Abstract: A cutting head for a mill configured to rotate about an axis to remove material from a work piece includes a base surface, a side region connected to the base surface, and a top region connected to the side region. The top region defines a central area and a periphery. A plurality of top teeth are disposed on the top region. The top teeth have cutting edges configured to contact the work piece to remove material. Each cutting edge extends from the central area towards the periphery and includes an axially extending peak portion.

Abstract: A tool is disclosed, including an interchangeable cutting member and an adapter to which said interchangeable cutting member is adapted to be replaceably mounted. The interchangeable cutting member comprises a substantially ball-shaped body with a cutting surface, within which a female screw-thread is provided. The adapter is provided having a male screw-thread portion configured and arranged for screw-engagement in the female screw-thread. A coolant or lubricant fluid passage is provided in the interchangeable cutting member. The coolant or lubricant fluid passage ends at the cutting surface of the ball-shaped member.

Abstract: A method for plunge milling a workpiece. The method includes rotating a cutting head while advancing the cutting head along a direction towards the workpiece; removing material from the workpiece with frontal teeth disposed on a frontal face of the cutting head; bending a tool holder configured to lead the cutting head inside the workpiece; stopping the advancing of the cutting head along the direction towards the workpiece when the cutting head has reached a predetermined depth inside the workpiece; and retrieving while rotating the cutting head from the inside of the workpiece such that side teeth of the cutting head remove material from the inside of the workpiece due to the bending of the tool holder.

Abstract: A cutting head for a mill configured to rotate about an axis to remove material from a work piece includes a base surface, a side region connected to the base surface, and a top region connected to the side region. The top region defines a central area and a periphery. A plurality of top teeth are disposed on the top region. The top teeth have cutting edges configured to contact the work piece to remove material. Each cutting edge extends from the central area towards the periphery and includes an axially extending peak portion.

Abstract: A tool is provided. The tool comprises an interchangeable cutting portion and a holder to which the interchangeable cutting portion is adapted to be replaceably mounted. The interchangeable cutting portion comprises a first part with at least one cutting edge and a second part for connection to the holder, the second part being provided with a conical external abutment surface and an external cylindrical screw thread. The holder is provided with an internal cylindrical screw thread, to which the external screw thread is removably screwed, and a conical internal abutment surface, the conical external abutment surface and the conical internal abutment surface being mutually engageable for positioning the cutting portion and the holder relative to one another.

Abstract: A method for plunge milling a workpiece. The method includes rotating a cutting head while advancing the cutting head along a direction towards the workpiece; removing material from the workpiece with frontal teeth disposed on a frontal face of the cutting head; bending a tool holder configured to lead the cutting head inside the workpiece; stopping the advancing of the cutting head along the direction towards the workpiece when the cutting head has reached a predetermined depth inside the workpiece; and retrieving while rotating the cutting head from the inside of the workpiece such that side teeth of the cutting head remove material from the inside of the workpiece due to the bending of the tool holder.

Abstract: A tool is provided. The tool comprises an interchangeable cutting portion and a holder to which the interchangeable cutting portion is adapted to be replaceably mounted. The interchangeable cutting portion comprises a first part with at least one cutting edge and a second part for connection to the holder, the second part being provided with a conical external abutment surface and an external cylindrical screw thread. The holder is provided with an internal cylindrical screw thread, to which the external screw thread is removably screwed, and a conical internal abutment surface, the conical external abutment surface and the conical internal abutment surface being mutually engageable for positioning the cutting portion and the holder relative to one another.

Abstract: Systems and methods include using a pull stud bolt for connecting a tool holder to a collet in a spindle. The pull stud bolt includes a body configured to receive a tool holder, the body having a longitudinal passage fluidly connected to a cavity, the cavity fluidly connected to a plurality of longitudinal channels; a sealing ring disposed around an end of the longitudinal passage, the sealing ring in contact with the cavity; a spring disposed in the cavity; and a sphere in contact with the spring. The sphere is configured to unblock the end of the longitudinal passage by losing contact with the sealing ring when a first force applied to the sphere from the spring is less than a second force applied by a fluid flowing through the longitudinal passage. The first and second forces are substantially opposite in direction of application.