Abstract: An attachment to a milling machine having a rotary drive, particularly useful for cutting sharp interior corners in a workpiece, comprising a rotary shaft couplable to the rotary drive of the milling machine so as to be rotatable about the shaft's longitudinal axis. The attachment further comprises a conical cutter member having a rotary axis, an apex located on the axis, and at least one external conical surface portion having a leading end at the apex and a trailing end spaced apart from the rotary axis and from the apex along the rotary axis. The conical cutter member has a cutting edge constituting a part of the conical surface portion and extending between the leading and trailing ends thereof. The rotary axis of the conical cutter member is oriented transversely though not perpendicularly to the shaft longitudinal axis. The conical cutter member being coupled to the rotary shaft so as to be rotated about the rotary axis by the shaft, upon the shaft's rotation about the longitudinal axis.

Abstract: A milling head particularly useful for cutting sharp interior corners in a workpiece, includes a rotary shaft coupleable to the rotary drive of a milling machine so as to be rotatable about the shaft longitudinal axis; and a conical cutter member coupled to the rotary shaft so as to be rotated thereby about a rotary axis at an angle with respect to the shaft longitudinal axis. Preferably, the conical cutter member defines a cone angle of 70 degrees, and its rotary axis is 55 degrees with respect to the longitudinal axis of the shaft. The conical cutter member is disposed within a case and is aligned with an opening in the case, such that the external surface of the case, engageable with the workpiece, is effective to align the conical cutter member with respect to the surface of the workpiece to be milled, and to enable the conical cutter member to cut sharp internal corners in all three dimensions.

Abstract: An attachment to a milling machine having a rotary drive, particularly useful for cutting sharp interior corners in a workpiece, comprising a rotary shaft couplable to the rotary drive of the milling machine so as to be rotatable about the shaft's longitudinal axis. The attachment further comprises a conical cutter member having a rotary axis, an apex located on the axis, and at least one external conical surface portion having a leading end at the apex and a trailing end spaced apart from the rotary axis and from the apex along the rotary axis. The conical cutter member has a cutting edge constituting a part of the conical surface portion and extending between the leading and trailing ends thereof. The rotary axis of the conical cutter member is oriented transversely though not perpendicularly to the shaft longitudinal axis. The conical cutter member being coupled to the rotary shaft so as to be rotated about the rotary axis by the shaft, upon the shaft's rotation about the longitudinal axis.

Abstract: A cutter tool for a milling machine head, includes a conical cutter member defining a cone angle of substantially 70°. In one embodiment, the conical cutter member has a pointed apex, and in another embodiment, it has a rounded apex. Also described is an attachment for a milling machine head, wherein the conical cutter member is coupled at an angle of substantially 55° with respect to the axis of the milling machine head.

Abstract: A milling head particularly useful for cutting sharp interior corners in a workpiece, includes a rotary shaft coupleable to the rotary drive of a milling machine so as to be rotatable about the shaft longitudinal axis; and a conical cutter member coupled to the rotary shaft so as to be rotated thereby about a rotary axis at an angle with respect to the shaft longitudinal axis. Preferably, the conical cutter member defines a cone angle of 70 degrees, and its rotary axis is 55 degrees with respect to the longitudinal axis of the shaft The conical cutter member is disposed within a case and is aligned with an opening in the case, such that the external surface of the case, engageable with the workpiece, is effective to align the conical cutter member with respect to the surface of the workpiece to be milled, and to enable the conical cutter member to cut sharp internal corners in all three dimensions.