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What is CNC Turning? Everything you need to know

Views: 4     Author: Site Editor     Publish Time: 2022-07-20      Origin: Site

At Shengqi, we can provide you with professional quality prototypes and small to medium volume custom parts so that you can meet critical deadlines and keep your project moving forward. We do this by providing a one-stop shop for custom manufacturing, which includes CNC milling and CNC turning.

CNC turning

What is CNC Turning?

CNC turning is a metal fabrication process in which parts are held on a rotating spindle that engages a stationary tool to remove material until the part achieves the desired shape.


The critical advantage of CNC turning is that the process can form complex geometries that would otherwise not be available to a CNC milling machine. This is especially true for cylindrical parts or "wave" features that would otherwise be difficult to form on a CNC milling machine. This is not to say that CNC turning can only produce round parts - a variety of geometries can be produced when using a lathe, including square and hexagonal shapes.


CNC Turning Work Range

The working range determines the size of parts we can accommodate in a CNC lathe. Turning equipment is available at Sungai to accommodate a wide range of sizes, including an 8-inch diameter chuck with a 2-inch spindle bore.


Length to Diameter Ratio for CNC Turning

The L/D ratio is an essential part of the design when creating CNC-turned parts. A general rule of thumb is not to exceed an L/D ratio of 5. Exceeding this ratio can cause failure by applying too much force to a part that cannot support it.


At smaller diameters, a smaller L/D ratio is required because the length has a much more significant effect on part deformation. The added stress on slender parts also increases the risk of failure.


Fillet Radius for CNC Turning

At Shengqi, we can reduce the inside corner radius of a turned part to 0.008". However, typically, we use a corner radius of 0.032" or more significantly because of the cost reduction.


CNC Turning Tolerances

For CNC turned parts, Shengqi's default tolerance is +/- 0.005 inches. In some cases, we can sometimes achieve tighter tolerances, depending on your part geometry and the tools we use.


CNC Turning Tools

CNC lathes can use a variety of tools, including reamers, taps, etc. The primary tools used for CNC lathes are different from those used for CNC milling machines. On a CNC milling machine, the tool rotates rapidly to remove the material as it comes in contact with the part. With a CNC lathe, it is a rotating part that is then shaped by a fixed tool.


This means that CNC lathes primarily use fixed tools and inserts to create features on the inside or outside of the part. There are turning tools, also known as outside diameter (OD) tools, or boring bars, also known as inside diameter (ID) tools.


Surface Finishing of CNC Turned Parts

Bare metal finishes:

No finish means that the part comes out of the machine "as is." This means that it will have visible tool marks and scratches. There is no additional cost for unfinished parts, which provides them with the best economy for functional parts that will not show.


A non-finished part can also be considered "finished" if the outside of the part was not touched by the tool during the turning process. If this is the case, the part may have a sticker, stamp, or other material identification from the material supplier.


Vibratory Finishing: This is applied by tumbling your part in an abrasive medium. It produces a smooth surface that is perfect for hiding tool marks on CNC-turned parts.


Media Blast: is another bare metal finishing option. Media blasting is applied by blasting a steady stream of tiny glass beads through compressed air. The result is a flat, non-directional finish that provides excellent aesthetics.


Powdercoat:

Apply powder coatings by spraying a dry, free-flowing powder on your metal parts to provide a durable, high-quality, and multi-color finish. Check out our Powdercoat page for complete details on powder coatings we offer in oatmeal colors and textures.


Suppose you want to make delicate and perfect molds in addition to good equipment. In that case, the experience of the manufacturer is also significant. Suppose you want to customize fine molds and parts to your satisfaction, contact Shengqi. In that case, we are a strong mold manufacturer in China with rich experience and an advanced CNC machining workshop, your reliable mold parts supplier.


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  shengqi-3@dgshengqi.com 
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