CNC machining has transformed the whole world of manufacturing with high end machines and some lines of code. But, still in several manufacturing shops, manual machining is preferred over CNC machining. Then the question arises – which one among CNC vs manual machining, is actually a better choice? In this blog, we will try to answer that very question by understanding both CNC and manual machining with their respective pros and cons. Let’s dive deeper into finding out what you should select between CNC machining vs manual machining.
Definition of Manual vs CNC Machining:
Here are definitions of both manual machining and CNC machining:
Manual Machining:
Manual machining is the process of cutting the workpiece with complete human control. All the tool movements are controlled manually with the help of levers, dials, and handwheels.
CNC Machining:
CNC machining is the process of cutting a workpiece into a desired shape using computer-generated lines of code. The whole tool movement is controlled by the programming language as entered by the machine operator.
Top Advantages of CNC Machining:
CNC machining offers numerous advantages for all machinists. Here are the main advantages that you need to know about:
Superior Precision:
One of the key advantages of using a CNC machine is the superior precision that it can bring. The high end CNC machines can provide micron level accuracy in machining, helping shops to make intricate parts easily.
Better Productivity:
The CNC machines are much faster than manual machines, and they can work 24*7 without the need for any human intervention. This helps the machining shops produce more products in a short period of time, and this is one of the major uses of CNC machine.
Repeatability:
If you want to get into a high volume production business, then CNC machines become hugely beneficial for you, as you can produce multiple parts at a continuous speed with maintained uniformity in part precision.
Better Safety:
One of the major CNC and manual machining differences is the advantage of safety in CNC machining. There is minimal human intervention in CNC machining, which makes it much safer for operators.
Reduced Material Waste:
In CNC machining, the toolpath is optimized as per the codes, which helps in smooth cutting of the workpiece to reach the accurate shape in one pass, which reduces the material waste due to less scrap.
Lower Labor Cost:
CNC machines do their jobs in an automated manner with minimal need for operator intervention, which helps the machining shops to reduce labor costs and optimize for more financial efficiency.
Complex Geometric Capabilities:
CNC machines can make complex geometric products with ease. The machine can make products with intricate designs, which are impossible with manual machining, and it is one of the major uses of CNC machine.
Drawbacks of CNC Machining:
Though it has many strengths, CNC machines have their own drawbacks too. Here’s the list of the major drawbacks of CNC machining:
Higher Initial Investment:
One of the major drawbacks of CNC machines is their high initial price. This becomes a setback for CNC machines in CNC vs manual machining because not every machining shop can afford a super costly machine.
Skilled Progammers:
To run a CNC machine, you need a skilled programmer who can write the right code that will instruct the movement of the tools of the CNC machine. This adds training time and costs for every machining shop.
Costly Maintenance and Repair:
CNC machines can be repaired only by well-trained technicians. So, when the machine stops working for some reason, you need to wait for the right technicians to reach and troubleshoot the issue, which increases the downtime of the machine.
Top Advantages of Manual Machining:
Manual machining is also trusted by several machining shops around the world. Here are some of the major advantages that make manual machining popular:
Lower Initial Cost:
The main advantage of manual machining in manual vs CNC machining is their lower initial costs. For small shops and hobbyists, manual CNC machines become a better choice as they can get into machining without a higher initial investment.
No Programming Needed:
If someone is not familiar with programming or coding, then they will also be able to do manual machining work due to the lack of programming needs. The machines are totally run by manual operating skills.
Quick Setup:
Manual machines don’t need extra time for setup and programming; you can start the machining job instantly, which helps with the quick production of a small batch of products and prototyping.
Easier Maintenance:
One of the major benefits of manual machining in manual vs CNC machining is that they are easy to maintain and troubleshoot. The repairs are straightforward and low cost, which makes it an accessible option for small machining shops, and you can buy affordable used manual machines from MachineStation.
Flexibility:
Manual machining’s one of the major advantages is its flexibility. Human intuition allows on-the-fly changes for unique or artistic work, like repairs or custom metalwork that CNC can’t easily adapt to.
Drawbacks of Manual Machining:
Like CNC machining, manual machining has its own drawbacks too, which you need to know to get a balanced view of CNC vs manual machining. Here are the main drawbacks of manual machining:
Prone to Human Error:
One of the main drawbacks of manual machining is that it’s prone to human error. More human intervention increases the risk of machining errors, leading to precision errors in products.
More Production Time:
Another drawback of manual machining is that the production time is higher. A manually operated machine is obviously not able to do machining at the speed of an automated CNC machine.
Not for Complex Designs:
Lastly, the manual machining process is not well suited for complex design works. If you need to machine parts with intricate designs, then multi axis CNC machines have an advantage in CNC and manual machining differences.
Key Differences Between CNC vs Manual Machining:
| Aspect | CNC Machining | Manual Machining |
| Precision | High | Moderate |
| Speed | Fast | Slow |
| Initial Cost | High | Low |
| Labour Needs | Low as automated | High |
| Complexity | Excellent | Limited to simpler designs |
| Waste | Low | High |
| Safety | High | Low due to direct contact |
| Best for | Mass Production, Complex works | Prototyping, Small batch works |
Which One Should You Choose – CNC Machining vs Manual Machining?
CNC machining is the best option if you:
- Need high precision and consistency.
- Produce medium to large batches.
- Work with complex geometries.
- Operates in demanding industries like aerospace, defense, and medical.
Manual machining is the best option if you:
- Have a limited initial budget.
- Run a small shop or are just starting.
- Want to do prototyping work.
- Prefers hands-on craftsmanship.
Conclusion:
CNC machining and manual machining are both good in their own ways. There are several CNC and manual machining differences that you should be aware of before you decide to select one for your machining shop. In case you’ve decided to go with CNC machining and want to get some affordable CNC machines, then check our collection of used CNC machines under $25K.
FAQs:
Q1: What are the advantages of CNC over manual machining?
Ans: The main advantages of CNC over manual machining are that it is faster, safer, reduces waste, and helps create more intricate designs.
Q2. Which type of production is best suited for CNC?
Ans: The type of production that is best suited for CNC machining is large scale production that needs high precision.
Q3. Is CNC machining difficult to learn?
Ans: CNC machining is definitely a bit challenging to learn, but one can definitely excel in it with dedication and the right guidance.
