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CNC is the abbreviation of "computer numerical control", CNC machining is a kind of manufacturing process that instructs the operation of equipment and tools through programmed computer. This process can control various complicated machinery, such as CNC milling machine, CNC lathe, CNC laser machine, water jet machine, electric discharge machine (EDM), to complete the three-dimensional cutting task.
After activating the CNC system, the product file will be programmed into the software
and assigned to the corresponding tools and machinery. These tools and machinery will perform the
specified cutting tasks. The CNC machining process includes the following stages:
- Design CAD Model
- Convert CAD file to CNC program
- Prepare CNC machine and tools
- CNC Machining operations
- CNC Milling: Use a multi-point rotating tool to remove material from the workpiece. Basic mills consist of a 3-axis system (X, Y and Z), which is still one of the most popular and widely used machining processes. In 3-axis machining, the workpiece remains fixed, and the rotating tool cuts along the x, y, and z axes. Meanwhile, most newer mills can accommodate two additional axis, 4-axis CNC machining and 5-axis CNC machining have higher versatility, and they are often used in the production of high-precision parts.
- CNC Turning: Use a single-point cutting tools to remove material from the rotating workpiece. In CNC turning, the CNC machine, typically a lathe or turning machine, feeds the cutting tool in a linear motion along the surface of the rotating workpiece, removing material around the circumference until the desired diameter is achieved. Most CNC lathes consist of two axis, X and Z.
A variety of CNC machined metal and plastic part options are available for an instant online quote. If you do not see the material stock you are looking for, please choose "Custom" under the material drop-down on your quote page and submit for an expert engineering review once you have specified features, tolerances, inspection needs, and quantities required.
|Part Length||Orientation and Form Tolerance||Angularity Tolerance|
|0 to 12"(300 mm)||+/- 0.005" (0.125 mm)||Angularity +/- ½ degree|
|12" to 24"(600 mm)||+/- 0.010" (0.250 mm)||Angularity +/- ½ degree|
|24" - 36"(900 mm)||+/- 1/64" (0.016")(0.400 mm)||Angularity +/- 1 degree|
|36" - 60"(1500 mm)||+/- 1/32" (0.031")||Angularity +/- 1 degree|
|Over 60"||+/- 1/16" (0.063")||Angularity +/- 1 degree|
|Item||Part size / dimension|
|Maximal part size||1000 mm (40in)|
|Minimal part size||2 mm (0.08 in)|
|Minimal diameter||0.3 mm (0.01 in)|