CNC Turning Service

With our latest CNC lathes and turning centers, even the most complex turned parts are possible

  • Tolerances down to ±0.0004″ (0.01mm)
  • Parts as Fast as 1 days
  • Aluminium, Steel, Copper, Polymers & More
  • Lathe & Live tooling

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Why Choose Our CNC Turning Service

Do you have a project that requires you to make deep holes, threads, and various intricate cylinder and round shapes? If so, we create practically all rounded surfaces, including deep holes, grooves, threads, outer cylinder surfaces, inner and outside corner surfaces, and vertical round surfaces.

Our specific CNC-Turning machine series will create accurate parts for you without any volume limit in a very short time. In addition, a team of engineers from Prolean will ensure that your part fits the requirements through regular communication.

How to Order parts?

Get a free quote from a real Engineer, Once we receive your design, Our engineer will review it and send you a quotation as fast as one hour.

Get One Hour Quote

Upload your design or send an email directly to our engineer and get your quotes within as fast as one hour

Start Production

Your parts will get made once your orders confirmed, besides, your will get real-time updated of the production status from our order tracking system

Receive Your Custom Part

After all parts pass qc inspection, they will be well packed from any transportation accidents. Then, your custom parts are delivered straight to your doorstep

CNC Turning Materials Options


Aluminum is a superior metal in terms of strength-to-weight ratio. It offers High Machinability, ductility, and thermal & electrical conductivity. Parts with aluminium also become highly resistant to corrosion.
Aluminum (MIC6)
Aluminum (2024)
Aluminum (5052)
Aluminum (5083)
Aluminum (6082)
Aluminum (6061-T6)
Aluminum (6063)
Aluminum (7075-T6)

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Golden shiny color, low friction, excellent Machinability, and high electrical & thermal conductivity. Brass can be easily machined and the best choice for low-friction applications.

Brass (360)

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It offers good strength, hardness, and excellent corrosion resistance with superior heat and thermal conductivity. It also has a very appealing aesthetic.
Copper 101
Copper 110

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40% more strength-to-weight ratio than steel, Excellent corrosion resistance, low thermal expansion, and biologically inert. These properties make it perfect for automotive, aerospace, and medical applications.
Grade 1 Titanium
Grade 2 Titanium
Grade 5 Titanium(TC4, Ti6Al4v)

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Alloy Steel
High mechanical strength, toughness, resistance to wear and fatigue, and sturdiness. In addition to carbon, other alloying elements can be added depending on the needed mechanical and physical qualities.
Alloy Steel 4130
Alloy Steel 4340
Steel (4140 Alloy)
Steel (1018 Low Carbon)
Tool Steel (A2)
Zinc-Galvanized Low-Carbon Steel
Carbon Steel (1045)

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Stainless Steel
High mechanical strength, Thermal, Wear, and Corrosion resistance. Stainless steel is low-cost and can be machined easily. Parts made from Stainless steel are durable and do not lose that strength over time.
Stainless Steel 201
Stainless Steel 301
Stainless Steel 303
Stainless Steel (304L)
Stainless Steel (316L)
Stainless Steel (410)
Stainless Steel (420)
Stainless Steel (440C)
Stainless Steel (17-4 PH)

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Cast iron
It offers three to five time’s higher compression strength than steel. Low notch sensitivity, Good Resistance to deformation, excellent anti-vibration, and consistent mechanical properties

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Excellent strength, extraordinary impact, and abrasion resistance with chemical inertness. ABS can be machined easily and is very easy to paint and glue.

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Acrylic is a lightweight, rigid thermoplastic with optical clarity. It is one of the superior alternatives to glass, offering excellent weather and chemical stability.

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High tensile strength, excellent Machinability, Stiffness, wear resistance, creep resistance, and low friction. Overall, Delrin is the ideal replacement for metal.
Delrin (30% Glass-Filled)

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Garolite G-10
High strength to weigh ratio, fire resistive, low thermal expansion coefficient, and water absorption coefficient are entirely free from corrosion risk. Garolite is perfect for insulating parts and electric circuit boards.

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FR-4 is a manufacturing material with strength almost equal to steel and lightweight. It is a perfect fit for making parts for the electrical marine industry since it is flame retardant, has a negligible water absorption coefficient, and is machinable.

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Polyethylene (PE)
Polyethylene is known for its malleable properties. It offers a high strength-to-weight ratio, impact strength, chemical inertness, temperature, and weather resistance.

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Mechanical properties include high resilience, tensile strength, and fatigue resistance. Nylon is a flexible manufacturing material that is highly resistant to abrasion, heat, chemicals, water, and oils.
Nylon (30% Glass-Filled)

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A versatile engineering material with high mechanical strength. It provides excellent thermal and chemical resistance. Parts from PEEKS are durable and can be operated at an extensive range of temperatures (up to 2600).
PEEK (30% Glass-Filled)

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Exceptional mechanical properties, including impact strength, toughness, Stiffness, and creep resistance. Because of its transparent nature, Polycarbonate (PC) is a lightweight alternative to glass.

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A low-cost material with good Stiffness, impact resistance, and chemical stability. PP also offers excellent wear resistance and elasticity.

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PPSU(Polyphenylene sulfone resins)
PPSU is used in various sectors because of its lightweight, high toughness, great impact resistance, high heat resistance, chemical stability, transparent color, and wide operating temperature range

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PPS (Polyphenylene)
The unique combination of Physical, mechanical, and chemical properties. Excellent strength, rigidity, fatigue endurance, creep resistance, chemical inertness, and a wide range of working temperatures for the fabricated parts make it a perfect choice for electrical applications with high operating temperatures.

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PTFE (Teflon)
High chemical inertness, thermal stability, electrical insulation, and corrosion resistance. Teflon is a low-friction substance that is perfect for making non-sticky and sliding parts for various industries.

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polyetherimide (PEI)
Semi-transparent, high strength, rigidity, thermal stability, chemical inertness, and dimensional stability. Parts made from PEI can work for an extended period without stress cracking.

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PMMA (Acrylic)
Transparent, lightweight, strong mechanical strength, hardness, thermal stability, and chemical inertness. Transparent nature makes it an excellent alternative to glass.

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Excellent Stiffness, flame resistance, weather resistance, dimensional stability, and chemical inertness. PVC is appropriate for pipelines, medical devices, outdoor appliances, and electrical insulation.

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CNC Turning Material Guide

Aluminum Rapid Prototyping

“At our facility, we offer specialized services in aluminum CNC turning, catering to a wide range of industrial needs. Recognized for its lightweight, strength, and versatility, aluminum has become a favored material in CNC turning. Our expertise shines particularly in aluminum rapid prototyping. This service allows designers and engineers to swiftly transform their ideas into tangible prototypes, accelerating the design and testing process.

Turning Service Finishing Options

As the machined or deburring

The machined or deburring finish is the standard finish where unwanted attach chips are removed with deburring tools, and sharp edges are chamfered to smooth the surface (3.2 μm).

Bead Blasted

Bead blasting produces a matte texture, removing all the marks of machining tools. It applies to ABS, Aluminum, Brass, Stainless Steel, and Steel parts.


Anodizing involves adding an aluminum oxide coating to aluminum and its alloys. The layers, which come in various colors, increase strength and shield the surface from corrosion.

Powder coating

Powder coating is the electrostatically applying of dry powder to the surface. It produces a thin layer providing excellent resistance to wear, corrosion, and abrasion.


Physical rubbing of a metal surface to create a shiny surface is called a polishing surface finish. It increases the reflectivity and does not affect the dimensional stability of parts.


Brushing is achieved by applying an abrasive brush to the metal surface, which produces a unidirectional satin finish. And it is not recommended for highly corrosive materials.

Smooth machining

Smooth machining is done by controlling the machining process, such as feed rate & cutting speed. It minimizes the tool marks and risk of corrosion.


Black oxide finish reduces surface reflectivity and offers mild corrosion protection. It involves adding a thin layer of magnetite to the surface.


Electro-less Nickel Plating

A thin layer of Nickel is created on the surface from a nickel-containing solution without electrolysis. Electro-less nickel plating provides a shiny appearance, excellent hardness, abrasive, wear, and corrosion-resistance to the substrate material.


Provides excellent corrosion resistance property to the aluminum parts with greenish-gold color. It is the low-cost and quick surface finishing approach.


Electroplating increases the hardness of the steel &aluminum parts. It offers excellent corrosion, wears, and abrasion resistance.

Nickel plating

Make the parts super resistive to corrosion. It enhances mechanical strength, hardness, wear resistance, lubricity, and ductility. Nickel plating is applicable in different materials, including Steel, aluminum, copper, and brass.


Enhance the appearance and functionality of the parts. After Passivation, parts of Steel and its alloys become super resistive from corrosion.

Yellow Chromate conversion coating

A shiny appearance with goldish color provides excellent corrosion resistance. It is applied on the surface of aluminum, magnesium, and their alloys. A layer of chromate also enhances the conductivity of parts

PTFE (Teflon) Coating

The Teflon layer on the parts offers excellent corrosion resistance, water resistance, and non-stickiness with a non-reactive surface.

Fine machining

The higher-precision machines produce delicate machining surfaces by utilizing sharper tools and regulating feed rate and cutting speed. Surface roughness up to Ra 0.8 μm can be maintained with smooth machining.

Laser Cladding

Provides excellent corrosion, wear, and abrasion resistance. Laser Cladding is also effective for treating minor surface imperfections such as cavities, tiny cracks, and rust damage.


Provides a random, non-linear texture with a shiny, high gloss finish. However, it might be unable to create sharp corners and pockets

Precision Turning Machining Tolerances


CNC Turning Service

Manufacturing Specifications & Capabilities



No Drawing

Linear dimension +/- 0.025 mm
+/- 0.001 inch
ISO 2768 Medium
Hole diameters (not reamed) +/- 0.025 mm
+/- 0.001 inch
ISO 2768 Medium
Shaft diameters +/- 0.025 mm
+/- 0.001 inch
ISO 2768 Medium
Part size limit Φ1000*2000mm
Φ39.4 * 78.7 inch
ISO 2768 Medium

3 Ways to Ensure Perfection



For metals, the standard is ISO-2768 fH (fine)

For plastics, the standard is ISO-2768 mK (medium)

Metric threads tolerances:ISO 965-1 standard UN Threads Tolerances: ASME B1.1-2003 standard

knurling: ISO13444:2012 standard Our factory is ISO 9001:2015 certificated

Visual inspection and Protection

Constant visual inspection conditions

Quantification of cosmetic surface quality

Process requirements

Part cleaning and Protection

Quality Inspection Report

Inspection Confirmation

Dimensional confirmation

Appearance confirmation

Quality documentation

Technology Overview

What is CNC Turning?

CNC turning is a fully computer-controlled manufacturing process in which a round workpiece spins and a tool is fed into it. During the turning process, material from the work piece’s outer surface is removed by feeding it into the tool to create the desired shape. The computer program ultimately dictates the removal process.

The CNC turning process can work in both axes of rotation (horizontal and vertical). Turning can machine a wide range of material bars, from Nylon to Titanium, brass, and steel, with the help of drilling, boring, reaming, grooving, threading, knurling, and taper turning according to CAD and input instructions.
If you are looking to produce profiles with axial symmetry, like cones, cylinders, disks, or a combination of those shapes, CNC turning is definitely for you.

Working Principle of CNC Turning

The working principle of CNC turning is executing computer code on a CAD file to remove material from the outer surface of the work bar to achieve the desired shape. The CNC turning process is finished in four major steps, creating a digital representation (CAD), generating machining code from CAD files, CNC lathe setup, and manufacturing turned parts from computer input instructions.

The raw material bar is first attached to the chuck, which begins to rotate following the input speed. Following this, the cutting tool is started to feed the material so that the desired shape can be produced. The turning tools are available in various speeds and sizes to create a particular shape from the workpiece. Even though the CNC turning process is numerically controlled, manual supervision is still required to guarantee precise shape and tight tolerance.

CNC turning can work with cylinder-shaped, square-shaped, or hexagonal-shaped objects. However, the most typical shape is the cylindrical one.

Different types of CNC Turning

While there are many different CNC turning processes, some of the most common ones include taper turning, step turning, contour turning, grooving, parting, threading, and more. The primary distinction between these turning processes is how the material is fed into the various turning tools.

Taper turning is gradually reducing or increasing the diameter of a cylindrical workpiece to produce a conical surface. In contrast, a step-up turning involves a sudden increase or decrease of the diameter. The cutting tool axially follows a trajectory with a predefined geometry when performing a contour turning operation.

A narrow cut called a “groove” is made around the workpiece’s cylindrical surface within the specific segment during the grooving. The parting process looks like grooving, but the cutting tool reaches the part’s axis and cuts off a section.

In the turning process known as threading, a tool is moved along the side of a cylindrical workpiece to create continuous helical grooves. The boring is related to internal turning, increasing the hole diameter’s accuracy, where a pre-formed hole is enlarged through this process.

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What's the lowest thickness for the turning process I can use in my design to avoid warpage?

We recommend a minimum thickness of 0.8 mm for metal and 1.5 mm for plastic. The value, however, is heavily dependent on the size of the parts to be manufactured. For instance, you might need to lower the minimum thickness limit for large parts and raise it for much more minor parts to prevent warpage.

What is a CNC turning center?
A more sophisticated version of a CNC lathe, a CNC turning center removes material with cutting tools to more precisely create the product. Vertical and horizontal turning centers are the two types of CNC turning centers. The spindle is oriented horizontally in horizontal turning centers instead of vertically in vertical centers, enabling the headstock to rest on the floor and the faceplate to function as a flat rotating table.
What are the advantages of CNC turning?
The CNC turning process has several benefits, including precisely creating complex geometries and more effective use of material since only the necessary sections are machined. In addition, with CNC turning, highly accurate parts are produced in a short time. Overall, it’s a versatile approach.
What can be produced using CNC turning?
CNC turning is a game-changer manufacturing approach for a variety of industries. For example, in the automotive sector, CNC turning is used to make engine blocks, engine blocks, engine shafts, brake rotors, steering components, wheel hubs, and other parts. The aerospace industry uses CNC turning to create components for wings, engines, landing gears, and other features. In addition, CNC turning requires high precision for medical instruments like prosthetic implants, processing equipment, and replacement joints.

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