Ningbo Hewcho Industrial Limited.

Turning Service Turning Service

CNC turning is one of machining process. Same as other machining processed, during the cutting, part of the initial material is removed. The machinery that carry out this process is called turning machine or lathe.

Ningbo Hewcho offers metal precision CNC turned parts including carbon steel, stainless steel, aluminum, brass, and copper. This capability utilizes state of the art vertical turning machines and lathes that utilize advanced features, which allow us to turn complex, precise, geometries. We can accommodate work pieces up to 60mm in diameter and 120mm in length with tolerances to ±0.01mm.

What is turning and how the production done?

What are CNC turned parts?

Turned parts are important functional components for products and can be found in many areas of today's era. Thus, with the introduction of CNC technology, the application possibilities of these turned components could be further extended. Whether the smallest micro parts for the watch industry or long turning parts for mechanical engineering, where something rotates or moves is usually a turning part behind it. Here, very hard materials such as titanium as well as soft materials such as plastic parts be machined with high process accuracy and cost-optimized, which is why the production of turned parts has become an integral part of production in many areas.

How is the production done?

Turning belongs to the group of separation processes and takes place on manual lathes or CNC controlled lathes. In this machining process, as opposed to milling, the workpiece rotates about its own axis, so the main cutting motion is performed by the rotating workpiece. In order to lift a chip while the tool is moved with a carriage along the rotating workpiece. Thanks to the latest developments in the field of lathe technology, complex filming can now be carried out, which was previously only possible on milling machines.

Which axes are available when turning?

The axis of rotation of the main spindle, around which the workpiece and the chuck rotate, is called the Z-axis when turning and runs from the chuck towards the tailstock. The X-axis is perpendicular to it. A Y-axis is not necessary during normal turning because the tool height above the XZ plane is fixed when setting up the lathe. In contrast, the angle of the main spindle is often displayed as a third coordinate on CNC-controlled lathes. The scale division on the X-axis doubles the actual movement when turning, as the movement of the tool affects the radius of the workpiece.

Examples for turned parts
Turning complex contours Turning with finish machining Precision turning parts
Turning complex contours Turning with finish machining Precision turning parts

Tools and cutting materials for turning
Roughing or finishing
The right choice of tools is an essential quality feature when turning, which is why different tools are used depending on the requirements. Thus, the cutting radius determines whether a tool can be used for roughing or finishing and is an important selection criterion. The following applies: In general, inserts with a radius of less than 0.8 mm are used for finishing . If the radius of a cutting edge is larger, the tool is ideal for roughing.

The right tool for every material
When turning metallic materials such as stainless steel , aluminum or brass a large chip formation occurs, which is why the machining process usually hard inserts with a chip breaking edge are the optimal manufacturing solution. For brittle materials such as gray cast iron, it makes sense to use ceramic inserts with a smooth surface. The service lives depend on the cutting speed, the feed rate and the material.

Cutting materials in turning
The correct selection of the cutting material is aimed at wage turning according to the material to be machined and the economic efficiency. Important properties for the selection of the suitable cutting material are its wear resistance, which can be significantly increased by coatings. Depending on the material, different cutting materials are used due to the different properties.

Precision CNC Turning Service Feature

Machinery Axis

2 X and Z



Carbon Steel

Stainless Steel



Alloys Steel

Bronze Alloys










Turning Diameter

Up to 75mm/3In

Turning Length

Up to 150mm/6In

Turning Tolerance


Inspection Capabilities



Imaging Measuring Instrument


Metallographic Microscope

Non-destructive Equipment

Automatic Thread Inspection Equipment

Surface Finished

Zinc Plated

Sand Blasted

Nickel Plated


TD Coating



Zinc-Nickel Plated

















Advantage and Application

The advantages of turning

Turning has many advantages over other machining processes. The following advantages make this technology an important basic technology.

●High dimensional accuracy

●Consistent quality

●Great productivity

●An extensive variety of materials

●Low tool wear

Where turned parts are used

Turned parts find a variety of applications in today's industry. Wherever something turns or moves, often turned components are used :

●Electrical Appliance Industry

●Automotive Industry

●Electronics Industry

●Connection technology

●General Industry

●Machinery and equipment

Related Products
  • TEL:+86 574 62387787
  • FAX:+86 574 62387788
  • EMAIL: info@hewcho.com
  • ADDRESS:No.13 Baiheqiao Rd,L ubu Town, Yuyao City,Zhejiang Province, China