An operation in which a countersink tool enters the workpiece axially and enlarges the top portion of an existing hole to a cone-shaped opening. Countersinking is often performed after drilling to provide space for the head of a fastener, such as a screw, to sit flush with the workpiece surface. ...
An operation in which a reamer enters the workpiece axially and enlarges an existing hole to the diameter of the tool. Reaming removes a minimal amount of material and is often performed after drilling to obtain both a more accurate diameter and a smoother internal finish. A finish reaming ...
An operation in which a counterbore tool enters the workpiece axially and enlarges the top portion of an existing hole to the diameter of the tool. Counterboring is often performed after drilling to provide space for the head of a fastener, such as a bolt, to sit below the surface of a part. The ...
Remelt refers to scrap material that is remelted and then mixed with unused material for reuse. The remelt ratio is the allowable amount of remelt relative to virgin material. The scrap used for remelt can be generated from the mold runners and defective parts. The cost to remelt this material may ...
A machine that rotates a cutting tool at high speeds and moves it into a fixed workpiece to cut away chips of material. A milling machine may be operated manually or by computer numerical control (CNC) to perform a series of operations. Such operations may include face milling, end milling, chamfer ...
The percentage of material from a piece of stock that is used as a workpiece/blank or final part. When cutting from a piece of stock, any material left attached to the stock or lost in the cutting process is considered scrap. Such scrap material includes the sheet border and web width in the case ...
Properties other than mechanical properties, that pertain to the physics of a material and can usually be measured without the application of force; e.g., density, electrical conductivity, thermal expansion, reflectivity, magnetic susceptibility, lattice parameters, etc. This term often has been ...
An operation in which a tap enters the workpiece axially and cuts internal threads into an existing hole. The existing hole is typically drilled by the required tap drill size that will accommodate the desired tap. On a milling machine, the threads may be cut to a specified depth inside the hole ...
