What Is the Best Angle Grinder?

Published: May 26, 2020/Last Updated September 19, 2024

Table of Contents

Angle grinders are indispensable tools in metalworking, valued for their versatility in cutting, grinding, polishing, and more.

However, selecting the right angle grinder can be daunting due to the variety of models and features available.

This guide aims to simplify your decision-making process by combining insights from leading reviews and focusing on the key factors that should influence your choice.

Let’s get straight to the point

Choosing the right angle grinder involves considering key factors like disc size, power source, speed, wattage, safety features, and ergonomics.

Larger discs and corded grinders suit heavy-duty tasks, while smaller discs and cordless options offer precision and flexibility.

Safety features like handguards and slow start are crucial for user protection. Ergonomic design enhances comfort during prolonged use.

This guide reviews top models, highlighting the best overall (DEWALT DWE402) and best value (BLACK+DECKER BDEG400) options, helping you pick the perfect tool for your needs.

cutting using grinder

What are the Essential Features of Angle Grinders?

Disc Size

The disc size of an angle grinder is a critical factor in determining its power and the scope of tasks it can handle.

Larger discs usually signify a more powerful tool, making them suitable for heavy-duty tasks such as cutting thick metal.

These larger discs also effectively handle tasks requiring significant material removal over large areas. However, they can be unwieldy in confined spaces or when precision is required.

On the other hand, smaller discs offer greater precision and are ideal for jobs that require fine detail or involve tight, hard-to-reach areas.

The most common disc sizes range from 4.5 inches to 9 inches, with 4.5 inches being the most popular for general use due to its balance between power and control.

When selecting a grinder, consider the projects you’ll be undertaking and choose a disc size that aligns with those needs.

Power Source

Angle grinders are powered by either electricity, batteries, or compressed air, each with advantages and drawbacks.

Corded Grinders: These are preferred for tasks that require consistent power over an extended period. The main advantage of corded grinders is their ability to operate without interruption as long as they remain plugged into an electrical outlet. They are typically more powerful than their cordless counterparts, making them ideal for heavy-duty applications. However, the cord can restrict mobility, especially in large workspaces or when working in tight areas.
Cordless Grinders: Powered by rechargeable batteries, cordless grinders offer unmatched mobility and convenience, making them ideal for tasks where flexibility is paramount. The trade-off is that they are limited by battery life, which can interrupt work if the battery runs out. Advances in battery technology have improved cordless grinders’ performance, but they still need to catch up to corded models in terms of sustained power output.
Air-Powered Grinders: These are less common but are highly effective in industrial settings where pneumatic power is readily available. They offer high torque and are typically more lightweight than electric grinders, making them easier to handle for prolonged periods. However, they require a constant supply of compressed air, which can limit their portability and convenience.

Speed and Wattage

The speed of an angle grinder, measured in revolutions per minute (RPM), is a crucial factor in its performance.

Higher RPMs allow the grinder to work more quickly, making them ideal for tasks requiring fast material removal.

However, high speeds can be challenging to control, especially for beginners, and can lead to mistakes such as over-grinding.

For more flexibility, consider a grinder with variable speed control. This feature allows you to adjust the speed according to the specific task, providing greater control and precision.

Variable-speed grinders are especially useful for tasks that require a delicate touch, such as polishing or working on softer materials.

Wattage is another important consideration, as it indicates the power of the grinder’s motor.

Generally, a higher wattage means a more powerful motor capable of handling tougher jobs and working more efficiently under load.

However, more powerful motors can also be heavier and more expensive. Matching the wattage to your specific needs is essential to ensure you get the right balance between power and ease of use.

Safety Features

Safety should always be a top priority when using any power tool, and angle grinders are no exception.

Several safety features are designed to protect users and make the tool easier to handle:

Handguards: These shields protect your hands from sparks, debris, and accidental contact with the grinding disc. Adjustable handguards are particularly useful as they can be positioned to provide the best protection for different tasks.
Slow Start: This feature gradually ramps up the grinder’s speed when turned on, reducing the risk of the tool jerking out of your hand. A slow start is particularly beneficial for beginners or when working with high-power grinders.
Automatic Safety Clutch: This feature prevents kickback, which can occur when the grinder disc suddenly binds in the material. Kickback can be dangerous, potentially causing the tool to jerk violently. An automatic safety clutch helps mitigate this risk, making the grinder safer.

Ergonomics and Design

The design and ergonomics of an angle grinder can significantly impact your comfort and efficiency during use.

An ergonomic design ensures the tool fits comfortably in your hand, reducing strain and fatigue during extended use. Key ergonomic features to look for include:

Handle Design: Look for grinders with rubberised, vibration-dampening handles that reduce the strain on your hands and arms. Some models offer additional handle positions, allowing you to adjust the grip for different tasks.
Weight: The weight of the grinder is also important. Heavier grinders can be more challenging to handle, especially in awkward positions or during extended use. However, they often provide more stability and control for heavy-duty tasks. Lighter models are easier to maneuver but may require more effort to keep steady during use.
Dust Sealing: Angle grinders generate a significant amount of dust, which can damage the tool’s internal components over time. A dust-sealed design helps protect the motor and other critical parts from dust ingress, extending the lifespan of the grinder and ensuring consistent performance.

the dangers of angle grinders 2

Top Angle Grinders: In-Depth Reviews

DEWALT DWE402 4.5″ Angle Grinder – Best Overall

The DEWALT DWE402 is ideal for both professionals and DIY users. It features an 11-amp motor for high-performance tasks.

Its compact design allows access to tight spaces, and the dust ejection system protects the motor, enhancing durability.

The rotatable handguard ensures safety by shielding it from sparks and debris.

Although it’s pricier and powerful for beginners, its robust build and advanced features justify the cost.

Makita 9557PBX1 4.5″ Angle Grinder

With its 4.5-inch disc, the Makita 9557PBX1 offers a balance of performance and affordability, suitable for high-volume tasks like metal cutting.

Its labyrinth seal design protects internal components from dust, extending the tool’s lifespan. The lock-on switch allows continuous operation, reducing hand fatigue.

However, its heavier weight might make it uncomfortable for prolonged use, but it’s still a reliable choice for those needing a durable grinder.

Bosch 18V Angle Grinder

The Bosch 18V Angle Grinder is designed for professionals, offering durability and reliable performance.

Its lightweight design and low-vibration handle ensure comfort during extended use, improving control for precise results.

Despite its higher cost, this premium tool is ideal for continuous, demanding tasks, though there may be better choices for casual users due to its price.

BLACK+DECKER BDEG400 Angle Grinder – Best Value

The BLACK+DECKER BDEG400 is a budget-friendly grinder ideal for small to medium tasks. Its three-position adjustable side handle offers better control and comfort in various angles and tight spaces.

While it provides good value, its limited power output makes it less suitable for heavy-duty tasks, with potential motor overheating under prolonged, challenging conditions.

Metabo WP9-115 8.5 Amp Angle Grinder

The Metabo WP9-115 is a compact, high-speed grinder known for efficiency and ease of use.

It can reach speeds of 10,500 RPM for quick material removal. Its quick disc change mechanism and dead man function enhance convenience and safety.

Though the power button may be hard to hold during long use, its safety features and reliability make it a top choice.

Avid Power 7.5 Amp Angle Grinder

The Avid Power 7.5 Amp Angle Grinder is a budget-friendly tool for light-duty tasks. Its compact and lightweight design makes it easy to handle, especially for users who struggle with heavier grinders.

With speeds up to 11,000 RPM, it’s ideal for quick tasks, though prolonged use may lead to motor overheating and discomfort. It is best for occasional use and small projects.

Makita 9564CV Angle Grinder

The Makita 9564CV excels in efficiency and adaptability with its variable speed control, which is adjustable between 2,800 to 10,500 RPM and is suitable for diverse applications.

The labyrinth seals protect the internal components, ensuring durability in harsh environments.

Its ergonomic handle and lightweight design prioritise user comfort, making it easy to control even during extended use.