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Address: Hengjiao Industry Zone, Hengjiao Village, Shijie Town, Dongguan, Guangdong, China
Contact name:Hafrey
Dongguan Yexin Intelligent Technology Co., Ltd. |
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CNC machining, short for computer numerical control machining, represents a subtractive
manufacturing method that relies on the coordination of computerized controls and machine tools.
This process involves the removal of layers from a solid material block, with programming guiding
the desired cuts in the metal. The corresponding tools and machinery then execute the machining
task in an automated fashion.
Product Details
The primary focus of the CNC machining process revolves around metals, incorporating alloy steel,
carbon steel, cast iron, stainless steel, aluminum, copper, magnesium, and zinc.
Nevertheless, CNC machining extends its capabilities beyond metals to encompass plastic parts
and other materials, including ceramics, composites, thermoplastics, and thermosets.
| Common Materials | |
| Name | Description |
| Aluminum | High machinability and ductility, good strength-to-weight ratio. |
| Stainless steel | High tensile strength, corrosion and temperature resistant. |
| Mild steel | High machinability and weldability, high stiffness. |
| Brass | Low friction, excellent electrical conductivity, golden appearance. |
| Copper | Excellent thermal and electrical conductivity. |
| Titanium | Excellent strength to weight ratio, used in aerospace, automotive and medical industries. |
| POM | High stiffness, high accuracy, low friction, easy to machine. |
| ABS | Common thermoplastic, impact resistant, easy to machine. |
| Nylon | Excellent mechanical properties, thermal, chemical and abrasion resistant. |
CNC Machining Tolerances
Typical machining tolerances fall within the range of ± 0.005 inches or 0.13 millimeters.
Tolerances represent the allowable variation for a specific dimension.
For instance, if a CNC machining tool has a tolerance of ± 0.01 millimeters, it means that the tool
can deviate by 0.01 millimeters in each cut.
When provided with a drawing, Our CNC machining service can achieve CNC parts with tolerances
as tight as ± 0.0002 inches.
In the absence of a drawing, all CNC parts are manufactured according to our ISO 2768 medium
standard. We can also work to even tighter tolerances, such as ± 0.025 millimeters or ± 0.001
inches, when an engineering drawing specifies critical features.
| CNC Turning Tolerances | ||
| Limits for nominal size | Plastics | Metals |
| 0.5mm* to 3mm | ±0.1mm | ±0.05mm |
| Over 3mm to 6mm | ±0.1mm | ±0.05mm |
| Over 6mm to 30mm | ±0.2mm | ±0.10mm |
| Over 30mm to 120mm | ±0.3mm | ±0.15mm |
| Over 120mm to 400mm | ±0.5mm | ±0.20mm |
| Over 400mm to 1000mm | ±0.8mm | ±0.30mm |
| Over 1000mm to 2000mm | ±1.2mm | ±0.50mm |
| Over 2000mm to 4000mm | ±2.0mm | |
| *Please clearly indicate tolerances for nominal sizes below 0.5mm on your technical drawing. | ||
Applications of CNC Turning
The applications of CNC machining are expansive, offering solutions across diverse industries.
In the realm of woodworking, CNC machines revolutionize the production of wooden furniture,
providing efficiency in both time and cost.
Intricate designs that once required master craftsmanship can now be achieved with ease.
For lettering and engraving systems, CNC technology becomes a tool for marking patterns or text
onto surfaces, catering to artistic and serialized needs.
The electrical industry benefits from CNC machining for tasks such as creating precise component
mounting holes in printed circuit boards and manufacturing heat sinks for electronics.
CNC machines also play a crucial role in the pharmaceutical industry, producing precise equipment
like metering pumps, ingredient-dispensing nozzles, and packaging components.
In the fast-paced consumer goods industry, CNC machining contributes to the creation of custom
material-handling machinery for the food and beverage sector, as well as molds for injection-molded
plastic used in food packaging.
Company Profile
FAQ's
1. Can you ensure my designed component dimensions and tolerances are suitable
for production?
Our team of seasoned professionals is dedicated to offering "Design for Engineering" (DFM)
support, ensuring the feasibility of your designed component dimensions and tolerances for
production.
Recognizing the importance of swift responses during the idea testing phase, we prioritize
fast turnarounds on quotes. To gain a comprehensive understanding of the entire order
progression, you can refer to our production process page.
2. Do you offer reverse engineering services or suggest cost saving measures?
In addition to providing reverse engineering services, we excel in extracting design and
engineering details from diverse manufactured components. Our support extends to assisting
in the design process, recommending optimal raw materials, and advising on efficient machining
and finishing strategies.
Our approach considers the end-use of the part, enabling us to pinpoint subtle design
modifications, material alterations, or tolerance adjustments that can lead to cost savings
without sacrificing quality or performance.
3. What tolerances can achieve?
Tolerances are not universally defined and vary based on factors such as part size, design
geometry, the number and size of features, material selection, surface finish, and the
manufacturing process.
After order confirmation, we conduct a comprehensive Design for Manufacturing review to identify
areas for potential modification to enhance manufacturability. It is advantageous if you can specify
critical tolerance areas in your design, allowing for adjustments to optimize production time and
costs.
General tolerance guidelines are provided for CNC machining in metal and plastic, plastic injection
molding, CNC metals and plastic injection molding materials, metal 3D printing (+/- 0.5mm),
and an expected shrinkage rate of +/- 0.15% for vacuum casting.
Clear specifications in the 2D drawings are essential for precise adherence to manufacturing and
technical requirements.
