Turning

CNC Turning

CNC Turning is a machining process in which a stationary cutting tool contacts to a rotating work piece in order to form the work piece. In the CNC turning process a bar of material is held in a chuck and rotated while the stationary tool applies cutting pressure to the work piece to remove material to create the desired form.

In CNC turning centers that have both turning and milling capabilities the rotation of the work piece can be stopped and/or manipulated to allow for milling of complex shapes, this is referred to as Mill-Turn. Turning parts on CNC turning centers allows for a wide range of complexities, sizes, and material types.

Pegasus Manufacturing offers CNC turning and mill-turn for precision parts with extreme tolerances down to .00005” and diameters from .100” to 13.0”. Our CNC turning department is focused on providing quality prototyping and production quantities. We make complex machined parts quickly and competitively. We offer this precision process for a wide range of applications.

There are many operations that a CNC turning center can be used for, such as:

Face turning in CNC Turning Center

Face turning is also known as facing operation. In a CNC turning center the work piece is fixed in the chuck then the chuck will rotate the work piece in the desired direction. Then a tool will apply cutting pressure along the perpendicular direction of the axis of the work piece. This process is typically used to produce a squared or perpendicular surface at the end of the work piece material. It can also be used to produce a desired length.

Outside Diameter in CNC Turning Center

Outside dimensional turning allows us to be able to form the work piece in a combination of directions in relation to the center axis of the work piece. The most basic is straight turning, in this process the work piece is rotated in the CNC turning center chuck and then a tool is fed in a parallel direction to the center axis with required depth of cut. Straight turning operation is used to produce a cylindrical surface to a given dimension by removing the material by providing the required depth.

Boring in CNC Turning Center

Boring is essentially identical to outside diameter turning in the sense that the work piece is rotated in the chuck and then a tool is fed in a parallel direction to the center axis with required depth of cut. However, there are fundamental differences as we are now shaping the inside diameter of the work piece with a tool that has a shank that is parallel to the work piece center axis and a cutting point that is perpendicular to the center axis.

Shoulder turning in CNC Turning Center

Shoulder turning is simply adding an additional face/shoulder. In the CNC turning center a work piece that has multiple diameters with no lead-in at the given instance where two different diameters meet at that instance shoulder turning operation is used. There are different types of the shoulder turning. They are: beveled shoulder, radius shoulder, and squared shoulder.

Eccentric/Ellipses turning in CNC Turning Center

If the work piece material has more of a conic section that is not in equal parts when referenced to the center axis, then it is eccentric (ie: a lobe on a camshaft). Cylindrical operation is performed on the different surfaces which is called eccentric turning. The process of eccentric turning is very similar to straight turning but with the addition of another work piece axis that is parallel to the center axis of the work piece. Then to produce the eccentric we remove the excess material by applying a cutting tool to  the required depth. In a CNC turning center we are able to create complex ellipses on multiple diameters.

Grooving in CNC Turning Center

By rotating the work and then applying a single point cutting tool on a axial path we are able to cut grooves into cylindrical forms that can be located on the ID surface, the OD surface, and on the face/shoulder.

Thread cutting in CNC Turning Center

The thread cutting tool moves along the axial direction and they are at an angle of 60 degrees. With the multiple pass of the tool toward the work piece we get the threads. The threads are arranged on the work piece material with specific pitch and specific length.

Drilling/Taping/Reaming in CNC Turning Center

This is the process of cutting/forming holes and cutting threads into the holes.