Our online CNC machining services

Having 200 sets of 3, 4, and 5-axis CNC machines and a wide range of auxiliaries in China, RapidDirect is your ideal choice for custom CNC machining requirements. No matter what tolerance, materials, surface finish is needed for your CNC parts, quick-turn prototype in one day, or production parts for months, RapidDirect can always manage to achieve, within the promised lead time.

CNC milling Services Rapid Direct

CNC Milling

3-axis CNC milling price rate as low as $10 per hour, 5-axis CNC milling center highest tolerance up to 0.002". Cost-effective CNC milling process for prototype machining and production parts.
CNC Turning Services Rapid Direct

CNC Turning

Self-owned workshop with 50+ CNC Lathes and CNC turning centers, providing cost-effective prototype and production machining services with faster lead time. Live tooling available for complex projects.

Upload CAD files and get a FREE quote today!

Why CNC Machining with RapidDirect

dmf feedback and online quote

Instant Quoting

No more email back-and-forth, by simply uploading your design files and selecting the material and surface finish, our big-data-driven platform calculates an accurate and competitive CNC quotation in real-time.

strong capabilities

Strong Capacity

Having been in this industry for nearly 2 decades, RapidDirect has developed a team of engineers with profound CNC project experience. Get machining parts suggestions that achieve the same function at a lower cost.

Guaranteed Quality RD

Guaranteed Quality

Quality is the cornerstone of the manufacturing business. We passed ISO 9001:2015, and provide SGS, RoHS material certifications, first article inspection, full-dimensional inspections on your request.

Materials for CNC Machining Parts

CNC machining have a long list of available materials for CNC prototypes and manufacturing parts, from hard metals like stainless steel and titanium, to soft metals such as aluminum, copper, brass, all the way to plastics including ABS, PC, PA, etc.


Aluminum is a highly ductile metal, making it easy to machine. The material has a good strength-to-weight ratio and is available in many types for a range of applications.


  • Aluminum 6061

  • Aluminum 6061-T651

  • Aluminum 6063

  • Aluminum 7075

  • Aluminum 6082

  • Aluminum 2024

  • Aluminum 5052

  • Aluminum 5083

  • Aluminum ADC12 (A380)

cnc machining raw material - aluminum


Copper displays excellent thermal conductivity, electrical conductivity and plasticity. It is also highly ductile, corrosion resistant and can be easily welded.


  • Copper
  • Copper 101
  • Copper for EDM
  • Beryllium copper
  • Chromium zirconium copper
  • Tungsten copper
  • Antimony copper
cnc machining raw material - copper

Brass / Bronze

Brass has desirable properties for a number of applications. It is low friction, has excellent electrical conductivity and has a golden (brass) appearance.


  • Brass 2680
  • Brass H59
  • Brass H62
  • Brass 260
  • Brass 385
  • Brass CAD260
  • Brass 360
  • Tin phosphor bronze
  • Aluminum bronze plate
  • Tin bronze
cnc machining raw material - brass



  • 1045 Steel (45 #)

  • 1008 Steel

  • 1018 Steel

  • 1020 Steel

  • 1025 Steel

  • 11Smn30 Steel

  • 1215 Steel

  • 4041 Steel

  • 40Cr Steel

  • 4130 Steel

  • 4137 Steel

  • 4140 Steel

  • 42 Crmo Steel

  • 4340 Steel

  • 4J36 Steel Alloy

  • 5140 Steel

  • 5160 Steel

  • 60Si2Mn Steel

  • 65Mn Steel

  • A2 Tool Steel

  • A36 Steel

  • C3600

  • Class 8 Gray iron

  • Cr12Mov Steel

  • D2 mould steel

  • DC-01 Steel Cold rolled steel

  • EN16T Steel

  • EN3B Steel

  • EN8T Steel

  • H13 Steel

  • Inconel Steel

  • Invar 36 Steel

  • NAK80 Steel

  • P20 Steel

  • S136 Steel

  • S7 Steel Tool Steel

  • SK5 Steel

  • SKD11 Steel

  • SKD61 Steel

  • SKH51 Steel

  • ST37 (Q235) Steel

  • ZGmn13-5

  • Galvanized Steel / SGCC / SECC

  • S7 Steel

  • SCM440 (40CrMo) Steel alloy

  • 52100 Bearing Steel

cnc machining raw material- steel

Stainless Steel


  • SUS304 Stainless steel

  • SUS303 Stainless steel

  • SUS301 Stainless steel

  • SUS316 Stainless steel

  • SUS316L Stainless steel

  • SUS401 Stainless steel

  • SUS416L Stainless steel

  • SUS416 Stainless steel

  • SUS420 Stainless steel

  • SUS201 Stainless steel

  • SUS430 Stainless steel

  • SUS431 Stainless steel

  • SUS440C Stainless steel

  • SUS410 Stainless steel

  • SUS630 / 17-4PH Stainless steel

  • PP631 / 17-7PH Stainless steel

raw material - stainless steel bar / rod



  • TC4 Titannium Alloy
  • TC5 Titanium Alloy
  • Military-grade titanium Alloy
  • Food-grade titanium Alloy
  • R53400 Titanium Alloy 9
cnc machining product - titanium



  • ABS
  • PC
  • ABS+PC
  • PMMA
  • POM
  • PP
  • PA
  • PEEK
  • PET
  • PVC
  • PPSU
  • PPS
  • PTFE
  • PBT
  • PE
  • PEI
  • HDPE
  • UPE
  • CPVC
  • EPP
  • FR-4
  • HIPS
  • LDPE
  • PAI
  • PETG
  • PPA
  • PS
  • PVDF
  • Bakelite
Engineering Plastics

CNC Machining Surface Finishes

Apart from custom CNC milling and turning services, we also provide complete surface finishing options for precision machined parts.

Anodizing improves corrosion resistance, enhancing wear resistance and hardness, and protecting the metal surface. Widely used in mechanical parts, aircraft, and automobile parts, precision instruments, etc.

surface finish - anodizing

Bead blasting results in parts with a smooth surface with a matte texture. Used mainly for visual applications and can be followed by other surface treatments.

surface finish - bead blasting

Powder coating forms a durable, wear resistant and corrosion resistant layer on the surface of parts. Powder coating can be used to apply colors to parts and is compatible with any metal.

Powder Coating Image

Electroplating can be functional, decorative or corrosion-related. Many industries use the process, including the automotive sector, in which chrome-plating of steel automobile parts is common.

Electroplating Image

Polishing is the process of creating a smooth and shiny surface, either through physical rubbing of the part or by chemical interference. The process produces a surface with significant specular reflection, but in some materials is able to reduce diffuse reflection.

Polishing Image

Brushing is a surface treatment process in which abrasive belts are used to draw traces on the surface of a material, usually for aesthetic purposes. Most commonly applied to aluminum.

Brushing Rapid Direct

Painting the surface of a part improves its aesthetic appearance and can provide brand recognition to consumers. In addition, painting can have a protective effect on parts.

Painting Image

Standard Tolerances For CNC Machining

Our standard tolerances for CNC machining of metals is DIN-2768-1-fine and for plastics is DIN-2768-1-medium. Tolerances are greatly affected by part geometry and type of material. Our project managers will consult with you on every part of your project and will seek to provide the highest degree of precision possible.


Rapid Prototyping
Rapid Prototyping

CNC machining is ideal for rapid prototyping applications for its compatibility with a broad range of cost-effective materials, and its rapid turn-around for precise parts and prototypes. We work with our customers to design and produce prototypes that meet their manufacturing requirements and quality standards.

Rapid Tooling
Rapid Tooling

Our CNC machining service is ideal for rapid tooling to test and validate the part design and material in the prototyping stage. At RapidDirect, we specialize in the production of high-quality tools used in injection molding and other tooling applications.

Direct Manufacturing
End-Use Production

At RapidDirect, we offer customers end-use production CNC machining service that has broad material compatibility, high-quality surface finishes, with consistently high precision. We also provide the option to work with custom raw materials.

Quality Reports & Certifications

full dimensional quality reports

Full dimensional report

Details of all required part dimensions accompany the part, giving you peace of mind that the part will function and fit as designed.

Material certification

Material certification

We provide material certification with our products, providing traceability to material characteristics.

First part verification

First part verification

We can ship two sets of parts to the customer for verification on your request. Once the parts have been validated, we can move into full production.

Get Your Parts Into Production Today

Only 4 simple steps to complete your project. Follow the instruction and give it a try!

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