As Machined surface finish
As Machined applied by YiguProto

Surface finish

As Machined for CNC & Molded Parts

As machined is the raw surface left by the cutting tool. It is the fastest and cheapest finish for most prototypes.

  • Fastest turnaround and lowest cost.
  • No extra steps after machining.
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What it is

What Is As Machined?

As machined means we ship the part exactly as it leaves the CNC machine. The surface shows light tool marks. No sanding, blasting, or coating is added. It is the default finish for prototypes and for surfaces that are hidden or not critical to look at.

Typical roughness is about Ra 3.2 µm, but we can hit Ra 1.6 µm or better with sharp tools and fine passes.

How it works

How As Machined Works

Machine the part

CNC milling or turning cuts the shape to your drawing.

Deburr edges

We remove sharp burrs by hand or tumbling.

Inspect

We check dimensions against your file.

Ship

No extra finishing is applied.

Because there is no secondary process, lead time is the shortest of all finishes.

Why choose it

Benefits of As Machined

Fastest lead time

No extra process steps to wait for.

Lowest cost

You pay only for machining.

True to design

Surface reflects the real toolpath and tolerance.

Good for fit tests

Ideal for checking how parts assemble.

Functional

Fine for hidden or non-visible surfaces.

Typical specs

Typical As Machined Specifications

SpecificationTypical range / valueNotes
Surface roughnessRa 1.6 – 3.2 µm typical
Extra processNone
ColorBase material color
TolerancePer drawing (CNC standard)

Best applications

When to Use As Machined

Prototypes

Early design checks and fit tests.

Hidden surfaces

Inside faces that are never seen.

Jigs & fixtures

Functional tools where look is not key.

Internal parts

Components buried inside an assembly.

Materials

Compatible Materials for As Machined

We apply As Machined to the materials below. Not sure if your material qualifies? Our engineers will confirm it for free.

AluminiumStainless steelSteelBrassABSPCPOMPEEK

Our solution

Our As Machined Solution

As machined is our default and fastest option. We deburr every part and inspect it before shipping, so even raw parts are clean and accurate.

  • Sharp tools and fine passes for smoother Ra when needed.
  • Hand or tumble deburr on every part.
  • Full dimensional inspection report available.
  • Upgrade to a cosmetic finish later in production.
Request a Finish Review Talk to an Engineer
Not sure if raw is enough? Send your drawing and we will tell you when a cosmetic finish is worth the cost.

Design tips

Design & DFM Tips for As Machined

Use it for speed

Choose as machined when looks do not matter.

Avoid on wear faces

Tool marks can trap dirt on sliding surfaces.

Mind visible faces

Pick a finer finish for show surfaces.

FAQ

As Machined — Frequently Asked Questions

Send your drawings or 3D files. Most quotes come back within a few hours on business days, never more than 24 hours.
Yes. All customer files and ideas are treated as confidential. We sign NDAs when needed.
Yes. Our engineers review your design and suggest changes that cut cost, improve quality, or speed up delivery.
For As Machined, we support one-off prototypes and full production runs. There is no strict MOQ.
We can make samples for your approval. Cost depends on the process, and it is credited back on a production order.
About Ra 3.2 µm by default, down to Ra 1.6 µm with fine passes.
Yes, light tool marks are normal on as-machined surfaces.
Yes. We often leave hidden faces raw and finish only visible ones.
It is, for functional parts. Choose a cosmetic finish for consumer-facing looks.

Need As Machined on your parts?

Send your files and get a finish recommendation + factory-direct quote.

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