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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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OEM ODM CNC Aluminum Parts Lathe Machining Service Machine Aluminum
Mechanical CNC Milled Parts
CNC milling involves the use of automated cutting machines equipped with a rotating
spindle-head to remove unwanted material.
These machines come in various sizes and configurations, allowing for versatile applications.
While CNC milling is commonly employed for cutting tougher metals, it can also handle materials
ranging from plastics and aluminum to stainless steel and titanium.
Product Details
CNC Milling is a widely adopted manufacturing method renowned for its precision and accuracy.
It involves the use of a 3D CAD design, tooling, and machining equipment like heavy-duty drill
presses and CNC machines to produce custom 3D CAD models.
This process can produce CNC parts from materials such as plastic, metal, and others,
achieving tight tolerances and impeccable surface finishes.
CNC milling serves both prototyping and production needs, accommodating intricate designs
and delivering high-precision CNC parts that meet precise specifications and tolerances in a short
timeframe.
Additionally, it can produce parts with specified surface finishes, ensuring uniformity that aligns
with exact requirements and tolerances.
| 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 | |
| Brass | Versatile and highly attractive copper/zinc alloy with warm yellow color accommodates severe forming/drawing |
| Copper | High ductility and high electrical and thermal conductivity; develops attractive blue-green surface patina over time |
| 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 |
| Steel Mild Low Carbon | High machinability and weldability, high stiffness; good mechanical properties, machinability, and weldability at low cost |
| Titanium | Excellent strength to weight ratio, used in aerospace, automotive, and medical industries |
| 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 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. | ||
Application for CNC Milling Parts
CNC Milling parts are widely used in a slew of industries, including aerospace, defense, robotics,
oil & gas, medical technology, research and more.
Company Profile
FAQ's
1. What is your typical lead time? Can my parts be produced urgently?
Our standard lead time for screw machine products, from quoting to
manufacturing and shipping,
is approximately one week, with an on-time delivery rate of over 99%.
Depending on factors like tooling, gauges, and material availability, we might accommodate
expedited production for your parts. Feel free to inquire!
2. What are your tolerances for machined parts?
Our tolerances for machined parts are typically within
+0.005"/-0.005" for most metal geometries,
and within +/- 0.010" for plastics. However, tolerances may vary for larger parts, especially
when maintaining flatness over extensive sections post-heat treatment.
Regarding the finish requirements, an "As Milled" finish should have a minimum of 125 surface
finish for CNC parts.
For all fabricated parts, there is a dimensional tolerance of 0.010" and an angular tolerance of 1°.
Please note that tapped holes not explicitly indicated as features in the provided CAD model may
be machined to the specified diameters in that model.
Additionally, surface treatments like anodizing, bead blasting, iriditing, powder coating, etc.,
will only be applied if they have been paid for and explicitly acknowledged in advance.
3. How do you design parts for CNC milling?
Creating parts for CNC milling involves careful design considerations. Our team of mechanical
engineers recommends the following essential guidelines:
1. Minimize Set-ups: Reducing the number of setups required for a part streamlines the milling
process, enhancing efficiency.
2. Internal Corner Radii: Include internal corner radii in your designs, preferably at least 1/4 the
depth of the cut, or ideally around 1/2 the depth (if feasible) for cost-effectiveness.
Whenever possible, opt for drilling holes instead of milling shapes to save time and resources.
3. Avoid Thin Walls: Thin sections of a part can warp and deflect due to machining forces, even
with soft metals. If a section doesn't need to be thin, avoid making it so to improve production
speed, reduce costs, and enhance surface finish.
4. Consider Part Size: Smaller features require smaller, more delicate tools that run slower and
increase costs. If a feature doesn't need to be small for functionality, make it larger.
5. Standardize Everything: Utilize standard thread sizes, corner radii, materials, and tolerances
to save money and ensure timely part production, regardless of the manufacturer.
