Dongguan Yexin Intelligent Technology Co., Ltd.
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CNC Custom Parts CNC Machining Stainless Steel Milled Parts CNC Machining Parts
CNC (Computer Numerical Control) machining involves the utilization of a machine that
autonomously removes material from a raw stock according to a predetermined set of
computer-generated commands.
This process can be applied to a wide range of materials, spanning from expanded polyurethane
foam to nickel superalloys.
CNC machining finds various applications, such as the production of fabricated items, ornamental
furniture, and manufacturing turbine blades.
The cost of CNC machining is influenced by factors like the level of precision required, surface
finish specifications, quantity of parts, choice of material, and overall complexity of the component.
Product Details
CNC machining encompasses a wide range of materials, primarily categorized into three
major groups: plastics, soft metals, and hard metals.
These materials include aluminum, bronze, copper, ceramics, plywood, steel, stone, wood, zinc,
and numerous others.
The choice of material depends on ease of workability and desired properties, with those offering
favorable characteristics often being preferred in CNC milling applications.
| Common Metal Materials for CNC Machining | |
| Metal 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 |
| Copper | High ductility and high electrical and thermal conductivity; develops attractive blue-green surface patina over time |
| Titanium | Excellent strength to weight ratio, used in aerospace, automotive, and medical industries |
| Steel Mild Low Carbon | High machinability and weldability, high stiffness; good mechanical properties, machinability, and weldability at low cost |
| Surface Finishes | ||
| Name | Applicable to | Machining marks |
| As machined | Metals, Plastics | Visible, light surface scratches |
| Smooth machining | ||
| Fine machining | Metals | Slightly visible |
| Polishing | Metals | Removed on primary surfaces |
| Bead blasting | Metals | Removed for non-cosmetic, removed on primary surfaces for cosmetic |
| Brushing | Metals | |
| Anodizing Type II | Aluminum | |
| Anodizing Type III | Aluminum | Visible under anodizing |
| Black oxide | Copper, Stainless steel, Alloy steel, Tool steel, Mild steel | Visible |
| Powder coating | Metals | Removed |
| Brushed + electropolishing | Stainless steel | Removed on Primary surfaces |
CNC Machining Applications
CNC machinery finds extensive applications across various industries, leading to enhanced
efficiency and mass production of custom CNC parts. The key sectors benefiting from
CNC machining include:
1. Aerospace: The aerospace industry relies on CNC technology for precision manufacturing
of aircraft components, ensuring safety and performance.
2. Automotive: CNC machining plays a crucial role in producing intricate automotive parts,
contributing to vehicle safety, reliability, and innovation.
3. Medical: The medical machine manufacturing sector utilizes CNC machinery to craft precise
and complex medical devices and equipment, contributing to advancements in healthcare.
4. Transportation: CNC technology supports the transportation industry, including the
manufacturing of vehicles, ensuring quality and durability.
5. Defense: The defense sector benefits from CNC machining for the production of critical
defense components and equipment, ensuring national security.
6. Marine: CNC machinery is used in the marine industry to create specialized marine equipment
and parts, improving marine technology.
7. Oil and Gas: CNC machining aids the oil and gas industries by fabricating essential components,
enhancing exploration and extraction processes.
8. Electronics: The electronics industry relies on CNC technology for the precision manufacturing
of electronic components and devices, driving technological advancements.
Company Profile
FAQ's
1. What's the general surface texture of CNC milled and turned parts?
Typically, as-machined milled parts exhibit a surface roughness of approximately 3.2μm
(with the potential to reach 1.6μm for newer machines).
In contrast, for turned parts, achieving a surface roughness as low as 0.8μm is possible,
ensuring that machining speed adjustments are not always necessary.
2. What are your tolerances for machined parts?
For most metal geometries, our tolerances are within +0.005" / -0.005".
For plastics, it's typically +/- 0.010". Tolerances may vary for large parts, especially those
requiring flatness after heat treatment.
"As Milled" finish requires a minimum 125 surface finish for CNC parts.
All fabricated parts adhere to a 0.010" dimensional and 1° angular tolerance.
Tapped holes not explicitly noted in the CAD model will match the specified diameters
in that model.
Surface treatments like anodization, bead blasting, iridite, powder coating, etc.,
are only applied if paid for and acknowledged in advance.
3. How Much Does CNC Machining Cost?
The cost of CNC machining a part is influenced by various factors, including:
1. Material: The choice of material affects cost, with materials like Inconel being more expensive
due to increased tool wear and slower machining.
2. Complexity: Complex features drive up costs, as machining intricate surface shapes is more
time-consuming.
3. Tolerances: Tight dimensional tolerances increase expenses; specifying them unnecessarily
on non-critical features can inflate costs.
4. Surface Finish: Achieving mirror finishes demands specialized tools and strategies, prolonging
machining time and costs.
5. Quantity: Low-volume production costs more per part due to initial setup and programming
costs spread over fewer pieces.