Everything You Need to Know About T Slot Aluminum Extrusions

Aluminum profiles with T-shaped cross-sections are called T-slot aluminum extrusions. They have multiple T-slots on the sides to allow easy attachment of various components. This gives T-slot aluminum extrusions great flexibility when building structures and can be quickly assembled and disassembled according to actual needs.

T-slot aluminum extrusions are also popular in the market due to their easy processing, high strength, light weight, and corrosion resistance. For example, aluminum profiles can be processed by cutting, drilling, milling, etc. to meet the needs of different shapes and sizes.

In order to give you an in-depth understanding of T-slot aluminum profiles, this article provides a comprehensive analysis of its main uses, standards and specifications, materials and surface treatments, manufacturing processes, applications and accessories.

The Main Functions of T Slot Aluminum Extrusion

T-slot aluminum extrusions have multiple main functions such as structural supports, connectors and sliding components, and are widely used in various industries and fields. Below we introduce these main functions respectively:

Structural Support

Because the aluminum alloy materials used in T-slot aluminum extrusions have exceptional strength and stability, these extrusions provide good structural support. They can offer dependable support for any kind of structure, including frames used in buildings or machinery support structures.

T-slot aluminum extrusions show off their versatility as a material for structural support when used to construct frames and brackets. Their design makes it simple to combine profiles of various sizes and shapes to create a wide range of intricate structures. Because of their flexibility, T-slot aluminum extrusions are used in a wide range of applications.

In addition, T-slot aluminum extrusions are also popular for their lightweight properties. T-slot aluminum extrusions can lower the total weight while maintaining structural stability because of the lightweight aluminum alloy. This is especially crucial for applications where weight is a key factor, like the aerospace sector.


T-slot aluminum extrusions can be used not only as the main body of the support structure, but also as the basis for connectors.

Multiple aluminum profiles can be easily connected by installing bolts, nuts, and other connectors in the T-slots.

This connection method is very flexible and can be assembled into structures of various shapes and sizes as needed, from simple frames to complex mechanical equipment.

In addition, this connection method also has high reliability and stability. This makes T-slot aluminum extrusions an ideal choice for construction, machine manufacturing and other fields.

Whether used to build exhibition display racks, assembly line workbenches or other engineering projects, T-slot aluminum extrusions can meet various needs.

Sliding Components

Tracks for sliding components are another common application for T-slot aluminum extrusions. Their T-shaped channel design, which offers the perfect sliding surface, is the reason behind this.

T-slot aluminum extrusions are perfect as tracks for sliding doors, drawers, or other moveable pieces because of their carefully made channels. Doors, drawers, and other parts may be moved and positioned with great stability and dependability because to its design.

T-Slot Aluminum Extrusion

Standards and Specifications of T Slot Aluminum Extrusion

High strength and stability structural materials, T-slot aluminum extrusions, are frequently employed in the industrial and construction sectors. Understanding national standards and common requirements for T-slot aluminum profiles is essential to proper selection and usage.

National Standards for T Slot Aluminum Extrusion

Chinese Standard

The National Standardization Administration Committee in China is responsible for issuing the national standard for T-slot aluminum extrusions. Among them, GB/T 6892 is the Chinese national standard for T-slot aluminum extrusions.

In order to guarantee the quality and dependability of T-slot aluminum extrusions, it specifies the requirements for their classification, marking, size, permitted deviation, surface quality, and other aspects.

European Standard

In Europe, the standards for T-slot aluminum extrusions are issued by the European Committee for Standardization. EN 755-9 is the European standard for T-slot aluminum extrusions.

It is similar to the Chinese standard and stipulates the dimensions, allowable deviations, mechanical properties and other requirements for T-slot aluminum extrusions.

American Standard

In the United States, the standard for T-slot aluminum extrusions is issued by the American Standards Institute. ASTM B221 is the American standard for T-slot aluminum extrusions.

It also stipulates the dimensions, allowable deviations, chemical composition, mechanical properties and other requirements of T-slot aluminum extrusions, which is basically consistent with other national standards.

Specifications of T Slot Aluminum Extrusion

The specifications of T-slot aluminum extrusions are usually expressed in series. Common series include 20 series, 30 series, 40 series and 45 series, etc. The specifications are as follows:

20 Series T Slot Aluminum Extrusion

The slot width is 6mm, the overall dimensions are usually 20mm × 20mm, and the slot depth is about 6mm.

Series 20 T-slot aluminum extrusions are suitable for small structures and light load applications. Due to the narrow slot width, this profile is usually used in situations where a lightweight and compact structure is required, such as light machinery and equipment, display racks, model making, etc.

The limitation of groove width also makes the load-bearing capacity of 20 series profiles relatively low, so it is not suitable for carrying large heavy objects or occasions requiring high strength.

30 Series T Slot Aluminum Extrusion

The slot width is 8mm, the overall dimensions are usually 30mm × 30mm, and the slot depth is about 8mm.

30 series T-slot aluminum extrusions are one of the most commonly used specifications and are suitable for general industrial and construction applications.

The groove width is moderate, which not only has certain rigidity and load-bearing capacity, but also meets the needs of general applications.

30 series profiles are commonly used in the structural construction of various mechanical equipment, workbenches, conveyor lines, etc., and are widely used in factories and workshops.

40 Series T Slot Aluminum Extrusion

The slot width is 8mm, the overall dimensions are usually 40mm × 40mm, and the slot depth is about 8mm.

40 series T-slot aluminum extrusions have high rigidity and load-bearing capacity and are suitable for large structures and heavy-load applications.

Compared with the 30 series, the 40 series profiles have the same groove width, but due to the larger overall size of the profiles, they can withstand greater force and weight.

Therefore, 40 series profiles are often used in structures that require higher strength and rigidity, such as the bases of mechanical equipment and large frames in factory workshops.

45 Series T Slot Aluminum Extrusion

The slot width is 10mm, the overall dimensions are usually 45mm × 45mm, and the slot depth is about 10mm.

45 series T-slot aluminum extrusions have higher load-bearing capacity and are suitable for applications requiring higher strength and rigidity.

Compared with the 40 series, the 45 series profiles have a wider groove width, can withstand greater force and weight, and are suitable for heavier structures and equipment.

45 series profiles are often used in large machinery equipment, heavy industrial facilities and other occasions that need to withstand high loads.

The specification selection of T-slot aluminum extrusions should be based on specific use requirements and load conditions to ensure the stability and safety of the structure.

Standards and Specifications of T Slot Aluminum Extrusion

Materials and Surface Treatment of T Slot Aluminum Extrusion

T-slot aluminum extrusions are a commonly used structural material with the advantages of being lightweight, corrosion-resistant, and easy to process.

They are widely used in industry and construction. The material and surface treatment have a significant impact on their performance and use.

Types of Aluminum Alloy

T-slot aluminum extrusions are usually made of aluminum alloys, because aluminum alloys have good strength and corrosion resistance, while lightweight, suitable for use in a variety of structures.

Common aluminum alloy types include 6061 aluminum alloy, 6063 aluminum alloy and 6082 aluminum alloy. Below we introduce these three aluminum alloys respectively:

6061 Aluminum Alloy

6061 aluminum alloy is a commonly used aluminum alloy with good strength, weldability and corrosion resistance.

Compared to other aluminum alloys, 6061 alloy is stronger but still maintains high machinability and is easy to form and process. This makes 6061 aluminum alloy widely used in various industrial fields (such as aerospace, automobiles, bicycles, ships, construction engineering, etc.).

In addition to strength and workability, 6061 aluminum alloy also offers excellent corrosion resistance. It can be used in a variety of environments, including seawater and chemical environments, without being severely affected. This makes 6061 aluminum alloy particularly popular in applications requiring corrosion resistance.

6063 Aluminum Alloy

6063 aluminum alloy has good surface treatment properties and corrosion resistance, and is often used in highly decorative applications.

It has good plasticity and weldability, and is easy to process and shape. 6063 aluminum alloy also has high hardness and strength and is suitable for occasions requiring higher strength and decoration.

6063 aluminum alloy is commonly used in building doors and windows, curtain walls, exhibition displays, furniture and other fields. It can also be surface treated through anodizing, spraying and other methods to increase its weather resistance and aesthetics.

6082 Aluminum Alloy

6082 aluminum alloy has high strength and hardness and is suitable for structures requiring higher load-bearing capacity. It also has excellent corrosion resistance and is suitable for use in a variety of environments.

6082 aluminum alloy is often used in fields such as the base of mechanical equipment, industrial structures, aviation industry, etc. that require high strength and wear resistance.

Through heat treatment, the strength and hardness of 6082 aluminum alloy can be further improved, making it suitable for more demanding engineering applications.

Surface Treatment

The surface treatment of T-slot aluminum extrusions usually includes anodizing, spraying, PVDF coating, etc. The main purpose is to increase their surface hardness, corrosion resistance and decoration. Below we will introduce three surface treatment methods:


Aluminum profiles can be anodized, an electrochemical process that creates an oxide layer on their surface. The aluminum profile’s surface is oxidized to create a dense oxide coating by energizing it as an anode in the oxidizing solution.

Strong insulating performance, high surface hardness, good wear resistance, and specific anti-corrosion qualities characterize the anodized aluminum profile.


Spraying is the process of evenly applying paint on the surface of aluminum profiles through a spray gun. Paint can be in liquid or powder form and cures to form a protective layer.

Spraying can achieve various colors and effects, and has better decorative and protective properties, but its durability is slightly inferior to anodizing and PVDF coatings.

PVDF Coating

PVDF coating is a layer of coating formed by spraying PVDF resin coating evenly on the surface of aluminum profiles and baking and curing it.

PVDF coating has excellent weather resistance, chemical resistance and abrasion resistance, can maintain color and gloss for a long time, and has strong corrosion resistance.

Manufacturing Process of T Slot Aluminum Extrusion

The manufacturing process of T-slot aluminum extrusions mainly includes steps such as extrusion, cutting, drilling, and milling. Below, we will introduce these processes one by one:


Extrusion is the most common process for manufacturing T-slot aluminum profiles. First, select a suitable aluminum alloy billet (including 6061 aluminum alloy, 6063 aluminum alloy, 6082 aluminum alloy, etc.), heat it to a certain temperature, and then feed it into the die of the extruder.

After that, under a specific amount of pressure, the die extrudes the aluminum billet into a profile with a T-shaped cross-section.

The extruded aluminum profile is cooled and stretched to achieve the required size and hardness. During the cooling process, the aluminum profile gradually cools and solidifies, while stretching can further improve its mechanical properties.


The extruded aluminum profiles need to be cut according to actual needs. The cutting can be performed using a saw or cutting machine.

Saw machines have simple cutting operations and are suitable for small-volume production and individual processing needs while cutting machines have fast cutting speeds and are suitable for mass production and efficient processing.

According to different requirements and sizes, aluminum profiles can be cut to the required length or angle as needed for subsequent processing and assembly.


Drilling holes in the aluminum profiles is typically required when producing T-slot aluminum extrusions.

Drilling can be done using a drill press or a drill bit. When drilling, the location, diameter and depth of the hole need to be determined according to the design requirements. The accuracy of these parameters directly affects the subsequent use of aluminum profiles.

After the drilling is completed, the drilling needs to be inspected to ensure that its size and position meet the design requirements.


Milling is a process performed to process special shapes or sizes of T-slot aluminum extrusions.

Milling is usually performed using a milling machine or milling cutter to cut and remove part of the material from the surface of the aluminum to achieve the shape and size required by the design.

Milling can realize the processing of complex shapes, such as precise processing of T-shaped grooves, surface leveling, etc., and is one of the important processes for manufacturing high-precision aluminum profiles.

Through the above process steps, T-slot aluminum profiles with certain strength and precision can be manufactured for use in various structural and assembly applications.

Manufacturing Process of T Slot Aluminum Extrusion

Accessories for T Slot Aluminum Extrusion

T-slot aluminum extrusions are a widely used structural profile that need accessories in a variety of applications to achieve different connection, fixation, and support requirements.

Below, we will introduce common T-slot aluminum profile accessories and how to correctly install various accessories.

Types of Accessories

There are many different and abundant T-slot aluminum profile accessories available, such as T-nuts, angle connectors, balancing weights, end caps, connecting plates, sliders, angle irons, handles, and so on.

These accessories play an important role in structural assembly and functional realization. They provide a variety of possibilities for the application of T-slot aluminum profiles.

Moreover, these accessories can be selected and combined according to specific application needs to achieve different functions and requirements.

For instance, you can construct a sturdy frame structure by selecting the appropriate corner connectors and connecting plates, and you can make the components simple to move and work with by selecting the appropriate sliders and handles.

Therefore, a reasonable combination of accessories can give full play to the advantages and functions of T-slot aluminum extrusions and meet various complex engineering and assembly needs.

How to Correctly Install Various Accessories

The installation method of T-slot aluminum profile accessories mainly includes three steps: insertion, alignment, and fixation.

First, select appropriate accessories (T-nuts, corner joints, angle connectors, etc.) and installation tools (wrenches, screwdrivers, fixing glue, adjustment washers, etc.) as needed. This is a prerequisite for correct installation.

Second, insert the chosen accessory into the notch or port of the T-slot. It should be noted that the accessories should be aligned with the T-slot aluminum profile. You can use auxiliary tools, such as adjusting washers, to adjust the position of the accessories.

Lastly, to make sure it is dependable and secure, employ fastening accessories like bolts, screws, or glue. To ensure the fixing effect and safety, the choice of fixing accessories should be made based on the accessories’ features as well as the use environment.

After installation, it is best to check the structure again to ensure that the accessories are firmly installed to avoid safety hazards caused by looseness or instability. Properly installed accessories can improve the stability and safety of the structure.


In short, T-slot aluminum extrusions, as a multi-functional material, have a wide range of applications in various fields.

They not only have excellent mechanical properties and corrosion resistance, but also have good processing performance and assembly performance, which can meet the needs of different industries.

Through the introduction of this article, you can have a more comprehensive understanding of the characteristics and advantages of T-slot aluminum extrusions.

When selecting T-slot aluminum extrusions, factors such as their standards and specifications, materials and surface treatments need to be taken into consideration to ensure that the needs of the project are met.

With the continuous development of technology and the expansion of application fields, T-slot aluminum extrusions will have broader development space. They will play an increasingly important role in future development, bringing more convenience and innovation to all walks of life.

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