Conventional precision
±0.005–0.01 mm; Ra 0.4–1.6 μm; CPK ≥ 1.33
CNC機械加工
Precision Machining Services
Micron-level CNC cutting, forming, and finishing for aerospace, medical, and automotive electronics requirements.
Precision Machining Services use high-precision CNC machine tools and related equipment to cut, form, and finish metals, plastics, and other materials at micrometer-level accuracy — meeting stringent requirements for dimensional accuracy, surface quality, and material performance in aerospace, medical devices, automotive electronics, and similar industries.
What is precision machining?
Precision machining is CNC work with a tighter inspection plan: finer stock, better thermal control, and reports that match aerospace, medical, or electronics drawings. The machines may look like ordinary mills and lathes; the difference is how much of the drawing is treated as critical.
AIHFABS uses this page when CPK, Ra, or micron-level fits are the reason you are not on a standard prototype mill. Over-tolerancing a whole part still costs money — mark only the features that function.
Precision machining capabilities
Two grades are listed so you can match the drawing instead of defaulting to the tightest band.
Ultra-high precision
±0.001–0.002 mm; Ra ≤ 0.05 μm; CPK ≥ 1.67
Process control
SPC, CMM, CPK monitoring
Quality systems
ISO 9001 / IATF 16949 / ISO 13485 aligned partners
Lead time
From 3–8 business days (complexity dependent)
Precision materials
Titanium, stainless, hard steels, nickel alloys, and stable engineering plastics.
Aluminum 6061
CNC mill / turn plate and bar
Aluminum 7075
High-strength aerospace aluminum
Stainless Steel 304
General-purpose stainless stock
Stainless Steel 316
Marine-grade stainless
Carbon Steel 1018 / 1045
Traditional mild and medium carbon steel
Brass C360
Free-machining brass
Copper C110
High-conductivity copper
Titanium Grade 5 (Ti-6Al-4V)
CNC mill titanium billet
Clear Acrylic (PMMA)
Transparent CNC sheet and block
Colored / Frosted Acrylic
Opaque, tinted, and matte PMMA sheet
POM (Delrin / Acetal)
Engineering plastic for CNC
Polycarbonate (PC)
Impact-resistant engineering sheet
Precision surface finishes
Texture is specified separately from size. Mirror faces are a process, not a free upgrade.
Controlled as-machined
Ra 0.4–1.6 μm on conventional precision work, with CPK tracked when the program requires it.
Ultra-fine / grind
Grind or extra finish passes toward Ra ≤ 0.05 μm on seats and optical-adjacent hardware.
Passivate or coat
Passivation, anodize, or specified plating after the dimensional report is accepted.
How precision machining compares on AIHFABS
Use this route when inspection grade drives the quote. Everyday brackets can stay on standard milling or turning.
| プロセス | 納期 | 公差 | 料金 |
|---|---|---|---|
| CNC Machining ServicesMetals & plastics | From 1–5 business days depending on complexity and finish | ±0.05 mm standard; tighter on request with drawing callouts | Instant quote · typical prototype from $45 |
| CNC Milling ServicesMetals & plastics | Simple 1–3 days; complex 3–7 days; batch 5–15 days | ±0.01 mm standard; ±0.005 mm high precision | Instant quote · typical prototype from $40 |
| CNC Turning ServicesMetals & plastics | Simple 1–3 days; complex 7–10 days | ±0.01 mm standard; ±0.001–0.002 mm high precision | Instant quote · typical prototype from $35 |
| CNC Routing ServicesPlastics & composites | From 2–4 business days | Medium precision (~±0.025 mm class) | Instant quote · typical panel job from $30 |
| 5-Axis CNC MachiningMetals & plastics | From 3–7 business days depending on complexity | ±0.02–0.05 mm on critical features when specified | Instant quote · typical prototype from $80 |
| Precision Machining ServicesMetals & plastics | From 3–8 business days (complexity dependent) | ±0.005–0.01 mm; Ra 0.4–1.6 μm; CPK ≥ 1.33 | Instant quote · quoted to drawing / inspection grade |
| Large Part CNC MachiningMetals & plastics | Quoted per project (fixturing and logistics driven) | Around ±0.025 mm on critical features; large spans project-dependent | Project quote · fixturing and logistics driven |
| Swiss CNC MachiningMetals & plastics | From 3–7 business days; faster on repeat batches | ±0.005 mm standard; down to ±0.0025 mm when specified | Instant quote · most economical in batch runs |
How we run precision jobs
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1
Step 1
Upload CAD (STEP/IGES) or 2D drawings — NDA available.
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2
Step 2
DFM review with quote and process advice typically within 12–24 hours.
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3
Step 3
Confirm material, precision grade, finishes, and inspection standards.
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4
Step 4
CAM, fixturing, first-article cuts, then SPC-monitored production.
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5
Step 5
Full CMM inspection, reports, packaging, and shipment.
DFM confirms which dimensions are truly critical. SPC, CMM, and CPK are applied to those, not to every chamfer on the model.
Partner quality systems align with ISO 9001, and with IATF 16949 or ISO 13485 when the program needs that paper trail.
Advantages and Trade-offs
Advantages
- Accuracy typically ±0.001–0.01 mm with mirror finishes to Ra ≤ 0.05 μm
- Integrated mill, turn, grind, EDM, HSM, and micro-machining workflows
- SPC / CMM / CPK process control for regulated industries
- Capability on titanium, Inconel, hard steels, and engineering plastics
Trade-offs
- Cycle time and inspection time both rise; a loose prototype drawing should not live on this page.
- Not every alloy or plastic is stable enough for the tightest band.
- Ultra-fine finishes can reveal material defects that a coarse mill would hide.
Design guidelines for precision machining
Datums and function first. Decorate later.
| Feature | Recommended practice |
|---|---|
| Tolerances | Tighten only fits that function. Blanket ±0.01 mm on a housing inflates cost. |
| Datums | Primary datums should match how the part locates in the real assembly. |
| Texture vs size | Call out Ra separately from dimensional tolerance. |
| Inspection | Say which features need CMM or CPK so the quote includes the report. |
Other CNC processes
CNC Machining Services
CNC machining removes material from solid stock with computer-controlled mills, lathes, and multi-axis centers.
プロセス詳細を見る
CNC Milling Services
CNC Milling Services use computer numerical control (CNC) mills to cut workpieces with rotating tools according to programmed toolpaths.
プロセス詳細を見る
CNC Turning Services
CNC Turning Services use computer numerical control lathes to remove material while the workpiece rotates at high speed and the cutting tool feeds along a set path.
プロセス詳細を見るPrecision machining FAQ
What is the difference versus standard CNC milling?
The machines overlap. Precision jobs add tighter process control, finer finishes, and documented inspection on the features you mark.
What accuracy bands do you publish?
Conventional precision around ±0.005–0.01 mm; ultra-high precision around ±0.001–0.002 mm when the drawing and the cell support it.
Do you machine titanium and Inconel?
Yes — Ti-6Al-4V and nickel alloys such as Inconel 718 are quoted after a process review.
Can I get inspection reports?
Yes. CMM reports and CPK data are part of the precision route when specified at quote.
Typical lead time?
Plan 3–8 business days depending on material, finish, and how many features are critical.
Precision Machining Services — engineering review before production
Use these process-specific checks when preparing your model, drawing and quote request. The confirmed quotation and approved drawing define the requirements for your part.
Define precision as an acceptance requirement
A narrow size tolerance, flatness control and positional tolerance are different requirements. Use a datum scheme, functional fits and clear drawing callouts to show what matters. Applying the tightest tolerance to every feature can add cost without improving the assembly.
Control the complete dimension chain
Material condition, thermal effects, workholding and finishing can all affect the result. Identify dimensions that must be measured after coating or heat treatment. Agree whether parts are measured freely or in a fixture when flexible geometry is involved.
Acceptance checklist
Provide the drawing revision, critical characteristics and report format. Discuss measurement capability and any first-article approval before committing to production quantities.
同様の3DプリントまたはCNC部品が必要ですか？
AIHFABSはCADアップロードからカスタム3DプリントとCNCの見積を出します。SLA、SLS、MJF、SLM、FDM、DLP、フライス、旋削を比較し、同じ注文でベイパースムージング、染色、陽極酸化、研磨、粉体塗装を追加できます。
インスタント見積
インスタント見積は試作、治具、ハウジング、小ロット向けです。材料、プロセス、数量、納期が揃って表示されます。
複数プロセス
材料、プロセス、数量、納期が揃って表示され、仕様変更が新たな問い合わせにならないようにします。
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ファイルアップロード
STL、STEPなど一般的なCADをアップロードしてオンライン見積。
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方案比較
同じ部品で3Dプリント技術とCNCを比較。
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材料と仕上げ
ポリマーまたは金属を選び、必要なら3D Plusハードウェア仕上げを追加。
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注文確認
決済前に価格と納期を確認。特殊仕様は手動見積。
このページのプロセス、業界、サンプルを再現したい場合は、アップロードから技術と仕上げを図面に合わせてください。
