Dongguan Yexin Intelligent Technology Co., Ltd.
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CNC Lathe Milling Parts Stainless Steel Order Custom CNC Parts CNC Machining
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Custom CNC milling offers manufacturers the ability to swiftly create CNC prototypes and robust
machined components for diverse applications. When choosing materials for CNC machining,
it's essential to note that only stainless steel provides corrosion resistance.
For lightweight products, consider low-density metals such as aluminum, beryllium, titanium,
and magnesium alloys.
CNC milling machines excel at producing highly accurate and precise prototypes quickly and
efficiently, making them an ideal choice for product development. By utilizing computer-aided
design (CAD) software to generate a 3D model of the prototype, CNC milling machines can then
fabricate a physical representation of that prototype.
This enables designers to create and evaluate a single prototype to refine and perfect their
design before proceeding to mass production.
Materials and alloys capable of withstanding high machining temperatures encompass titanium,
stainless steel, nickel, and tantalum. Lastly, it's crucial to consider material costs for custom
CNC milling projects, as these costs impact the overall project expenses.
Product Details
CNC machining materials are generally grouped into three primary categories: plastics, soft metals,
and hard metals. This classification includes materials such as aluminum, bronze, copper, ceramics,
plywood, steel, stone, wood, zinc, and various others.
Preference is often given to materials that are considered easy to work with and possess
advantageous properties compared to 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 |
| Nylon | Excellent mechanical properties, high toughness, poor moisture resistance |
| 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. | ||
Specialist industries
1. Fasteners:
Essential components like screws, bolts, and nuts, required for joining and securing parts in
assemblies across industries, can be produced with CNC turning.
2. Valves and Valve Components:
CNC turning allows for the creation of valve bodies, stems, seats, and intricate components
utilized in fluid control systems.
3. Tooling Components:
Inserts, toolholders, and bodies used in machining operations to enhance efficiency and accuracy
can be precision-made with CNC turning.
4. Automotive Parts:
CNC turning is employed in the production of various automotive parts, including engine
components, pulleys, brackets, and specialized parts.
The adaptability of CNC turning machines makes them invaluable for the manufacturing of a
diverse range of parts, contributing to the efficiency and precision of various industries.
Company Profile
FAQ's
1. Understanding CNC Machining Costs:
The cost of CNC machining is determined by factors such as complexity, quantity, and lead time.
To obtain an accurate cost estimate, we recommend submitting a 3D CAD model.
This allows us to provide an interactive quote and offer design for manufacturability (DFM)
feedback. Notably, our use of proprietary software and automated fixturing processes eliminates
upfront non-recurring engineering (NRE) costs.
This approach ensures that even for quantities as low as 1 to 200 parts, CNC machining remains
a cost-effective option. While prices may be comparable to or slightly higher than 3D printing,
CNC machining provides enhanced material properties and surface finishes, making it a valuable
choice.
2. CNC Machining Parameters: A Brief Overview
Machining parameters in CNC are primarily established by the machine operator during the
generation of G-code. Key parameters include the build size and accuracy of CNC machines,
distinguishing them notably from 3D printers.
CNC milling systems boast a substantial build area, with the capability to machine parts up to
2,000 x 800 x 100 mm (78” x 32” x 40”). Meanwhile, CNC turning sys
tems specialize in machining parts with a diameter of up to Ø 500 mm (Ø 20’’).
Precision and tight tolerances are hallmarks of CNC machining. Achieving accuracy levels
surpassing half the diameter of an average human hair (± 0.025 mm or .001’’) is well within
the capabilities of CNC machines. In the absence of specified tolerances in the technical drawing,
operators typically machine parts with an accuracy of 0.125 mm (.005’’).
3. Surface Texture in CNC Milled and Turned Parts
In the realm of CNC machining, the general surface texture of as-machined milled parts typically
exhibits a roughness of approximately 3.2μm (1.6μm for relatively new machines). On the other
hand, turned parts can achieve a finer surface with a roughness of 0.8μm. Notably, this level of
surface quality is attained without the need to adjust the machining speed.