What are the Benefits of CNC Precision Machining?

Tight Tolerances

Tight tolerances are the primary reason to use CNC precision machining. Tolerance is also known as dimensional accuracy. It refers to the slight deviation in the size of a machined part from its CAD blueprints. CNC precision machining uses specialized processes and cutting tools to reduce the tolerances to the minimum values possible. This leads to higher accuracy of the parts compared to the original blueprints.

What are precision machining tolerances?

There are four different types of machining tolerances in generally performed precision machining:

• Unilateral Tolerances: In this type of tolerance, variation in dimensions is permitted in a single direction. The tolerance limit can either be above or below the intended size.
• Bilateral Tolerances: In this type of tolerance, variation in dimensions is permitted in both directions. It is accepted for the tolerance limit to be both above or below the intended size.
• Compound Tolerances: Compound tolerance is the final tolerance calculated after adding or subtracting the tolerances of different dimensions that make up a part.
• Limit Dimensions: The upper and lower dimensional limit is defined instead of defining the required dimensional size. For instance, it is preset that the dimension can fall in the range of 20 mm to 22 mm.

High Accuracy

The tight tolerances directly infer that the final product created by precision machining will have high accuracy. Precision machining is generally performed for parts that require interworking with other parts and components. Therefore, high accuracy becomes essential for these particular parts to work flawlessly in later stages.

High Repeatability

The concept of repeatability is one of the important foundation stones for modern manufacturing industries. Every part manufactured by a process is intended to look like every other part for the end user. Any deviation from this reproduction is often considered a defect. Precision machining is appealing in this regard. With high precision CNC machining, every part is identical to the original with negligible deviations.

Low Production Costs

Due to the lack of deviations in precision machining, there are fewer defective productions. So the process leads to a lower rejection rate of parts. Therefore, the cost of materials is lower. Additionally, being an automated computer-aided manufacturing process results in reduced labor costs. The combined reduction in labor costs and material costs means that the production costs of CNC machining are lower than any alternatives.

Speed and Efficiency

Precision machining involves high-speed robotics that can create parts faster than manual manufacturing on conventional lathes. Additionally, the parts have high accuracy and close tolerance finishes, so there is no need for secondary processes. This leads to faster production times, increasing the workshop’s productivity and efficiency.

Safety

A CNC machine replaces human labor with computer numerical control systems and eliminates the human error risk factor involved in the cutting processes. Workers can be transferred to more skill-intensive roles such as CNC design operations.

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