Makita GA5090 Angle Grinder Review

Introducing the Makita GA5090 5″ SJS™II High-Power Angle Grinder! With a powerful 15 AMP motor delivering a wide range of RPM, this high-performance tool is designed for reduced vibration, increased operator comfort, and superior control. Equipped with features like vibration absorbing side handle, electronic controller for constant speed control, and soft start for smooth start-ups, the Makita GA5090 is the perfect tool for your grinding needs. Have you been on the lookout for a reliable and efficient angle grinder to add to your toolkit? Look no further than the Makita GA5090 5″ SJS™II High-Power Angle Grinder. With its powerful 15 AMP motor and innovative features like SJSII technology and electronic controller, this angle grinder is designed to make your tasks easier and more comfortable. Let’s dive into a detailed review of this versatile tool to see why it might be the perfect addition to your workshop.

Makita GA5090 5 SJS™II High-Power Angle Grinder

Check out the Makita GA5090 5 SJS™II High-Power Angle Grinder here.

Power and Performance

If you’re looking for a workhorse tool that can handle a variety of grinding and cutting tasks, the Makita GA5090 has you covered. The powerful 15 AMP motor delivers more output and variable speeds ranging from 2,800 to 11,500 RPM. Whether you’re working on metal, masonry, or other materials, this angle grinder can get the job done quickly and efficiently.

High-Power Motor

The 15 AMP motor in the Makita GA5090 provides the torque and speed needed to tackle tough grinding and cutting tasks with ease. From removing rust and paint to cutting through rebar, this angle grinder is up to the challenge. You’ll appreciate the consistent power delivery and performance, no matter the job at hand.

Variable Speeds

With a range of 2,800 to 11,500 RPM, you can easily adjust the speed of the Makita GA5090 to suit the task at hand. Lower speeds are ideal for delicate tasks that require precision, while higher speeds are perfect for quickly removing material. This versatility makes the angle grinder suitable for a wide range of applications.

SJSII Technology

One standout feature of the Makita GA5090 is its SJSII technology, which provides a leaf spring and cam gear drive mechanism designed to reduce vibration. This reduces operator fatigue and discomfort during extended use, allowing you to work more efficiently and comfortably. Say goodbye to hand fatigue and hello to smooth, controlled operation.

Comfort and Control

In addition to its impressive power and performance, the Makita GA5090 also prioritizes comfort and control for the user. From vibration-absorbing side handles to electronic speed control, this angle grinder is designed with the user in mind.

Vibration-Absorbing Side Handle

The vibration-absorbing side handle on the Makita GA5090 provides increased comfort during operation, reducing strain on your hands and arms. This feature is particularly beneficial during long periods of use, ensuring that you can work comfortably without sacrificing control. Say goodbye to the discomfort of traditional angle grinders and hello to a more ergonomic experience.

Electronic Speed Control

The electronic controller on the Makita GA5090 provides constant speed control, automatically applying additional power to the motor to maintain speed under load. This feature ensures consistent performance and cutting power, regardless of the material you’re working with. You’ll appreciate the smooth and controlled operation of this angle grinder, even under heavy loads.

Soft Start

The soft start feature on the Makita GA5090 is designed to suppress start-up reaction for smooth and controlled operation. This not only improves user safety but also extends the life of the gears in the angle grinder. You’ll appreciate the reliability and longevity of this tool, thanks to the thoughtful design considerations like soft start.

Makita GA5090 5 SJS™II High-Power Angle Grinder

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Durability and Construction

When investing in a new tool, durability is key. The Makita GA5090 is built to withstand the rigors of regular use, with high-quality materials and construction that ensure longevity and reliability.

Robust Construction

From the motor housing to the gear assembly, every component of the Makita GA5090 is built to last. The durable construction ensures that this angle grinder can handle tough jobs day in and day out, without compromising on performance. You can trust that this tool will stand up to the demands of your work environment.

Quality Materials

Makita is known for its commitment to quality, and the GA5090 is no exception. The components and materials used in the construction of this angle grinder are designed to meet the highest standards, ensuring that you get a reliable and durable tool that will last for years to come. When you choose Makita, you’re investing in quality craftsmanship.

User-Friendly Design

While power and performance are essential in an angle grinder, user-friendliness is also crucial. The Makita GA5090 is designed with intuitive features and thoughtful design elements that make it easy to use, even for beginners.

Ergonomic Design

From the shape of the handle to the placement of the controls, every aspect of the Makita GA5090 is designed with user comfort in mind. The ergonomic design ensures that you can work for extended periods without discomfort or fatigue, allowing you to focus on the task at hand. Whether you’re a seasoned pro or a novice, you’ll appreciate the user-friendly design of this angle grinder.

Tool-Free Guard Adjustment

One convenient feature of the Makita GA5090 is its tool-free guard adjustment, which allows you to quickly and easily change the position of the guard to suit the task at hand. Whether you’re cutting, grinding, or polishing, adjusting the guard is a breeze, saving you time and effort. This simple yet effective design feature enhances the overall usability of the angle grinder.

Spindle Lock

Changing accessories on the Makita GA5090 is a simple and straightforward process, thanks to the spindle lock feature. With the press of a button, you can lock the spindle in place, making it easy to swap out discs and accessories without any hassle. This practical design element ensures that you can work efficiently and safely, without any unnecessary complications.

Makita GA5090 5 SJS™II High-Power Angle Grinder

Discover more about the Makita GA5090 5 SJS™II High-Power Angle Grinder.

Safety Features

When working with power tools, safety should always be a top priority. The Makita GA5090 includes a range of safety features designed to protect you during operation, giving you peace of mind while you work.

Overload Protection

The electronic controller in the Makita GA5090 includes overload protection, which helps prevent damage to the motor in case of overload or excessive stress. This feature not only extends the life of the tool but also reduces the risk of accidents and injuries. You can work confidently knowing that the angle grinder is equipped with safety mechanisms to protect you and the tool.

Zero Voltage Restart Protection

In the event of a power outage or accidental unplugging, the Makita GA5090 includes zero voltage restart protection, which prevents the tool from restarting on its own once power is restored. This feature helps prevent injuries and accidents caused by sudden restarts, giving you added peace of mind while you work. Safety is paramount when using power tools, and the GA5090 is designed with your well-being in mind.

Maintenance and Care

To ensure that your Makita GA5090 angle grinder continues to perform at its best, proper maintenance and care are essential. With regular upkeep and attention to detail, you can extend the life of your tool and maximize its performance.

Cleaning and Inspection

Regular cleaning and inspection of the Makita GA5090 are essential to prevent dust and debris from accumulating inside the tool. After each use, wipe down the exterior of the angle grinder and inspect the components for signs of wear or damage. By keeping your tool clean and well-maintained, you can ensure that it will continue to operate smoothly and efficiently.


Proper lubrication of the gears and moving parts in the Makita GA5090 is crucial to prevent friction and wear. Periodically inspect the gear assembly and apply lubricant as needed to ensure smooth operation. By maintaining proper lubrication, you can extend the life of your angle grinder and avoid premature wear and tear on the components.


When not in use, it’s important to store your Makita GA5090 angle grinder in a clean, dry, and secure location. Keep the tool out of direct sunlight and away from moisture to prevent corrosion and damage. Store the angle grinder in its case or a designated storage area to protect it from dust and debris. Proper storage is key to maintaining the performance and longevity of your tool.

Makita GA5090 5 SJS™II High-Power Angle Grinder

Final Thoughts

In conclusion, the Makita GA5090 5″ SJS™II High-Power Angle Grinder is a versatile and reliable tool that is well-suited for a wide range of grinding and cutting tasks. With its powerful motor, innovative features, and user-friendly design, this angle grinder is a valuable addition to any workshop or jobsite. Whether you’re a professional tradesperson or a dedicated DIYer, the GA5090 has everything you need to tackle your projects with confidence and precision. Invest in quality, performance, and comfort with the Makita GA5090 angle grinder.

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