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Best 9-Inch Angle Grinder Review

Best 9-Inch Angle Grinder Review

If you’ve found yourself on this page, you probably know that a 9 inch (230 mm) is the right type of angle grinder for you and you just want that bit more information to decide which one is best. Luckily for you, Our experts have put all of the best 9-inch angle grinders to the test, and written our honest reviews to help you make the right decison!

Our Top Pick

Makita GA9020S

Honourable Mention

DeWalt DWE490

Best Value

Makita M9001

At Wonkee Donkee, we are power tool experts and we have no intention of wasting your time, so let’s jump straight into the reviews. We’ve handpicked our two favourites and it wasn’t easy. So we must admit that the first and second pick has very little between them. Makita for us just steals the title of the best 9-inch angle grinder with their GA9020S Angle Grinder, closely followed by the DeWalt DWE490 model.


The third model we have included in this review is a slightly more affordable 9-inch angle grinder in the Makita M9001. A member of Makita’s MT Series, the professional output of this power tool comes without the professional price tag, making it our top rank for value for money.

Makita GA9020S Angle Grinder

The Makita GA9020S Angle Grinder was a worthy winner of our coveted best 9-inch angle grinder in our Wonkee Donkee review. It is simply a great all-round tool and is 100% worthy of your consideration. To begin, Makita has fitted this angle grinder with a more powerful 2000 watt motor, which has been well designed to protect itself from dust particles.


Add to that the amazing practicality of being able to choose between operating it at 110 or 240 volts and in 3 different handle position placements, the ergonomic design makes for outstanding usability.


Not shy on power, the Makita GA9020S angle grinder spins at up to 6,600 revolutions per minute and can be worked hard before beginning to overheat. The raw speed that this disk generates helps with performance and makes this is one of the best angle grinders for welders, fabricators and stonemasons.


Our Rating

Key Features:

DeWalt DWE490 230mm Angle Grinder

If we are honest, the DeWalt DWE490 230mm Angle Grinder was really unlucky not to take the top spot in our best 9-inch angle grinder review. Capable of a powerful 2000 watt output from an input of 240 volts, this power tool is more than capable of taking on tough tasks and working for long periods of time without the need for continuous resting.


Intelligently designed, the motor is surrounded by ventilated gear casing; which creates a cooling airflow to prevent overheating, with an epoxy coat that protects the motor from abrasion and dust. It’s also extremely user friendly, with an ergonomic design that allows you to hold the DeWalt DWE490 in two different comfortable positions, easy to switch between.


Packed with great safety features like the no-volt lock-off switch which prevents dangerous restarts if the power cuts out. The incredible features keep coming with a brush window that allows you to replace the brush quickly and a spindle lock for safe wheel changes. Overall, the design of this DeWalt angle grinder is really a thing of beauty.


Our Rating

Key Features:

Makita M9001 230mm Angle Grinder

A dark horse in our best 9 inch angle grinder review, the Makita M9001 is an incredibly powerful tool. Part of Makita’s MT Series, which boasts professional-level performance without the price tag, the 2000 watt motor has the capability of up to 6,600 rotations per minute for impressively fast grinding.


Packed with intelligent features such as the spiral bevel gears that allow for smoother more energy-efficient rotations, and a shaft lock that makes wheel changes quick and easy, Makita’s innovative design capabilities are unrivalled.


User-friendly, its ergonomic style includes anti-slip handles with an adjustable side grip that allows it to be operated in 3 different positions with an increased level of comfort when you are using it for extended periods. Completed with a strong wheel safety cover to protect the operator in case of accidental disintegration of the wheel or material, Makita has really considered everything. A strong outside contender at a slightly cheaper price, don’t underestimate the Makita M9001 Angle Grinder.


Our Rating

Key Features:

9-inch Angle Grinder Buyers Guide

We always like to include buyers guides with our reviews, but with this 9-inch angle grinder review, we wanted to do something different. We have found that a large percentage of the users who have visited our 9-inch angle grinder reviews know how to use these grinders. The reason they ended up at our review is that they were unsure as to which size grinder to buy. So at Wonkee Donkee, we thought we’d write an angle grinder size guide instead. If you are after a full angle grinder buying guide then visit the bottom of our best angle grinder review.

What Size Angle Grinder Should I buy?

There are a couple of critical factors to consider when trying to determine which size angle grinder is the best for you. But before we go through those, the most important factor is to understand what we mean when we refer to the size of an angle grinder.


The tool itself has very little bearing on the specification of size. It can be compact or large, the size description given in angle grinder product information refers to the disc size. There is a range of different disc sizes that you can get that roughly vary from 4 to 13 inches.


The reason why the size of the disc is important is that it determines how well the angle grinder handles the task at hand. You can cut through piping, concrete and the like with the most common (and most popular) 4.5-inch grinders. However, if you are trying to cut materials with a higher thickness than an average plank of wood, the 4.5-inch models will more than likely struggle. Whereas a 9-inch angle grinder is built for these tasks and would cut through material that size easily enough, but would find cutting through a wooden beam tough going. It’s all really dependent on why and what you need an angle grinder for. The basic rule that is: the bigger the wheel, the deeper it can make cuts.


Most of the time, you will be using an angle grinder to tidy up welds, cut through concrete, cut metal rods, grinding down objects or polishing. A 4.5-inch angle grinder will be more than enough to complete these tasks and will do a great job too. They’ll also typically be cordless, which means you can have more freedom to use wherever you like as well as in a range of different angles.


However, if you’re working with a lot of welding, larger materials or industrially, you will want something that gets through more heavy-duty work without starting to overheat. That’s where your 9-inch angle grinder comes in. They are real workhorses.


When it comes to speed the size of the wheel matters again. The smaller the wheel, generally the faster it rotates with speeds reaching around 8000 RPM. This makes it great at polishing, but that additional speed can translate into more friction and therefore it’s likely to overheat quicker. So tasks may take longer as you give time for the tool to cool down in between uses.


So the answer is, that there is no definitive answer. As with 90% of power tools, the best one for you is completely dependant on what you intend to do with it and your budget. For everyday usage, you’ll do well with a 4.5-inch angle grinder. But if you know you’ll be grinding a lot of metal or working on larger projects, then you’re on the right page. Take the 9-inch grinder.

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