CNC Milled Turned Parts Spare Stainless Steel Custom Parts 5-Axi CNC Machining
Service
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
CNC machining encompasses a wide variety of materials, each requiring specific machining
parameters for optimal performance. The most common materials include:
1. Metal:
Metal is the predominant material in CNC machining, with the ability to cut various types, from
brass to nickel superalloys like Inconel. Applications range from injection molds to shafts and gears.
2. Plastic:
While injection molding is common for plastic parts, CNC machining is used for specific components
like ABS, nylon, and polycarbonate. Applications include valve bodies, bushings, and injection
molding prototypes.
3. Wood:
CNC routers are frequently employed for wood cutting, especially for decorative purposes like
furniture, window frames, and ornamental panels.
4. Foam:
Polyurethane foam, both closed and open-cell, finds application in CNC machining for creating
secure packaging, such as foam used in toolboxes for tool transportation.
5. Composites:
CNC machines are essential for processing abrasive composite materials like aramid, fiberglass,
and carbon fiber, commonly used in aerospace and marine components.
| 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 |
Post-processing and surface finishes for CNC machining
CNC-machined parts as they emerge from the machine often exhibit visible tool marks, a feature
that may not align with your specific part requirements.
Fortunately, there exists a multitude of post-processing techniques aimed at enhancing the surface
appearance and elevating attributes such as wear resistance, corrosion resistance, and chemical
resistance.
Methods like anodizing, bead blasting, and powder coating present viable options for refining the
final presentation of your custom parts, allowing you to achieve the desired surface quality and
performance characteristics.
| Surface Finishing Options for CNC Machining |
| Name | Applicable Materials | Can be Applied with |
| Alodine | Aluminum | Media Blasting, Tumbling, Type II Anodizing* Type III Anodizing*, Type III Anodizing with PTFE* |
| Anodizing | Aluminum | Media Blasting, Tumbling, Alodine* |
| Black Oxide | Steel, Stainless Steel | Media Blasting, Tumbling, Passivation |
| Electroless Nickel Plating | Aluminum, Steel, Stainless Steel | Media Blasting, Tumbling |
| Electropolishing | Steel, Stainless Steel | — |
| Hand Polishing | Acrylic | Enhanced cosmetic appearance |
| Media Blasting | Aluminum, Steel, Stainless Steel, Brass, Bronze, Copper | All post processes except Electropolish and Powdercoat |
| Nickel Plating | Aluminum, Steel, Stainless Steel | Media Blasting, Tumbling |
| Passivation | Steel, Stainless Steel | Black Oxide, Electroless Nickel Plating, Zinc Plating, Tumbling, Media Blasting |
| Powder Coating | Aluminum, Steel, Stainless Steel | — |
| Tumbling | Aluminum, Steel, Stainless Steel, Brass, Bronze, Copper | All post processes except Electropolish and Powdercoat |
| Vapor Polishing | CNC Polycarbonate (Clear, Black) | Enhanced cosmetic appearance, near optically clear applications |
| Zinc Plating | Steel, Stainless Steel | Media Blasting, Tumbling, Passivation |
Applications of CNC Machining
CNC machining finds widespread application across diverse industries, playing a crucial role in
aerospace, automotive, consumer electronics, robotics, and agriculture, especially in the fabrication
of metal components.
Moreover, it is extensively employed in the production of medical devices, household goods, and
various consumer applications. The influence of CNC machining is also evident in sectors like energy
and oil and gas, solidifying its status as one of the most prevalent and indispensable manufacturing
processes worldwide.
Company Profile
FAQ's
1. What are standard machining tolerances?
The standard machining tolerance is ± 0.005" or 0.13mm, representing the allowable range for
a dimension.
For instance, if a CNC machining tool has a tolerance of ± 0.01 mm, it implies a permissible
deviation of 0.01 mm in each cut. With a provided drawing, our CNC machining service can achieve
part tolerances as low as ± 0.0002 in.
In the absence of a drawing, all CNC parts adhere to our ISO 2768 medium standard.
For projects demanding tighter tolerances, ±0.025mm or ±0.001", we can accommodate with an
engineering drawing specifying critical features.
2. Quality Assurance
The trust our customers place in us is paramount. We adhere to proven quality management
principles to not only meet customer satisfaction but also to continually elevate our performance
and capabilities.
Our extensive experience spans decades, during which we have consistently met rigorous regulations
and remained PPAP compliant in industries like automotive, aerospace, and medical devices.
These industries set benchmarks for the quality assurance we uphold across all our manufactured
products.
3. What if I am not completely satisfied with the parts I receive?
Our commitment extends to guaranteeing the quality of our materials and workmanship in accordance
with the terms specified in the initial order and the information supplied by you.
Any disputes arising from subjective assessments will be addressed by our management, which will
make every effort in good faith to ensure your complete satisfaction.
The foundation of our ongoing business is built on earning your confidence in our capacity to meet and
surpass reasonable expectations.
4. Can passivate my parts?
Passivation is a treatment that alters the surface chemistry of certain types of metals. We provide
passivation services for corrosion protection, enhanced durability, improved aesthetics, and more.
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