A method for producing a medical instrument, includes producing, by cutting material from a semi-finished product, a shaft including a clamping region and at least part of a head including cutting edges; additively generating at least part of the head of the instrument; performing the additively generating with a rotation axis of the instrument aligned vertically; reworking at least part of the head with a subtractive method; and using the subtractive method to perform at least one chosen from sharpening cutting edges and improving concentric running of the instrument.

A method of manufacturing a rotary cutting tool is described. The rotary cutting tool defines a central longitudinal axis and includes a shank portion and a cutting portion adjoining the shank portion. The shank portion has a shank end and the cutting portion has a cutting end opposite the shank end. One or more blades are separated by a flute. A main, internal coolant passage extends from the shank end, through the shank portion, and into the cutting portion. The method includes forming at least one secondary coolant passage in fluid communication with the main, internal coolant passage in which the at least one secondary coolant passage is formed by using electro-magnetic radiation.

A method of manufacturing a rotary cutting tool is described. The rotary cutting tool defines a central longitudinal axis and includes a shank portion and a cutting portion adjoining the shank portion. The shank portion has a shank end and the cutting portion has a cutting end opposite the shank end. One or more blades are separated by a flute. A main, internal coolant passage extends from the shank end, through the shank portion, and into the cutting portion. The method includes forming at least one secondary coolant passage in fluid communication with the main, internal coolant passage in which the at least one secondary coolant passage is formed by using electro-magnetic radiation.

A contoured rake face cutting tool and method of making is disclosed. A rotary cutting tool with a plurality of teeth can cause damage to a work piece during cutting. By orienting the cutting angle of the teeth relative to the rotational central axis to high shear angle such as 50 or 70 degrees, the tool creates a high compression cut which is cleaner and less damaging to the work piece. The cutting surface itself is profiled, i.e. non-planar, such as concave or convex or other non planar shape, which is preferably formed into an ultra-hard material which is supplied for use in a planar form.

A contoured rake face cutting tool and method of making is disclosed. A rotary cutting tool with a plurality of teeth can cause damage to a work piece during cutting. By orienting the cutting angle of the teeth relative to the rotational central axis to high shear angle such as 50 or 70 degrees, the tool creates a high compression cut which is cleaner and less damaging to the work piece. The cutting surface itself is profiled, i.e. non-planar, such as concave or convex or other non planar shape, which is preferably formed into an ultra-hard material which is supplied for use in a planar form.

A cutter build and truing machine (22) comprising a mechanism (52, 54) to position cutting blades (98) by moving the blades in either direction in a mounting slot (96) of a cutter head (94). The machine further includes a torque spindle (62) and driver (66) to automatically tighten or loosen clamp bolts (102).

A cutter build and truing machine (22) comprising a mechanism (52, 54) to position cutting blades (98) by moving the blades in either direction in a mounting slot (96) of a cutter head (94). The machine further includes a torque spindle (62) and driver (66) to automatically tighten or loosen clamp bolts (102).

Square end mill includes long end cutting edge disposed from end portion on outer peripheral side in radial direction to center in the radial direction when a cutting edge portion is viewed from end face side, and short end cutting edges disposed from other end portions on outer peripheral side in radial direction to middles on center side in radial direction, first gashes disposed on regions from lines connecting end portions on center side in radial direction of the short end cutting edges to center in radial direction to the long end cutting edge on rear side in the rotation direction, second and third gashes disposed on rear and front sides in rotation direction of the first gashes, and all gashes formed in curved surface shapes depressed to a shank side on opposite side in axial direction of the cutting edge portion.

A method of manufacturing a rotary cutting tool is described. The rotary cutting tool defines a central longitudinal axis and includes a shank portion and a cutting portion adjoining the shank portion. The shank portion has a shank end and the cutting portion has a cutting end opposite the shank end. One or more blades are separated by a flute. A main, internal coolant passage extends from the shank end, through the shank portion, and into the cutting portion. The method includes forming at least one secondary coolant passage in fluid communication with the main, internal coolant passage in which the at least one secondary coolant passage is formed by using electro-magnetic radiation.

A method of manufacturing a rotary cutting tool is described. The rotary cutting tool defines a central longitudinal axis and includes a shank portion and a cutting portion adjoining the shank portion. The shank portion has a shank end and the cutting portion has a cutting end opposite the shank end. One or more blades are separated by a flute. A main, internal coolant passage extends from the shank end, through the shank portion, and into the cutting portion. The method includes forming at least one secondary coolant passage in fluid communication with the main, internal coolant passage in which the at least one secondary coolant passage is formed by using electro-magnetic radiation.