A cutting tool for use in an orbital drilling machine may include a cutting-tool body having a longitudinal axis and a plurality of cutting edges supported on the cutting-tool body and distributed circumferentially around the cutting-tool body. Each cutting edge may extend along the longitudinal axis in a respective helix. A circumferential spacing may be defined between each pair of circumferentially adjacent cutting edges for each position of the longitudinal axis along which the cutting edges extend. The circumferential spacing between at least first and second cutting edges of the plurality of cutting edges may be different at spaced-apart first and second positions along the longitudinal axis.

Connector inserts and other structures that have a high signal integrity and low insertion loss, are reliable, and are readily manufactured. One example may provide a connector insert formed primarily using a printed circuit board. Contacts on the connector insert may be akin to contacts on a printed circuit board and they may connect to traces having matched impedances on the printed circuit board in order to improve signal integrity and reduce insertion loss. The printed circuit board may be manufactured in a manner for increased reliability. Plating, solder block, and other manufacturing steps that are native to printed circuit board manufacturing may be employed to improve manufacturability. Specialized tools that may provide a chamfered edge on the connector inserts may be employed.

A cutting tool cover set to a cutting tool which includes a hollow shaft body and at least one insert attached to an end face of the shaft body and cuts by bringing the insert into contact with a work while rotating the shaft body. The cutting tool cover includes: a body portion fixed to a top end portion of the shaft body; and an extension portion extended outward from the circumferential edge of the body portion in the entire circumference of the top end portion of the body portion to cover the surface of the work.

A milling cutter includes a cutting section extending from a shank along an axis. The shank includes a free end as a first end of the milling cutter. The cutting section includes a free end as a second end of the milling cutter. The cutting section includes at least one right-hand cutting unit, at least one left-hand cutting unit and at least two grooves about the axis. Each of the grooves is made between the right-hand cutting unit and the left-hand cutting unit. The right-hand cutting unit includes several right-hand blades extending at a first helical angle relative to the axis. The left-hand cutting unit includes several left-hand blades extending at a second helical angle relative to the axis.

A machine tool includes a machine bed, a tool clamping portion which is arranged on the machine bed and serves to clamp a workpiece on the machine tool, a swivel arm receiving portion arranged on the machine bed, a first swivel arm pivotally mounted on the swivel arm receiving portion about a first axis of rotation, a second swivel arm pivotally mounted on the first swivel arm about a second axis of rotation, a spindle carrier arm rotatably mounted on the second swivel arm about a third axis of rotation, a milling head rotatably mounted on the spindle carrier arm about a fourth axis of rotation, and a work spindle which is held on the milling head and serves to receive a tool, wherein the third axis of rotation is aligned perpendicularly or transversely to the fourth axis of rotation.

A milling tool for milling workpieces, having a shank which can be rotated about an axis of rotation and at least one milling portion arranged on the shank along the axis of rotation. The milling portion first and second cutters arranged on the circumference and extending substantially over the milling portion in the direction of the axis of rotation and next to one another and/or one behind another as viewed in the direction of rotation/circumferential direction. The first cutter is arranged at a first angle and the second cutter is arranged at a second angle with respect to the axis of rotation. The first angle is not equal to the second angle. A first chip receptacle for receiving a chip of the workpiece that has been cut off is arranged at least between the first and the second cutter.

Rotary cutting tool (100) having plurality of major flutes (130) arranged helically opposite to plurality of discontinuous minor flutes (135) and intersecting to form plurality of teeth. Each tooth includes a first cutting edge formed with the major flute and a second cutting edge formed with the minor flute, the first and second cutting edges meeting at an apex and form part of a periphery of a quadrilateral-shaped face portion. The face portion has non-planar surfaces extending from the respective first and second cutting edges that define a relief surface of each cutting edge. First and second cutting edges are arranged on an imaginary cylinder having a center axis coaxial with the axis of rotation of the tool and respective relief surfaces are radially inward of a surface of the imaginary cylinder such that the first and second cutting edges each have a clearance in a rotational direction of the tool.

One aspect of the disclosure relates to a cutting tool for forming a final opening in a stack that includes at least two layers and a pilot opening having a pilot-opening dimension and extending through at least one of the at least two layers. The cutting tool includes a shank. The cutting tool also includes a first portion including at least one of a first coating or the first coating and a second coating, wherein the first coating at least partially covers the first portion. The cutting tool also includes a second portion between the shank and the first portion, wherein the second portion includes the second coating, and wherein the second coating at least partially covers the second portion.

A milling and boring tool with a tool shaft which comprises a center axis, at least one geometrically defined rough cutter and at least one geometrically defined finishing cutter, and the at least one rough cutter and the at least one finishing cutter respectively comprise a chip groove. The milling and boring tool is characterized in that the chip groove of the at least one finish machining cutter has an opposite twist than the chip groove of the at least one rough cutter.

A tool for machining a wall of a workpiece, made from a composite material, that can cut a groove in the wall, the tool including a head mounted integrally with a rod having a longitudinal axis and capable of being driven in rotation about the longitudinal axis. The head includes at least one main protruding annular rib with an outer surface covered with abrasive grains of predetermined particle size and with a radial height corresponding to the depth of the groove to be cut, and at least one auxiliary protruding annular rib with an outer surface covered with abrasive grains of predetermined particle size and with a radial height less than the radial height of a main rib. The auxiliary rib includes two circular ridges separated by a ring band that is flat and that can be conical in shape.