What is an As Machined surface finish?

An As Machined surface finish refers to a part’s surface directly after CNC machining, without further processing like polishing or coating. It maintains visible tool marks with Ra values typically between 1.6μm and 3.2μm.

Why choose As Machined finish for my parts?

It’s the most cost-effective finish that preserves precision and tight tolerances while eliminating the need for additional post-processing steps.

Which materials are compatible with As Machined surface finishes?

This finish works for most CNC materials including aluminum, stainless steel, brass, copper, titanium, and various plastics.

Can Lewei Precision control surface roughness levels?

Yes. Surface roughness can be adjusted through cutting parameters and tooling, achieving Ra values as low as 0.8μm when required.

Does Lewei Precision provide post-processing for machined parts?

Yes, additional surface finishes such as anodizing, polishing, bead blasting, and coating can be applied upon request.

Lewei Precision As Machined Services

Our quality-focused As Machined services produce parts with surface finish having a surface roughness of Ra 3.2μm and Ra 1.6μm without additional finishing.

As Machined Overview

Parts with as-machined surface finish are characterized by visible tool markings with a surface roughness depending on the machine tool, cutting parameters, tool paths, and the operator’s expertise.

This surface finish is what you get after freshly machining a part without subjecting it to additional processing like honing, grinding, and other surface finishing treatments.

As machined services deliver a machined surface finish, the most convenient option for parts needing tight tolerance and reduced manufacturing cost.

Surface Roughness

Applicable Materials

Cosmetic Availability

Visual Appearance

Ra 1.6μm

Cleaning, deburring, and breaking sharp edges only after machining presents a surface without further refinement.

Ra 1.6μm

Cleaning, deburring, and breaking sharp edges only after machining presents a surface without further refinement.

Advantages of As Machined Surface Finish

Faster production time because it does not require extra finishing steps
It preserves the workpiece’s integrity and retains its natural look
Extensive machining material supports
Suitability for parts with strict dimensional tolerances.
Cost-effectiveness because the surface finish does not require additional processing

Notes

As Machined Design Considerations

Simplify the Part Geometry: Avoid complex part design and reduce tight tolerance when feasible to facilitate a smoother machining operation and reduce surface imperfections.
Optimize Tooling and Toolpaths: Use sharp and high-quality tools and carefully planned tool paths to minimize vibrations and enhance cutting efficiency, which can affect the surface finish.
Select Machinable Materials: Use CNC machining materials with excellent machinability and favorable surface finish properties.