5 Axis CNC Milling Parts CNC Custom Machining Part CNC Stainless Turning Parts
CNC Machining, short for Computer Numerical Control Machining, encompasses various types of
machines that employ computer-controlled tools to subtract material from a workpiece.
This computerized control distinguishes CNC machining as a method that surpasses conventional
machining in terms of speed, precision, and accuracy.
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Materials for CNC machining are typically classified into three major categories: plastics,
soft metals, and hard metals. Examples encompass aluminum, bronze, copper, ceramics,
plywood, steel, stone, wood, zinc, and various others.
Materials characterized by ease of manipulation and favorable properties are commonly
preferred over alternative options.
| Common Materials for CNC Machining |
| Material | Properties |
| Aluminum | 2024: Good fatigue resistance and strength; excellent toughness at moderate to high strength levels; improved fracture toughness |
| 6061: Excellent machinability, low cost, and versatility |
| 7075: High strength, hardness, low weight, and heat tolerance |
| Stainless Steel | Excellent machinability and outstanding uniformity; good workability and weldability, high ductility and formability |
| Steel Alloy | Mix of chromium, molybdenum, and manganese yields toughness, good torsional and fatigue strength |
| Brass | Versatile and highly attractive copper/zinc alloy with warm yellow color accommodates severe forming/drawing |
| Titanium | Excellent strength to weight ratio, used in aerospace, automotive, and medical industries |
| Copper | High ductility and high electrical and thermal conductivity; develops attractive blue-green surface patina over time |
| ABS | Excellent impact resistance, good mechanical properties, susceptible to solvents |
| PEEK | High-performance thermoplastic, very high strength, thermal and chemical resistant |
| POM | High stiffness, excellent thermal & electrical properties, relatively brittle |
CNC Machining Tolerances
Tolerances are not standardized across all processes and materials.
The final tolerances on your part depend on various factors, such as part size, design complexity,
the number and size of features, materials used, surface finish, and the manufacturing process
employed.
Once your order is confirmed, we conduct a Design for Manufacturing review to identify areas that
may need modification for better manufacturability.
It's helpful if you can specify which areas in your design have critical tolerances that must be met
and which can be adjusted, if necessary, to optimize production time and cost.
| CNC Milling 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. |
Common Applications of CNC Milling Parts
CNC machining, being a versatile subtractive manufacturing process, finds extensive application
across a multitude of industries.
Some of the key sectors that heavily rely on CNC machining include:
1. Aerospace: Precision is paramount in aerospace, and CNC machining is instrumental in crafting
intricate components for aircraft and spacecraft, ensuring optimal performance and safety.
2. Automotive: The automotive industry utilizes CNC machining for the production of precise and
complex parts, ranging from engine components to intricate systems, contributing to the efficiency
and reliability of vehicles.
3. Aviation: Similar to aerospace, the aviation industry benefits significantly from CNC machining,
ensuring the manufacturing of high-precision components for aircraft to meet stringent safety and
performance standards.
4. Transportation: Beyond aerospace and automotive, the broader transportation sector, including
rail and maritime industries, relies on CNC machining for the fabrication of critical components that
withstand rigorous operational demands.
These industries highlight just a few examples of CNC machining's widespread utilization.
The technology's ability to deliver accuracy, consistency, and intricate detailing makes it
indispensable in various integral sectors, ensuring the production of high-quality components that
meet the stringent standards of modern manufacturing.
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FAQ's
1. How long does delivery time and quotation take?
The lead time for parts is contingent on their complexity. Parts with low complexity typically boast
a lead time of 2-3 days, while moderate complexity extends the lead time to 2-5 days.
High-complexity parts may require a lead time ranging from 5 to 15 days. Quoting time is
influenced by design complexity, with a range of 1 business day (or faster) for simpler designs to
3+ business days for more intricate ones.
If you have a design awaiting assessment and quoting, feel free to get in touch with our team.
2. What are standard machining tolerances?
Standard machining tolerances stand at ± 0.005" or 0.13mm, indicating the acceptable range for
dimensions. If a CNC machining tool is specified with a tolerance of ± 0.01 mm, it implies a
permissible deviation of 0.01 mm in each machining operation.
When provided with a drawing, our CNC machining service can achieve part tolerances as fine
as ± 0.0002 in. In the absence of a drawing, all CNC parts align with our ISO 2768 medium
standard. Projects demanding tighter tolerances, such as ±0.025mm or ±0.001", can be
accommodated with an engineering drawing outlining critical features.
3. How does you ensure the quality of my parts?
Upon confirmation of your order, a detailed Design for Manufacturing (DFM) review is carried out to
identify any potential issues affecting part quality. All incoming materials are meticulously inspected
and verified using a suite of testing equipment.
Final inspection reports are generated as part of our pre-shipment quality check.
Furthermore, we offer the option to share inspection data in real-time, enabling collaborative efforts
to address any quality concerns that may emerge during production.
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