What Is A Trunnion On A Table Saw? 

What Is A Trunnion On A Table Saw?

[Know Before Using]

In the realm of woodworking, the table saw stands as the centerpiece of precision and productivity. Its remarkable ability to slice through wood with accuracy and finesse is made possible by a multitude of intricate components working in harmony. Among these components, one that stands out in its critical role is the trunnion. But what is a trunnion on a table saw and why is it indispensable to the world of woodworking?

A trunnion is a critical mechanical component found in a table saw, responsible for supporting and controlling the arbor and blade assembly. Acting as a pivotal point, the trunnion ensures stability and precise movement during cutting operations. 

It is often located beneath the table surface, securely holding the arbor carriage and allowing for adjustments that impact the blade’s positioning and angle.

In this exploration of the trunnion on a table saw, I will unravel the secrets of its design, functions, and how it elevates woodworking to new heights of precision and craftsmanship. 

General Overview Of Trunnion On A Table Saw:

A trunnion is a crucial component found in table saws that plays a vital role in the machine’s functionality and precision. It is essentially the mechanism responsible for supporting and controlling the arbor and blade assembly. Understanding the trunnion and its functions is essential for any table saw operator or woodworking enthusiast.

The primary function of a trunnion is to provide stability and control for the arbor and blade. It acts as a pivot point, allowing the blade to tilt for bevel cuts and adjust for various cutting angles. This adjustability is vital for achieving accurate and precise cuts in woodworking projects.

The trunnion typically consists of several key components, including a trunnion bracket, arbor carriage, and trunnion bolts. The trunnion bracket attaches to the saw’s table and houses the arbor carriage, which holds the arbor assembly and blade. The trunnion bolts secure the trunnion assembly to the table saw’s frame.

To ensure optimal performance, it is important to make necessary adjustments to the trunnion. This includes aligning the blade parallel to the miter slots, checking and adjusting the blade tilt mechanism, and ensuring smooth operation through proper lubrication.

A high-quality trunnion is crucial for accurate and reliable cutting results. A sturdy and well-designed trunnion provides stability, minimizes vibrations, and allows for precise adjustments, resulting in cleaner cuts and improved overall performance.

When choosing a table saw, it is advisable to consider the quality and design of the trunnion. A robust and well-built trunnion system contributes to the overall durability and longevity of the machine.

Purposes Of Using Trunnion On A Table Saw:

The trunnion’s functionality contributes to the overall performance and versatility of the table saw, making it an essential component for woodworkers of all skill levels. It serves several important purposes when used on a table saw. These include:

  • Support And Stability:

One of the primary purposes of a trunnion is to provide support and stability to the arbor and blade assembly. It acts as a pivot point, holding the arbor carriage securely in place and ensuring that the blade remains stable during operation. This stability is crucial for achieving accurate and clean cuts in woodworking projects.

  • Blade Tilt And Angle Adjustments:

The trunnion enables the blade to tilt, allowing for bevel cuts at different angles. By adjusting the trunnion, woodworkers can achieve precise angled cuts, be it for creating chamfers, mitered edges, or complex bevel profiles. The trunnion’s ability to control the blade tilt provides versatility and expands the range of woodworking possibilities.

  • Safety And Control:

A well-designed trunnion system enhances the safety and control of the table saw. It ensures that the blade remains in the desired position, preventing accidental movements or misalignments during operation. This stability and control contribute to the overall safety of the user and reduce the risk of kickbacks or other accidents.

  • Precision And Accuracy:

The trunnion’s ability to maintain blade alignment and stability directly impacts the precision and accuracy of the cuts. A properly adjusted and robust trunnion ensures that the blade remains parallel to the miter slots and allows for micro-adjustments to achieve the desired cutting results. This precision is especially important when working on intricate woodworking projects or when aiming for seamless joinery.

  • Ease Of Blade Changes:

The trunnion system often incorporates quick-release mechanisms or blade change features. This allows woodworkers to easily and efficiently change the saw blade when necessary, saving time and effort during project transitions.

  • Vibration Dampening:

A well-designed trunnion can help dampen vibrations generated during operation. This reduces the overall noise level and creates a smoother cutting experience, resulting in cleaner and more precise cuts.

  • Compatibility With Accessories:

Trunnion systems are typically designed to be compatible with various table saw accessories and attachments. These can include dado blade sets, auxiliary fences, sleds, and other enhancements that expand the functionality and versatility of the table saw.

  • Maintenance And Adjustment:

Trunnions often feature adjustable components that allow for fine-tuning and maintenance. This includes blade alignment adjustments, lubrication points, and other mechanisms that help optimize the performance of the table saw and extend its lifespan.

  • Industry Standard:

Trunnions have become an industry standard feature in table saws due to their importance in achieving accurate and safe cutting results. Many professional woodworkers and hobbyists prefer table saws equipped with a trunnion for their reliability, precision, and wide range of capabilities.

Related Questions:

How Do You Adjust A Table Saw Trunnion?

To adjust a table saw trunnion, start by aligning the blade parallel to the miter slots or fence. Loosen the trunnion bolts that secure the assembly to the saw’s frame, and use a square or alignment tool to check the blade’s alignment. Adjust the trunnion by turning the adjustment screws or knobs until the blade is parallel.

For bevel cuts, consult the manufacturer’s instructions to locate the bevel angle adjustment points on the trunnion. Set the desired angle using a bevel gauge and make adjustments accordingly. Lock the trunnion in place once the desired adjustments are achieved.

How Does A Trunnion Function In A Table Saw To Ensure Accurate And Precise Cuts?

The trunnion’s function in a table saw is multi-fold when it comes to ensuring accurate and precise cuts. Firstly, it provides stability by securely holding the arbor and blade assembly in place, preventing unwanted movements during operation. This stability minimizes vibrations, reducing the risk of inaccurate cuts and promoting cleaner edges.

Moreover, the trunnion allows for blade tilt adjustments, enabling bevel cuts at various angles. This adjustability provides versatility and precision when working on angled cuts or creating intricate joinery. Moreover, the trunnion allows for fine adjustments to align the blade parallel to the miter slots or fence, ensuring square cuts and maintaining consistent dimensions. 

What Is The Role Of A Trunnion On A Table Saw In Allowing Bevel Cuts And Adjusting Cutting Angles?

When making bevel cuts, the trunnion allows the blade to tilt to the desired angle, such as 45 degrees or any other specified angle. This adjustability is essential for creating angled cuts, beveled edges, or mitered joints in woodworking projects. The precise and controlled adjustment of the trunnion ensures accurate and consistent cutting angles, resulting in clean and precise bevel cuts.

Woodworkers can make adjustments to the trunnion by using the bevel adjustment mechanisms provided on the table saw. These mechanisms allow for fine-tuning the bevel angle to achieve the desired cutting result. By offering this adjustability, the trunnion enhances the versatility and flexibility of the table saw, enabling woodworkers to tackle a wide range of projects with different cutting angles and bevel requirements.


A trunnion is a fundamental component of a table saw that plays a vital role in ensuring stability, precision, and versatility in woodworking. It provides support and control for the arbor and blade assembly, allowing for accurate cuts and bevel adjustments. 

The trunnion’s ability to maintain alignment, facilitate bevel cuts, and offer fine adjustments enhances the overall performance and capabilities of the table saw, contributing to successful woodworking projects. Hopefully, you now know what a Trunnion is on a table saw.

Md Meraj

This is Meraj. I’m the main publisher of this blog. Wood Working Advisor is a blog where I share wood working tips and tricks, reviews, and guides. Stay tuned to get more helpful articles!

Recent Posts