Dongguan Yexin Intelligent Technology Co., Ltd.
Precision in Every Part, Excellence in Every Detail
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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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The primary materials employed in the CNC machining process are predominantly metals.
These metals encompass alloy steel, carbon steel, cast iron, stainless steel, aluminum, copper,
magnesium, and zinc.
However, CNC machining is not limited to metals alone; it is also capable of machining plastic
parts and working with various materials, including ceramics, composites, thermoplastics,
and thermosets.
| Common Materials | |
| Name | Description |
| Aluminum | High machinability and ductility, good strength-to-weight ratio. |
| Stainless steel | High tensile strength, corrosion and temperature resistant. |
| Mild steel | High machinability and weldability, high stiffness. |
| Brass | Low friction, excellent electrical conductivity, golden appearance. |
| Copper | Excellent thermal and electrical conductivity. |
| Titanium | Excellent strength to weight ratio, used in aerospace, automotive and medical industries. |
| ABS | Common thermoplastic, impact resistant, easy to machine. |
| Nylon | Excellent mechanical properties, thermal, chemical and abrasion resistant. |
| POM | High stiffness, high accuracy, low friction, easy to machine. |
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 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 |
Specialist Industries
CNC turning machines showcase their versatility by crafting an array of parts with varying
intricacies. Among the parts manufactured are shafts and axles, ideal for industries like automotive
and aerospace.
Additionally, CNC turning is adept at producing precision bushings and bearings crucial for reducing
friction in mechanical assemblies. The scope extends to connectors, fittings, fasteners such as
screws and nuts, as well as valves and valve components.
Furthermore, CNC turning plays a pivotal role in creating tooling components like inserts, toolholders,
and bodies, contributing to enhanced efficiency and accuracy in machining operations.
In the automotive sector, CNC turning is harnessed for crafting engine components, pulleys, brackets,
and specialized parts.
Company Profile
FAQ's
1. How much does CNC machining cost?
The cost of CNC machining is determined by factors such as complexity, quantity, and lead time.
To obtain a precise cost estimate, we encourage you to submit a 3D CAD model, enabling us to
provide an interactive quote accompanied by design for manufacturability (DFM) feedback.
Our use of proprietary software and automated fixturing processes eliminates upfront
non-recurring engineering (NRE) costs, making CNC machining a cost-effective choice for
quantities as low as 1 to 200 parts. While prices may be comparable or slightly higher than
3D printing, CNC machining delivers superior material properties and surface finishes.
2. What's the general surface texture of CNC milled and turned parts?
In the realm of CNC machining, milled parts typically display a surface roughness of approximately
3.2μm (or 1.6μm for newer machines). In contrast, turned parts exhibit a finer surface texture with
a roughness of 0.8μm. Importantly, this finer surface finish in turning is achieved without the need
for adjusting machining speeds.
3. What are your tolerances for machined parts?
Our machined parts adhere to precision standards, featuring +.005”/- .005” local tolerances across
most metal geometries and +/- 0.010" for plastics. It's worth noting that tolerances may vary for
larger parts, especially with considerations for flatness post heat treatment.
An "As Milled" finish for CNC parts requires a minimum surface finish of 125. Fabricated parts maintain
a 0.010” dimensional tolerance and a 1° angular tolerance. Tapped holes not explicitly labeled as
features in the CAD model may be machined based on the specified diameters.
Crucially, surface treatments such as anodizing, bead blasting, iriditing, powder coating, etc., will
only be applied upon explicit payment and acknowledgment.