Common Terms in the Screw Machining Industry
A chamber that allows the feeding of bar stock, one at a time, into a machine.
A sophisticated CNC machine that specializes in turning, boring, drilling, and threading operations, all at the same location.
The linear movement of a cutting tool into a part to remove material.
A machine component that traces the outline of a cam and thus controls the way a workpiece is cut.
The end of a lathe that holds the spindle and the drive that rotates the work-piece.
An imaginary line that passes through the center of an object and is parallel to the floor.
A machine tool commonly used to create cylindrical parts. A lathe holds a cylindrical work-piece on one or both ends. The cutting tool is gradually passed along the surface of the rotating part.
The primary source of power that is located in the base of a lathe.
A safety device that disengages the drive shaft from the motor.
An automatic bar machine that contains more than one spindle, usually 4, 6, or 8. Multiple spindles allow multiple tools to cut multiple workpieces simultaneously.
An operation performed on a lathe that feeds a tool to create an angled edge on the work-piece.
An operation performed on a lathe that cuts a long, spiraling ridge down the outer surface of a work-piece.
A cutting operation that takes place on the outer surface of a cylindrical work-piece.
A tool approach that runs perpendicular to the axis of a work-piece. Also called the perpendicular orientation.
The process of using a multi-point tool to smooth the interior surface of a hole.
Time that is spent setting up the fixtures and tooling, calculating tool offsets, and performing all the necessary tasks to produce the first accurate part.
A cutting tool that uses a single cutting edge to remove material.
An automatic bar machine that contains one spindle. The spindle rotates one piece of bar stock, which is cut by one tool at any given time.
The part of the machine tool that spins. On a screw machine, the spindle holds the work-piece.
A modified automated turret lathe distinguished by a sliding headstock and fixed bushing. Swiss-type machines are capable of creating very small parts with excellent tolerances.
A device located at the end of a lathe opposite the headstock that supports the end of longer work-pieces.
The process of cutting internal threads in a work-piece with a multi-point tool.
An unwanted but acceptable deviation from a given dimension. Tolerances indicate the allowable difference between a physical feature and its intended design.
A machining operation used to make cylindrical parts. A single-point cutting tool passes along the outer surface of a cylindrical work-piece as it rotates and gradually removes a layer of material.
The component of a lathe that holds a number of cutting tools. The turret rotates to place tools in the cutting position.
A lathe with a mounted device that holds multiple cutting tools. The turret rotates to position one specific cutting tool in place after another.
A turning machine in which the spindle is perpendicular to the ground floor. Vertical turning machines are often used for very large or heavy parts.
A device used to locate and hold a work-piece in place.