Compared to larger variants, 4-inch angle grinders are a lot more popular thanks to their budget-friendlier pricing and compact, portable design. The best 4-inch angle grinders on the market today also have plenty of working power to offer. Some can handle heavy-duty grinding or cutting tasks without breaking a sweat.
In today’s review, I’ll show you a trio of angle grinders that the analysts have determined to be the best on the market. See for yourself whether any suits your fancy!
Top 3 Best 4-inch Angle Grinders 2022
| Product Image | Product Name | Our Rating | Price |
|---|---|---|---|
  | Makita GA4030K | 4.9 | See latest Price |
  | Makita GA4030 | 4.8 | See latest Price |
  | Central Pneumatic 4" Air Grinder | 4.8 | See latest Price |
In-depth 3 Top Rated 4″ Angle Grinder Reviews
1. Makita GA4030K 4” Angle Grinder – Best overall
As one of the premier manufacturers of power tools, you can count on them to give you a fair deal … and the Makita GA4030K is it. The angle grinder is priced very affordably. But don’t think that Makita cut corners to get the cheaper price. The construction quality of the GA4030K is still very good and, in terms of performance, it’s adequate for the price.
- 6.0-Amp motor, ⅝-inch arbor
The GA4030K comes with a 6-amp motor and can attain a no-load speed of 11,000 RPM. With this sort of performance, you can confidently perform low to medium-duty tasks. It’s possible for this corded angle grinder to perform heavier-duty tasks, but don’t get your hopes up.
I have seen reports of the GA4030K being put to very good use among professionals. The grinder has been used for concrete work, cutting brick and stone, performing rust removal operations, polishing metal, doing auto repair, and more.
The GA4030K is equipped with a ⅝ -inch arbor size. It accepts 4-inch cutting discs and accessories.
- Durable construction
The Makita GA4030K is highly durable. It comes with an impact-resistant plastic body that can handle a hard tumble without getting so much as a scratch. At the front, the sensitive gears are protected by a metal housing.
Makita also built into the GA4030K is a series of protective zig-zag varnish seals. They can protect the motor from being infiltrated by dirt and debris, further improving the grinder’s durability. Last but not least, the bearing has an all-ball design.
- Reliable design
One of the many highlights of the GA4030K is that it comes with machined bevel gears. The hardened design allows them to have a service life that is two times longer than older Makita angle grinders.
- Compact and portable
Like every 4-inch angle grinder on the market, the GA4030K is very compact. It has a dimension of 5.87 x 16.77 x 12.76. Compared to most grinders on the market, this model falls on the smaller side.
Plus, if you’re looking for a lightweight angle grinder, you’re in luck. The whole thing weighs about 3.5-3.7 pounds.
- Ergonomic features
Makita has done a great job at designing the GA4030K so that it is comfortable for the user to work with it for long periods. The angle grinder has a barrel grip measuring 2-¼-inch. As it is quite slim, it can fit snugly in the operator’s palm. It improves comfort as well as handling.
The side handle is positioned at a slanted 20° angle. It can also be repositioned to either side of the angle grinder’s body, depending on what your dominant hand is.
- Included tool case
A hard case is included for you to easily transport the angle grinder around. It is built tough, so you don’t have to worry when you leave it around the job site. The case is capable of protecting the tool when it takes a hard fall.
Check more: Makita 9557PBX1 Review
2. Makita GA4030 4-inch Angle Grinder – The runner up
If you need a good angle grinder that’s a bit cheaper than the GA4030K, consider the GA4030. You may have already noticed that other than the “K” suffix, they got the same exact serial number.
That is because they are, in fact, the same Makita 4-inch angle grinder. There is no difference between the GA4030 and the GA4030K. The key difference here is that the GA4030K comes with a carrying case in the box, while the GA4030 does not.
The difference may be minor, but if you don’t really need the carrying case, this one can actually save you a decent amount of money.
3. Central Pneumatic 4” Air Angle Grinder – Best price
If you’ve never heard of an air angle grinder (or pneumatic angle grinder) before, be in for a surprise. Instead of using an electric motor to spin the grinding wheel, a pneumatic grinder uses high-velocity air. So, when you use it, you have to plug it into an air compressor.
In this category, the Central Pneumatic 4-inch air angle grinder is turning out to be the most valuable option: affordable, yet has plenty of performance power to spare.
- High air-driven performance & ⅝-inch arbor size
The air-driven angle grinder can achieve a no-load speed of 10,000 RPM. It has a ⅝-inch arbor size and accepts 4-inch grinding wheels along with various accessories.
This is a very high-performance level. You can handle various heavy-duty tasks with this angle grinder fairly easily.
- Speed throttle
Air-driven angle grinders like these come with a speed throttle that you can use to adjust the speed of the grinding wheel. So, you can switch up the wheel’s speed so that it best suits what you’re doing. Feather edging? Low speed would do. You can go full speed for metalwork and other tough tasks.
- All-metal construction
If you’ve only ever used electric angle grinders before, you’re probably more familiar with the shape and feel of plastic or rubberized handle. As such, the all-metal body of the Central Pneumatic air angle grinder could feel pretty weird to use at first.
As I said earlier, the angle grinder does not use electricity at all and relies on compressed air to spin the grinding wheel. This allows Central Pneumatic to build the grinder completely from metal. You don’t have to worry about electric shock.
Of course, the metal construction means the grinder enjoys far better durability than its plastic counterpart.
- Ergonomic design
For those who haven’t ever used an all-metal tool before, looking at the Central Pneumatic grinder at a brief glance, it could look pretty uncomfortable to use. That’s really far from the truth.
Customers have been very satisfied with the level of comfort it provides so far, citing the handle’s small size and how it fits snugly into the palm.
Additionally, the side handle is slender, grippy, and can be freely adjusted.
- Metal blade guard
Surrounding the 4-inch blade is going to be the blade guard. It is adjustable and also functions as a spark deflector. The deflection rate is decent.
FAQs
1. Can you use a 4 disc on a 4.5 angle grinder?
Conventional wisdom is that you should only use the type of blade that your angle grinder is designed for. However, in reality, there shouldn’t be any problem if you want to use a smaller blade on your grinder. As long as the grinding wheel can be fitted tightly onto the spindle, there isn’t going to be a problem.
Note that 4-inch and 4 ½-inch grinding wheels have different arbor sizes. Make sure that you use the correct adapter.
2. Which is better: 4-inch or 5-inch angle grinder?
Due to its smaller size, a 4-inch angle grinder is never going to have the same performance level as a 5-inch grinder.
If you’re looking for maximum performance power, a 5-inch angle grinder is generally best. Compared to a 4-inch model, the 5-inch has a greater cut depth, has better torque, has a higher spin-rate, and just better efficiency in general.
But if you’re looking for something that’s affordable or portable, the 4-inch is a lot better. Despite the lower performance, these angle grinders are usually cheaper, more compact, and have lighter weight.
3. Can I use a bigger disc on an angle grinder?
Unlike using a smaller disc on your angle grinder, putting a larger disc isn’t recommended. The motor of your grinder was built with a specific mechanical resistance value in mind. When you put a larger disc in, it could mean overheating and burning out the motor.
Additionally, using a larger wheel could mean removing the blade guard. This is extremely unsafe.
4. What is the largest size angle grinder?
On the market, a 9-inch angle grinder is the largest that you can buy. You can buy these from a variety of brands, from Makita to DeWalt and Bosch.
5. What is the difference between a cutting disc and a grinding disc?
A cutting disc is usually thinner and is used exclusively for cutting objects (cutting metal pipes, for example). Meanwhile, a grinding disc is thicker. People use it to grind, polish, and sand down objects.
My Top Pick
My top pick is the Makita GA4030K. For the performance power and all of the features that it offers, the GA4030K is an excellent deal. The solid, best quality construction along with the tool case are all big pluses in its favor.
The Central Pneumatic air angle grinder, meanwhile, is a great tool. However, it won’t work without an air compressor. So, you’ll need to buy that as an add-on, which can add a decent bit of money to the purchase.
For all of these reasons, it seems like the Makita GA4030K deserves the best 4-inch angle grinder title in today’s review!