What Is Milling (CNC Router) Cutting and Which Materials Is It Used On?

Milling is the process of controlled chip removal from the material surface with the help of rotary cutting tools. During the process, the workpiece may remain stable or move; The cutting tool rotates at high speed and forms the desired geometry. This method; It can be used in different operations such as flat surface treatment, grooving, hole enlargement, contour cutting and three-dimensional profiling.

Milling cutting service is applied to many metal materials, especially steel, stainless steel, aluminium, copper and brass. In addition, some engineering plastics and composite materials can also be cut to milling with appropriate cutting tool and cutting parameters. The hardness of the material, the heat treatment state and thickness play a direct role in determining the milling cut method and tool selection to be applied.

The Difference Between CNC Milling Cut and Manual Milling Cut

The main difference between the CNC milling cut and the manual milling is how the process control is achieved. In manual milling cutting, the operator manually guides the movement and cutting depth of the tool. This method may be suitable for simple geometries and low-quantity productions, but reproducibility and tolerance consistency vary depending on the operator’s experience.

In CNC milling cutting, the process is carried out through a CNC program produced from computer-aided design (CAD) data. For example, in a 50-piece aluminium flange series, deviations around ±0.1 mm can be seen in each piece with a manual milling cut, while a consistent result can be obtained in a much narrower band of tolerance of ±0.02 mm across the same series as the CNC milling cut. Similarly, in complex duct and pocket geometries, CNC milling cuts allow serial and repeatable processing of forms that cannot be produced practically by manual method thanks to the possibility of multi-axis movement.

As a result, while manual milling cuts in low quantity and simple parts can offer cost advantage; CNC milling cuts are preferred for medium and high-volume, tight-tolerant or complex geometry productions.

How to Determine the Sensitivity and Tolerance Values in Milling Cuts?

Milling precision; The rigidity of the machine used depends on many variables such as the condition of the cutting tool, the cutting speed, the rate of progress and the machinability of the material. In sectoral applications, the tolerance values are shaped according to the precision requirement of the assembly or system where the part will be used.

Tolerances in the range of ±0.1 mm to ±0.05 mm are widely considered to be sufficient in structural parts used in general machinery manufacturing; A tolerance in the range of ±0.02 mm to ±0.01 mm can be demanded in hydraulic-pneumatic fasteners and mechanical components requiring precise installation. In critical sectors such as aerospace, defense industry and medical device production, it is a standard practice to request a micron level tolerance control and a measurement report for each party.

When determining the tolerance values, it should be considered that not only the functional requirement of the part, but also that the measurement and quality control processes can verify these values. For this reason, the demand for tolerance in milling cut projects should be clarified through the technical drawing before production.

In Which Sectors Is the Milling Cut Used?

Milling cut takes place as a basic production method in many industries with different scale and precision requirements:

● Machinery manufacturing industry: In the manufacture of gearbox bodies, flanges, carrier plates and fasteners.

● Automotive and sub-industry: In the production of mould components, apparatus and fixtures.

● Energy sector: In the processing of turbine and generator components.

● Aeronautics and defense industry: In the production of tightly tolerant structural and mechanical parts.

● Medical device industry: In device body and components that require precise geometry.

● White goods and electronics industry: In the processing of case, refrigerant and assembly parts.

The common point of these sectors is that the milling cut method can give consistent results both in the production of one-piece prototype and in mass production.

How Does the Choice of Material in the Cutter Cut Affect the Result?

Selection of material in milling cut; It directly affects processing speed, tool life, surface quality and mechanical strength of the final part. For example, aluminium alloys can be processed at high speeds due to low cutting resistance, while lower progress rates and more frequent tool change may be required for ductile and abrasive materials such as stainless steel.

The heat treatment state of the material is another factor that affects the result. Hardened steel parts require milling cuts, more specific cutter geometries and cooling strategies, while annealed materials can be operated more efficiently with standard parameters. In addition, since the internal stresses of the material may increase the risk of deformation in the part after cutting, pre-cutting stress relief may be recommended for critically tolerant parts.

Choosing the right material and determining the appropriate cutting parameters is an engineering decision that directly affects both the production cost and the quality of the parts.

Milling Cutting Services of Industrial Cutting

As industrial cutting, we offer milling cutting services for B2B supply chains with our milling cutting infrastructure and technical team. We plan production in different volumes from prototype production to mass production in line with technical drawing and tolerance demands. Material supply, cutting and necessary additional processes (such as surface treatment, drilling, welding preparation) can be managed in a single production flow.

It is important to share technical drawing, material type, quantity and tolerance information in milling requests, accurate production planning and determining realistic delivery time.

Milling Cut Prices

Milling cut prices; The complexity of the part geometry varies according to the material type and thickness, the desired tolerance level, the number of production and additional processing requirements (surface coating, additional hole operations, etc.). Unit cost may increase as the processing time will be extended for parts that require tight tolerance and multi-axis processing; On the other hand, the cost of pieces based on mass production is generally reduced.

You can share your technical drawing and production requirements with us to get a special cutter cut price quote for your project.