An angle grinder is a versatile power tool that can be used for a wide range of jobs: polishing, grinding, and cutting different materials. Whether you plan to use the tool with speed control at home or in a professional workshop, you want to get a decent-quality model.
Even in the mid-price segment, many grinders can last for many years with proper care and use. To choose the best variable speed angle grinder, read my review, which contains models with a lot of positive reviews, excellent build quality, and affordable prices.
Contents
- 1 Top 8 Best Variable Speed Angle Grinders Reviewed
- 1.1 1. DeWalt Buffer/Polisher 7/9″: Top Pick
- 1.2 2. SHALL Angle Grinder 4-½”: Runner-Up
- 1.3 3. DeWalt Angle Grinder, Small 5 to 6″: Premium Pick
- 1.4 4. ZFE Wet Polisher 4″: Best Choice for Floor Polishing
- 1.5 5. Metabo HPT Angle Grinder 4 ½”: Ideal for Crafters With Small Hands
- 1.6 6. BOSCH Angle Grinder 5″: Robust Tool Body
- 1.7 7. BOSCH X-LOCK Angle Grinder 5″: Easiest Wheel Change
- 1.8 8. Powerbuilt Angle Grinder 5″: Budget Choice
- 2 Angle Grinder Buying Guide
- 3 FAQ on Angle Grinder Variable Speed Control
- 4 Solve Many Technical Tasks With One Grinder
Top 8 Best Variable Speed Angle Grinders Reviewed
- DeWalt Buffer/Polisher 7/9″ ― Top Pick
- SHALL Angle Grinder 4-½” ― Runner-Up
- DeWalt Angle Grinder, Small 5 to 6″ ― Premium Pick
- ZFE Wet Polisher 4″
- Metabo HPT Angle Grinder 4 ½”
- BOSCH Angle Grinder 5″
- BOSCH X-LOCK Angle Grinder 5″
- Powerbuilt Angle Grinder 5″
To write this variable speed angle grinder review, I used not only my own experience in using various tools but also the reviews of friends. Hundreds of unbiased customer reviews on the Internet were also analyzed.
1. DeWalt Buffer/Polisher 7/9″: Top Pick
Specifications:
- Brand: DEWALT
- Included Components: 7IN / 9IN FULLY FEATURED VS POLISHER
- Material: Blend
- Color: Yellow
- Item Dimensions: 4.45 x 8.98 x 21.73 inches
DeWalt is one of the brands that I trust implicitly. This model is an excellent choice for both personal and commercial use. I bought it two years ago, and it still works great. It delivers high performance with a 12 AMP motor.
This tool is remarkable in that you can adjust the number of RPMs for different types of work. The regulator makes it possible to adjust the speed from zero to 600/3,500 RPM. I checked the RPM using a manual tachometer. My measurements were close to those stated by the manufacturer. The tool really maintains the set value even under load.
Protective shields prevent the ingress of wool. Rubber pads on the gear case improve grip and reduce defects on the surface. I like the smooth start. It also runs quietly. The weight is 6.7 lbs, but that’s not a problem as it’s better to work for an hour with a quality model than 3 hours with a lightweight but poor-quality one.
All in all, it is a professional buffer for polishing cars and boats and even for metalworking. I have worked with it many times; the only negative was a little heat. It’s not strong enough to break a tool or burn your hand, but enough to make you notice it.
- Comfortable handle;
- Suitable for heavy workloads;
- Thick power cord;
- An excellent choice for professional auto repair shops.
- The motor gets slightly warm during extended use.
2. SHALL Angle Grinder 4-½”: Runner-Up
Specifications:
- Brand: Shall
- Style: Rpm
- Material: Metal
- Power Source: Corded Electric
- Voltage: 120 Volts
My friend prefers to have several inexpensive grinders in his workshop for different needs. This model has a low cost but, at the same time, decent quality. The motor of this tool is 7.5 AMP, and the maximum output power is 900 watts.
You can use different speeds for different applications, from 3,000 RPM to 12,000 RPM. There are 6-speed modes to select from. The case has a side switch to lock on/off for more convenience. My friend likes the ergonomic handle with 2 positions, made of rubber to reduce vibration while working.
The tool weighs 4 pounds, so it is very comfortable even during extended use. The manufacturer has added an efficient ventilation system for a longer service life. Based on my friend’s experience, as well as online reviews, this is an inexpensive grinder for a wide variety of jobs, from polishing cars to cutting steel.
With a low cost, the model from SHALL has the quality and functionality that will appeal to both home craftsmen and professionals.
- Reasonable price;
- Wide application;
- 6-speed modes;
- Lightweight;
- Convenient to use;
- Decent quality.
- Some customers noted that the kit does not always include all the items the seller declares (usually cutting discs).
3. DeWalt Angle Grinder, Small 5 to 6″: Premium Pick
Specifications:
- Brand: DEWALT
- Style: Angled
- Material: Blend
- Item Dimensions: 17.1 x 7 x 5.8 inches
This model is a small and lightweight but very powerful tool. It weighs in at 5.3 pounds, which is handy if you work at least a few hours every day. The tool is suitable for grinding stainless steel and other jobs requiring high safety. Therefore, the manufacturer has added an electronic kickback brake, activated when the tool stops or jams.
Knowing the high quality of the models of this brand, I gave my father one. He was impressed with the ease of use and security features. He often uses a grinder to shear bolts, removes mortar from brick steps, and grind steel.
For several years, he did not notice any disadvantages, except that the tool was not intended for polishing. The variable speed (up to 9,000 RPM) allows him to select the mode depending on the application. The brushless motor is working properly.
- Lightweight;
- Suitable for heavy workloads;
- Easy to use;
- Thick power cord;
- Additional safety features.
- Low cost.
4. ZFE Wet Polisher 4″: Best Choice for Floor Polishing
Specifications:
- Brand: ZFE
- Material: Aluminum
- Speed: 4000 RPM
- Included Components: Wet Polisher, 50# Wet Polishing Pad, 100# Wet Polishing Pad, 200# Wet Polishing Pad, 400# Wet Polishing Pad, 800# Wet Polishing Pad, 1500# Wet Polishing Pad, 3000# Wet Polishing Pad, 5/8-11 Polishing Plate, 2 x Carbon Brushes, Wrench, Operating Manual.
If you are looking for a quality, versatile, affordable floor and countertop polisher, check out this model. I was advised to include it in the list by a friend who has been renovating the premises for many years.
With the help of this model, he gives a glossy finish to various surfaces. Reviews on the Internet also indicate that this tool has decent quality and high performance.
The design allows for dry and wet polishing. To use water during operation, you need to connect a hose. However, some customers notice that the connection sometimes leaks. But the problem is solved by replacing the sealing ring.
The manufacturer has thought of everything to ensure electrical safety. The model has a rubber handle cover, waterproof protective cover, and double insulation.
6 variable speed settings from 1,000 to 4,000 RPM allow the polisher to be used for a wide range of applications. My friend likes the ergonomic design of the handles and the ability to apply enough pressure to the surface while working. You can use the tool on various surfaces: wood, concrete, marble, etc.
- Increased electrical safety;
- Low price;
- Has a cooling system;
- Quiet.
- The garden hose connection may leak a little, so it’s best to replace the O-ring.
5. Metabo HPT Angle Grinder 4 ½”: Ideal for Crafters With Small Hands
Specifications:
- Brand: Metabo HPT
- Item Dimensions: 12.17 x 2.2 x 4.8 inches
- Style: Corded Electric
- Item Weight: 3.75 Pounds
Since I have been a professional carpenter for many years, I know which brands to trust. Many people think that it is worth buying only expensive models. However, this small grinder has a low cost and decent quality.
I can grind boards for hours without burning the wood. The variable speed from 2,800 to 10,000 RPM allows me to do other work, such as metal cutting. The tool has a dust filter that prevents small particles from entering the motor. This is especially important when working with wood or concrete.
The 12 AMP motor has no brushes, allowing it to run quieter. I like that this tool has safety features: when the wheel is jammed, the power is turned off, and at zero voltage, it turns on the restart protection. This means that when the voltage is stable, the tool will not suddenly start working until you turn it on.
- Acceptable price;
- Smooth start;
- Lightweight (4.2 lbs) and compact body design;
- The motor does not heat up.
- Vibrates a little under load.
6. BOSCH Angle Grinder 5″: Robust Tool Body
Specifications:
- Brand: BOSCH
- Item Dimensions: 12.5 x 2.75 x 2.75 inches
- Style: Rpm
- Material: Plastic
- Power Source: Corded Electric
I know many craftsmen who prefer this model because it is durable and reliable. While the ergonomics could be better, especially for persons with smaller hands, the grinder takes some getting used to.
BOSCH offers a powerful 13 AMP motor with long-life carbon brushes. The speed is adjustable from 2,800 to 11,500 RPM.
If the voltage suddenly goes to zero, you can be sure that the angle grinder will not suddenly start working until you turn it back on. This is one of the best security features that I appreciate.
German quality also guarantees easy tool disassembly for cleaning, as well as minimal vibration during operation.
- Durable construction;
- Smooth start function;
- Engine cooling;
- Does not vibrate during operation
- The paddle switch is inconvenient to use.
7. BOSCH X-LOCK Angle Grinder 5″: Easiest Wheel Change
Specifications:
- Brand: BOSCH
- Item Dimensions: 15 x 5 x 5.5 inches
- Style: Paddle Switch
- Material: Plastic
- Power Source: Corded Electric
BOSCH is one of the brands you trust unconditionally. My colleague purchased this model for wood and metal work. The grinder is durable and guarantees high performance.
The X-LOCK function allows you to quickly change wheels without using a wrench, which saves a lot of time and is an advantage for professionals. On the other hand, you will need to buy X-LOCK BOSCH discs, as others are incompatible with this tool. So this is not the best option for those who want to avoid extra spending or use their own inventory.
In other respects, the quality is top-notch. My colleague has been using the tool almost daily for 3 years and has never repaired it. The 13 AMP motor is constantly cooled by directional airflow. Service life is also extended with epoxy-coated field windings. The variable speed of the model is from 2,800 to 11,500 RMP.
- Durable design;
- Easy to change wheels;
- Additional handle reduces vibration.
- Only X-LOCK wheels are suitable for this tool.
8. Powerbuilt Angle Grinder 5″: Budget Choice
Specifications:
- Brand: Powerbuilt
- Item Dimensions: 4.5 x 17 x 5 inches
- Style: Angled
- Material: Acrylonitrile Butadiene Styrene
- Power Source: AC
Every home should have an angle grinder to carry out various repairs. Some people don’t want to spend hundreds of dollars on a tool. In this case, they should pay attention to this model. It has a minimal cost and will work properly if not used too often.
This was a good option for my friend who wanted to add such a useful tool to her home collection. She noted a comfortable, rubberized handle. My friend also liked the smooth start function and overall decent build quality.
The tool has a 10 AMP motor. You can choose from 6 speeds from 4,000 to 11,000 rpm. This model is suitable for polishing, cutting, or grinding. However, heat from prolonged use makes it not the best choice for professionals.
- Low cost;
- Decent build quality;
- Smooth start.
- Not suitable for heavy workloads.
Angle Grinder Buying Guide
Angle grinders typically have a rather high cost. You definitely want to buy a tool that will work for many years. First, decide on your requirements for a grinder.
In the middle price segment, many options are of high quality. To know what to look for when choosing an angle grinder, read the buyer’s guide.
1. Size and weight
The angle grinder size in the specifications is basically the maximum disc diameter you can use for a particular tool. For most standard jobs, both at home and in commercial workshops, 4″, 4 ½” or 5″ is suitable. Typically, these tools are not too heavy and allow you to perform a wide range of work: from polishing to cutting.
A disc diameter of up to 9 inches means the tool will also be much larger and heavier. Such angle grinders are typically used for industrial use (for example, for cutting thick and strong materials).
Of course, compact tools offer more maneuverability when working in tight spaces. On the other hand, larger grinders have more power and productivity and are more beneficial for larger areas and pieces.
2. Power
Angle grinders can be powered by an outlet or battery. Each of the options has its pros and cons. Corded tools have much more power and do not limit your working time. However, you are limited by the length of the cord. Also, careless handling of the cord can lead to injury or damage to the grinder.
Cordless models do not limit you to cord length. It all depends on the specific tool, but cordless options are not as powerful as corded ones. In addition, you can work for a certain time until the battery runs out.
3. Blade
You can use angle grinder wheels for different jobs like polishing, grinding, or cutting. Different applications require certain types of discs. Polishing equipment is not suitable if you want to cut hard metal.
Please note that all wheels have a maximum speed at which they can be used. If you violate these requirements and exceed the speed limit, part of the wheel may break off and injure you while spinning. High speed can also cause the blade to heat up and, as a result, warp the material you are working with.
The advantage of variable speed is that several modes allow you to work with different applications and wheels. Also, note that a smaller disc diameter is safer at high speeds.
4. Safety
Safety is the most significant point when choosing a rotary blade power tool. Many manufacturers offer many additional features that keep the user safe. These include protective covers for the disk, a smooth start, and special functions that turn off the device if the mains voltage becomes zero. You can also purchase a grinder that quickly stops the wheel if it detects a jam.
5. Durability
An angle grinder is a tool for years. Therefore, it is worth paying attention not only to the cost. A tool with a thick cord, motor cooling system, and thick body material can last long if used properly. The heart and most expensive part of the angle grinder is the motor, so you should pay attention first of all to the characteristics of this detail.
6. Ease of use
It guarantees control, convenience during work, and your health’s preservation. Ergonomic design for easy grip and total control. A lighter weight is preferable if you work several hours a day.
Rubber pads on the handle provide electrical safety and reduce vibration. If you are left-handed, consider whether it would be convenient for you to use this particular model. Some tools have additional handles.
FAQ on Angle Grinder Variable Speed Control
If professionals know a lot about angle grinders, then those who plan to buy their first tool have many questions.
Why variable speed angle grinder?
This universal tool will allow you to use it on different types of surfaces. Different jobs require different speeds, and the adjustable speed angle grinder has a construction, thanks to which you can choose the right RPM.
Does RPM matter for an angle grinder?
Yes, RPM determines what tasks this tool can be used for. For those who perform similar operations, a constant speed grinder may be the best choice. Different applications require variable speeds, such as 1,000 RPM for polishing or 7,000 RPM for metal cutting.
What is the approximate RPM of an angle grinder?
Most models offer you speeds ranging from 5,000 to 10,000 RPM.
Solve Many Technical Tasks With One Grinder
An angle grinder with speed control is an indispensable tool that should be in every home and every workshop. My absolute recommendation is the buffer/polisher from the DeWalt brand for its excellent value for money and high performance. Below you can see a comparison table of all the models I have reviewed.
Best variable speed angle grinder ― Comparison table
| Best Variable Speed Angle Grinders | Motor/Amperage | Weight | Variable Speed |
|---|---|---|---|
| DeWalt Buffer/Polisher 7/9" | All ball-bearing construction, 12 AMP | 6.7 pounds | 0–600/0–3,500 RPM |
| SHALL Angle Grinder Tool 4-½" | With carbon brushes, 7.5 AMP | 7.19 pounds | 3,000–12,000 RPM |
| DeWalt Angle Grinder, Small 5 to 6" | Brushless, 13 AMP | 5.3 pounds | 1,800–9,000 RPM |
| ZFE Wet Polisher 4" | With carbon brushes, 7 AMP | 8.94 pounds | 1,000–4,000 RPM |
| Metabo HPT Angle Grinder 4 ½" | Brushless, 12 AMP | 4.2 pounds | 2,800–10,000 RPM |
| BOSCH Angle Grinder 5" | With carbon brushes, 13 AMP | 5.3 pounds | 2,800–11,500 RPM |
| BOSCH X-LOCK Angle Grinder 5" | Epoxy-coated field windings, 13 AMP | 5.6 pounds | 2,800–11,500 RPM |
| Powerbuilt Angle Grinder 5" | With carbon brushes, 10 AMP | 5 pounds | 4,000–11,000 RPM |
Share in the comments, which function is your priority when choosing a power tool?
“A good tool stays with you for many years and choosing carefully ensures the job is done right, your work is neat, and the tool is always a pleasure to use”
