precision machining

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What is CNC turning?

CNC turning is a cumbersome manufacturing process that manufactures turned parts by rotating the rod material against a cutting tool. It is usually used for functional prototypes and end-uses with axial and radial holes, flats, grooves and slots. Components. If your part design has symmetrical cylindrical or spherical features, it is recommended that you perform CNC turning.

CNC turning capability

CNC lathes can be divided into two types: lathes and CNC turning centers. The lathe has only 2 axes and is the most economical way to produce turned metal or plastic parts. The turning center integrates milling, drilling and counter spindle functions, and includes the Y axis, and is usually used to produce more complex designs.

Maximum part size

limitation Parameters (metric system)
Maximum turning diameter: 360~800 mm
Maximum cutting length: 270~1500 mm
Spindle hole: 45~100 mm
Fast moving speed: 20 m/min
Spindle speed range: 50-4200 r/mm
cnc turning process

Why use KME for CNC machining

dmf feedback and online quote

Instant Quotation & DfM

By uploading your CAD file, our platform can provide automatic quotation and DfM feedback based on big data for you to view. You can try different materials and finishing combinations in real time.

strong capabilities

Reliable ability

We have our own CNC workshop with more than 50 machines and more than 20 years of experience. We can process prototypes to orders for production parts, and the price is affordable and the delivery time is short.

Engineering support icon

Engineering support

Our aim is to always put the customer first. We are proud to have a dedicated customer success team that relentlessly provides online chat, email and phone support to ensure that the parts meet your expectations.

1M +
Parts production
10,000 +
Clients served
ISO 9001

Real customer feedback

CNC turning materials

The variety of materials available is another advantage of CNC turning. At Green Bat Technology, you can choose from more than 50 metal and plastic materials. We also provide Material Certification At your request.


Aluminum is a highly ductile metal and easy to process. The material has a good strength-to-weight ratio and can be used in multiple types in multiple applications.


  • Al 6061

  • Al 6061-T651

  • Al 6063

  • Al 7075

  • Al 6082

  • Al 2024

  • Al 5052

  • Al 5083

  • Al ADC12 (A380)

CNC machining raw materials-Al


Copper has excellent thermal conductivity, electrical conductivity and plasticity. It also has high ductility, corrosion resistance, and is easy to weld.


  • copper
  • copper101
  • Coppe for EDMr
  • Beryllium copper
  • Chrome Zirconium Copper
  • Tungsten Copper
  • Antimony Copper
CNC Machining Material-Copper


Brass has characteristics required for many applications. It has low friction, 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

  • Galvanizedsteel/ 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

magnesium alloy


  • AZ91D
  • AZ31B、AZ31S、AZ31T
  • AM60B、AM50A
  • AZ61A、AZ61M、AZ61S
  • ZK61M、ZK61S
  • AZ62M、AZ63B
  • AZ80A、AZ80M、AZ80S
  • AZ40M、AZ41M
  • LA141 、LA191 、LAZ933
  • LA81、LA91、LAZ931
  • LZ91、LZ61、LZ121
  • MA18、MA21、MA14
  • M1C、 M2M、M2S
  • ME20M
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 treatment

In addition to customized CNC milling and turning services, we also provide complete surface finishing options for precision machined parts.

Anodizing can improve corrosion resistance, enhance wear resistance and hardness, and protect metal surfaces. Widely used in mechanical parts, airplanes, auto parts, precision instruments, etc.

surface finish - anodizing

Sandblasting will make the surface of the part smooth and rough texture. Mainly used for vision applications, then other surface treatments can be performed.

Surface treatment-sandblasting

The powder coating forms a durable, wear-resistant and corrosion-resistant layer on the surface of the part. Powder coatings can be used to apply color to parts and are compatible with any metal.

Powder Coating Image

Electroplating can be functional, decorative or corrosion related. Many industries use this process, including the automotive industry, where chrome plating of automotive steel parts is common.

Electroplating Image

Polishing is the process of creating a smooth and shiny surface through physical friction or chemical interference of parts. The surface produced by this process has obvious specular reflection, but diffuse reflection can be reduced in some materials.

Polishing Image

Brushing is a surface treatment process in which, usually for aesthetic purposes, an abrasive belt is used to draw marks on the surface of the material. Most commonly used in aluminum.

Brushing Rapid Direct

Painting the surface of parts can improve their aesthetic appearance and can provide consumers with brand awareness. In addition, painting may have a protective effect on the parts.

Painting Image

Quality report and certification

full dimensional quality reports


In the production process of each project, we strictly abide by the requirements of ISO 9001:2015. We can provide material certification, SGS and ROHS certification, please contact our sales team upon your request.

Material certification

Quality inspection

We have a dedicated team of engineers who will always provide you with best practices. During the production process, the quality department conducts in-process quality control every 30 minutes to minimize risks.

First part verification

additional services

KME respects your intellectual property rights, and we always welcome you to NDA Agreement for all orders. For production orders, you can apply for first article inspection. Finally, you can enjoy our rework and refund policy at any time.

CNC turning design recommendations

Due to the processing characteristics, the design criteria for CNC turning and CNC milling processes are slightly different. Following these recommendations can greatly improve production efficiency and reduce costs. Learn more about the CNC design guide.

Recommended: 0.8mm (metal), 1.5mm (plastic)

The smaller the wall thickness, the smaller the stiffness of the material. This can cause vibration during machining and reduce accuracy. We recommend that you use a larger minimum wall thickness for plastics.

wall thickness cnc turning Image

Recommended diameter: Standard drill size

Recommended depth: 4-40 times the nominal diameter

The tool used for drilling is a drill or an end mill. For high-precision holes smaller than ⌀20mm, standard diameters are recommended.

holes cnc turning Image

Recommended size: Above M6

Suggested length:3 times the nominal diameter

Threads are divided into internal threads and external threads. The internal thread is cut with a tap, while the external thread is cut with a die. Taps and dies can be used to cut threads to M2. CNC threaded tools are common and are therefore preferred because they limit the risk of tap breakage.

Thread cnc turning image

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