When CNC Machining Is Not the Best Solution
When developing a new component, many engineers naturally default to CNC machining.
And for good reason.
CNC machining is one of the most flexible and precise manufacturing technologies available today. It allows complex components to be produced with excellent accuracy, making it ideal for prototypes, development projects and low-to-medium production volumes.
But CNC machining is not always the most economical or technically appropriate solution.
In fact, selecting the wrong manufacturing process early in a product’s lifecycle can significantly increase costs without improving performance.
Choosing the right manufacturing method starts before the first component is produced.
Start With the Requirement, Not the Process
A common mistake in component development is deciding how a part should be manufactured before fully understanding what the part actually needs to achieve.
The most suitable manufacturing process depends on several factors:
- Annual production volume
- Required tolerances
- Material selection
- Component geometry
- Surface finish requirements
- Assembly requirements
- Future design changes
A manufacturing method that makes perfect sense for producing 500 pieces may be completely unsuitable when annual demand increases to 500,000.
The question should not be:
“How do we machine this part?”
The better question is:
“What is the most efficient way to manufacture this component?”
The Swiss Turning Example: Precision Before CNC
Texpart Technics has its roots in the Swiss watchmaking industry, where miniature precision components have been manufactured for generations.
Long before modern CNC machines became the standard, the watch industry relied on highly specialised turning processes to manufacture millions of extremely accurate small components.
Many of these principles are still relevant today.
While CNC technology dominates many applications, conventional cam-controlled turning machines continue to provide significant advantages for certain high-volume precision parts.
For relatively simple rotational components produced in large quantities, these machines can offer:
- Extremely short cycle times
- Excellent repeatability
- Stable production processes
- Highly competitive unit costs
The newest technology is not always the best technology.
The best technology is the one that matches the requirement.
When Other Manufacturing Processes Make More Sense
CNC machining is only one tool in the manufacturing toolbox.
Depending on the application, alternative processes can provide significant advantages.
Stamping
For very high-volume metal components, stamping can often provide a much more economical solution.
After the initial tooling investment, stamping allows extremely efficient production with very low unit costs.
Typical applications include:
- Electrical contacts
- Springs and clips
- Thin metal components
- High-volume repeat parts
Injection Moulding
For plastic components, machining is often useful during development but rarely the best choice for large-scale production.
Injection moulding allows:
- Complex shapes
- Integrated design features
- Consistent quality
- Very competitive pricing at higher volumes
A component that is expensive and slow to machine may become simple and cost-effective when designed correctly for moulding.
Laser Cutting and Forming
For sheet metal applications, laser cutting combined with forming operations can often reduce cost and complexity.
Instead of removing large amounts of material through machining, the component can be created more efficiently from sheet material.
This can reduce:
- Production time
- Material waste
- Overall manufacturing cost
Additive Manufacturing
Additive manufacturing has created new possibilities, particularly during product development.
It is especially valuable for:
- Prototypes
- Design verification
- Rapid iterations
- Complex geometries difficult to produce conventionally
However, like every process, it needs to be applied where it makes technical and commercial sense.
The Best Solution Is Often a Combination
Modern products rarely rely on one manufacturing technology.
A finished assembly may include:
- CNC-machined components
- Swiss turned parts
- Stamped contacts
- Injection moulded housings
- Springs and formed components
- Special surface treatments
The challenge is not simply manufacturing each individual part.
The real challenge is selecting the correct process for each component from the beginning.
Small decisions made during development can have a major impact on long-term production costs.
Looking Beyond the Drawing
At Texpart Technics, we regularly work with customers who already have a drawing and a manufacturing method in mind.
Often, that method is exactly right.
Sometimes, however, a small design adjustment or an alternative production process can achieve the same result at a significantly lower cost.
By combining experience in CNC machining, traditional Swiss turning technologies, assembly processes and an international supplier network, we help customers identify the most suitable manufacturing approach for their application.
Good manufacturing is not about choosing CNC, stamping or moulding.
It is about choosing the right process for the job.
Need the right manufacturing solution for your component?
Every project has different requirements. Let us review your application and help identify the most suitable production method — balancing precision, performance and cost efficiency.
Contact us to discuss your next project.
