Low-volume CNC machining is an industrial manufacturing behavior that produces a few pieces of products or parts ranging from a few to several hundred pieces using CNC machining technology. It takes 25%-30% of the total output value of the machining industry. There is a rising trend of businesses turning to cheap low volume CNC machining rather than mass production.
What is low-volume CNC machining?
Actually, there is no specific definition for low-volume CNC machining. Apart from producing prototypes, CNC machining is also widely applied in low-volume production. CNC (Computer Numerical Control) machining is a technique that performs precise and repetitive operations on the raw material, such as cutting, drilling, and milling, to create the desired shape and size of the finished part. Small-batch CNC-machined parts can be prototypes, replacement parts, or specialized components. It is often more cost-effective than traditional manufacturing methods for these quantities.
Advantages of low-volume CNC machining
1. Cost reduction
Because of fierce competition and a changeable economic environment, it is getting harder and harder for companies to obtain big orders. Small-batch orders cannot bring enough martins because of high mold costs. In this case, cheaper CNC machining is an excellent solution, which reduces time, mold, and material costs.
2. Fast entry to new markets
By using CNC machining, companies can launch new products in new markets faster. Because its lead time is shorter than that of traditional manufacturing methods.
3. Customized and flexible
Every part can be customized based on 3D files provided by the customer. There is a wide selection of materials and surface treatments. With 3-axis, 4-axis, and 5-axis CNC machines, even very complicated geometries can be machined. Cheap low volume CNC machining enables companies to stay competitive by creating custom products quickly and improving rapidly according to the feedback for end customers.
Costs of low-volume CNC machining
The major factors that determine the cost of low-volume CNC machining include material, machining complexity, quantity, tolerance, surface treatment, and lead time.
1. Raw material
CNC machining can process raw materials in block or plate form. Some parts may require special materials like bakelite which is more expensive than other common plastics.
2. Complexity of machining
The more complex the part is the higher the cost is. Complicated components may need more machining steps. longer time and more tools, which all can add up the costs.
3. Quantity
Although the quantities for low-volume CNC machining are not high compared with mass production, the costs also vary for different quantities. Setting up the machines for a larger quantity of parts for a single time can be cheaper than doing it for less volume.
4. Tolerance
Higher tolerances require more precise processing, which would increase the costs.
5. Setting-up time and tooling costs
Setting up the CNC machines and toolpath for specific machines may be very time-consuming and expertise is required. For some special structures, customized toolings are needed, which will increase the costs.
6. Surface treatment
After machining, some components need post-treatment, such as polishing, anodizing, and painting, for aesthetic or protection purposes. In this case, the costs are relatively higher.
7. Lead time
It is common sense that the more urgent the order is the higher the price is. Low-volume CNC machining is no different. As CNC machining is fast, the tight lead time can be met.
How can you keep the costs of low-volume CNC machining down?
Based on the above factors, you can control one or more factors based on your needs.
1. Material selection
If there are no special requirements for the material properties, the most economical choice of plastic is ABS, and metal is aluminum.
2. Simplifying part design
A simpler design requires simpler processes and is more feasible for manufacturing. While complex part design sometimes may have interference issues and also take longer time and labor force.
3. Making use of standard tooling
Using standard toolings rather than custom ones can help reduce costs as well. Off-the-shelf tooling is affordable and efficient. You can turn to your vendor for suggestions to adjust your design accordingly.
4. Choosing the right supplier
The right CNC machining supplier can help to ensure that your low-volume CNC machining project is cheap and meet your budget. An experienced vendor with the appropriate equipment can assist in streamlining the machining process and bringing down costs overall.
With over a decade’s experience in the industry, X Rapid Technologies can offer relatively cheap CNC machining services. Kindly contact us if you are interested in cheap low volume CNC machining for your new projects.
