame mounted to the rail, includes a base adapted to be positioned with respect to the rail and adapted to be coupled to the support frame. The rail shoe assembly also includes an adjustable bar coupled to and slideable relative to the base. The adjustable bar has a bottom edge for engagement with the rail. The adjustable bar defines a plurality of position indicators and the base defines a plurality of mounting chambers. At least one of the plurality of position indicators and at least one of the plurality of mounting chambers are alignable at a predetermined position for positioning said base relative to the rail such that the drill and cutter are positioned relative to the rail.

Abstract: A cutter is for driven engagement with an arbor having one of an extending member and a pair of set screws. The cutter includes a shank portion having a central axis and a cutting portion extending from the shank portion along the central axis. A retaining recess is formed in the shank portion for selectively receiving the extending member of the arbor when the arbor is configured to have the driving device. A pair of flats are each formed in the shank portion for engaging the set screws when the arbor is configured to have the set screws. One of the flats extends in a first plane and the other of the flats extends in a second plane perpendicular to the first plane.

Abstract: A cutter is for driven engagement with a driving device of an arbor. The cutter includes a shank portion having a central axis and extends along the central axis between a first end and a second end. A cutting portion extends from the first end of the shank portion. The shank portion defines an entry channel extending from the second end for guiding the driving device of the arbor during insertion of the shank portion into the arbor. The shank portion also defines a retaining channel extending from the entry channel for selectively retaining the driving device of the arbor. Each of the entry and retaining channels have a trough portion extending toward the central axis. The trough portions of each of the entry and retaining channels have a common configuration for slideably receiving the driving device.

Abstract: A cutter is for driven engagement with a driving device of an arbor. The cutter includes a shank portion having a central axis and extends along the central axis between a first end and a second end. A cutting portion extends from the first end of the shank portion. The shank portion defines an entry channel extending from the second end for guiding the driving device of the arbor during insertion of the shank portion into the arbor. The shank portion also defines a retaining channel extending from the entry channel for selectively retaining the driving device of the arbor. Each of the entry and retaining channels have a trough portion extending toward the central axis. The trough portions of each of the entry and retaining channels have a common configuration for slideably receiving the driving device.

Abstract: A cutter is for driven engagement with an arbor having one of an extending member and a pair of set screws. The cutter includes a shank portion having a central axis and a cutting portion extending from the shank portion along the central axis. A retaining recess is formed in the shank portion for selectively receiving the extending member of the arbor when the arbor is configured to have the driving device. A pair of flats are each formed in the shank portion for engaging the set screws when the arbor is configured to have the set screws. One of the flats extends in a first plane and the other of the flats extends in a second plane perpendicular to the first plane.

Abstract: The present invention discloses an annular hole cutter particularly useful for cutting railroad rails. Railroad rails are extremely hard and normally require drills or cutters which have carbide inserts. The present invention provides uniquely designed cutter with an improved cutter geometry, flute design and thin wall construction to allow the annular cutter to be used with a lower horsepower drill motor making the drill motor portable resulting in a portable rail cutting system.

Abstract: A magnetic based drill assembly comprising a support platform mounted to the magnetic base for attachment to a work piece includes a feed mechanism operatively connected to the platform for rectilinear movement between a fully retracted position and a fully extended position. The feed mechanism includes a splined collar slidably mounted to the splined arbor for movement relative to the splined arbor and for rotatably supporting a drive tool. The motor is mounted in a stationary position offset and substantially parallel to the feed mechanism to reduce overall height and weight of the drill assembly. As the splined arbor is located within a cylindrical feed arbor a liquid coolant can be directly injected on the drill tool and workpiece during operation of the drill assembly. Further, an electrical feed rate monitor provides a signal to the user to indicate the optimal feed rate of the drill tool.

Abstract: An annular hole cutter of the type having an annular wall with teeth spaced around the lower end and flutes around its outer periphery. The web thickness between the flutes is about one-half the wall thickness. Each tooth has two circumferentially staggered cutting edges and oppositely inclined inner and outer back-off faces at the bottom thereof. The web is reduced in thickness at each tooth so that the inner cutting edge has a width of about one-third the wall thickness and the outer cutting edge has a width of about two-thirds the wall thickness. The inner and outer back-off faces are alternately vertically relieved so that each tooth produces either one or two chips, each of which is substantially narrower than the depth of the flutes which provide the escape path for the chips.