Mechanical Cutting vs. Laser Cutting vs. Milling – Technology Comparison

Mechanical and laser cutting are widely used manufacturing processes in modern industry. Each technology uses different equipment and offers its own advantages and limitations.

Choosing the most suitable method depends on the material, required precision, component geometry, manufacturing costs and available equipment.

Mechanical Machining: Machines, Tools and Processes

Mechanical machining uses cutting tools to remove material and create the required shapes. Common machines include lathes, milling machines and drilling machines.

Lathe

A lathe is a metalworking machine in which the workpiece typically rotates while a cutting tool removes excess material.

Turning is commonly used to manufacture rotational components, machine holes and cut threads.

Cutting fluids are often used to control temperature, reduce friction and remove metal chips.

Milling Machine

Milling is a mechanical machining process in which a rotating cutting tool performs the main cutting movement.

Manual or CNC-controlled milling machines can produce accurate flat surfaces, slots, holes and complex geometries.

Milling offers high precision, flexibility and repeatability in manufacturing.

Drilling Machine

A drilling machine uses a rotating drill bit to create holes in a material. Threads can subsequently be produced using appropriate tapping tools.

Depending on the machine type, holes can be machined at different depths and positions.

CNC drilling machines and machining centres are commonly used for precision manufacturing and allow controlled movement along multiple axes.

Laser Cutting Equipment and Methods

Unlike mechanical machining, laser cutting is a non-contact process.

It uses a highly concentrated laser beam to heat, melt or vaporize material along the cutting path. Assist gas also helps remove material from the cutting kerf.

Laser cutting machines are typically CNC-controlled, enabling high precision and repeatability.

Two important technologies in industrial laser cutting are CO₂ lasers and fiber lasers.

CO₂ Laser

A CO₂ laser is a gas laser that uses a mixture of gases, primarily carbon dioxide, nitrogen and helium, as its active medium.

It typically produces infrared radiation with a wavelength of approximately 10.6 micrometres.

CO₂ lasers are used for cutting, welding and engraving various materials, as well as in certain medical applications.

Fiber Laser

A fiber laser is a type of solid-state laser that uses an optical fiber doped with rare-earth elements, commonly ytterbium, as its active medium.

The laser beam is delivered through an optical fiber to the cutting head, allowing efficient energy transmission.

Fiber lasers are widely used for cutting, welding and engraving metals and other materials.

TRUMPF also develops disk lasers, which are solid-state lasers but use a different active-medium design.

Mechanical Cutting vs. Laser Cutting

Laser cutting offers several advantages over mechanical machining.

Because it is a non-contact process, it does not apply mechanical cutting forces to the workpiece. This is particularly beneficial for thin-walled profiles and complex contours.

Laser cutting also enables accurate holes, cutouts and shapes without changing mechanical cutting tools.

However, laser cutting creates a heat-affected zone, while mechanical machining involves different thermal and mechanical effects.

Mechanical machining may be more suitable when extremely tight dimensional tolerances, specific surface finishes or three-dimensional machined surfaces are required.

The best choice therefore depends on the component and its manufacturing requirements.

Combining Manufacturing Technologies

Mechanical machining and laser cutting are not mutually exclusive.

Many modern manufacturing facilities combine these technologies according to the requirements of each project.

Laser cutting can efficiently produce the initial shape, holes and contours, while milling, turning or drilling can provide additional precision machining of functional surfaces.

This combination helps optimize manufacturing processes, reduce the number of operations and achieve the required product quality.

Looking for the Right Metal Cutting Solution?

HOSTINKOVO s.r.o. specializes in laser cutting metal tubes and profiles.

Contact our team to discuss your project requirements and explore suitable material processing options.