Air Die Grinder & Stone Kit Set. Stone grinder tool

Air Die Grinder Stone Kit Set

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Description

This die grinder and stone kit set is intended for the professional use of polishing, smoothing, de-burring and sharpening.

The 1/4″ (0.2” diameter, 1“ shaft) and 1/8″ (0.1″ diameter, 1″ shaft) stones are used for grinding. With its multi-functional features, the grinder tool set can be used for hobby, automotive and construction jobs. Thanks to its ergonomic design, lightweight housing, low vibration and variable speed control, the whole device is very easy to handle.

Delivery includes 10 x interchangeable grinding stone, 1 x air die grinder with a 0.2″ collet, 2 x hand wrench, 1 x 0.1″ collet and 1 x air connector. All accessories are well organized for easy transport.

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Angle Grinder: How to Use It and What Can It Cut

An angle grinder is a power tool that can be used for cutting through different types of materials, including metal and other solid materials such as bricks, aluminium, stone and concrete. This type of hand-held power tool does not have a cutting blade but a grinding wheel.

What is an angle grinder

An angle grinder is a power tool that can be used for different projects. You can cut metal, aluminium, concrete, bricks, pavers, wood, and other dense materials; you can sand and polish different surfaces to sharpen tools and grind materials.

Angle grinders can be used with different types of discs for different jobs. You can buy grinders in different sizes. The most popular one is with 10-12cm grinders. The power tool can be cordless or with a variety of motor powers for more precise work.

Angle grinder safety

Angle grinder safety is a must. Angle grinders are electronic tools and are driven by power motors. Their blades can have sharp edges. Using power tools requires taking some precautions because slips and falls may lead to dangerous accidents.

Here are some safety tips for your work environment:

• Declutter the workspace Remove all tools, cables and toolboxes from the area, you’re going to use the angle grinder. This way, you’ll be comfortable moving around without worrying if you’ll create a mess. Keep the tools in an easy-to-access place in case you need anything.
• Be careful with the power cables Keep them behind you so you won’t cut or damage them. Place them in a position where you won’t trip in them.
• Remove flammable substances Remove gasoline, diesel, oils, paper and other flammable materials to avoid fire hazards. The angle grinder produces sparks while working, and they can ignite these materials.
• Remove jewellery, earphones, strings and anything that can get caught between the angle grinders
• Have a fire extinguisher in hand Be prepared in case of fire hazards. Having a suitable extinguisher for all types of fires will prevent a lot of accidents.
• Never work in a wet area Avoid working during rain or in wet areas. Don’t use a tool if it’s not completely dry no matter the situation.
• Wear protective gear You should always wear personal protective equipment to protect your eyes, ears, lungs and hands. Safety goggles need to be worn to protect your eyes from sparks and particles from different materials. Clothing and goggles must be the right size and fit you correctly. It’s recommended to wear earplugs to protect your ears and thick gloves to protect your hands from cuts, sparks and hot, sharp metal edges.

How to use an angle grinder

The secret to successfully using an angle grinder is choosing the right type of cutting disc. Avoid using damaged or broken discs because they can throw out fragments or shatter during usage, creating a dangerous hazard. There is also a difference between cutting and grinding discs. Cutting discs are thin and sharp and can’t be used for grinding.

• Make sure that the grinder is attached properly and the bolts are tightened.This may come as strange to you, but did you know that discs have an expiration date too? This is because moisture and rust can damage the disc.
• Don’t push the disc in the material to force it to cut. This can overload the power tool. Instead, angle the grinder so that sparks are thrown in a different direction from you, and allow the tool to develop maximum speed and press it gently onto the material you’re cutting. Keep the disc on 90 degrees all the time and avoid twisting it because it can bend or break.
• Cut all the way through the material. Don’t stop the disc before you’re done because the disc can stick in the material. Let the part you’re cutting fall on the ground and stop the tool then. The part will be hot so let it cool down for a few minutes before touching it.

Power tools differ in sizes, types and brands, so always read the manual instruction carefully and get to know how to use the angle grinder.

Cutting metal, aluminium and steel with an angle grinder

Metal is a hard material. You can use it for all kinds of metal, including bolts, pipes, iron, steel and sheet metal. You’ll need to use an abrasive metal-cutting disc. Secure the disc on the grinder and place the metal on a flat surface. Secure it well on the surface with a C-clamp.

Mark a line where you’re going to cut with a marker. Put on the protective gear, including the gloves. Start cutting the metal with light pressure. Position the grinder and move slowly through the metal. The cutting disc is thin, so pressing too hard may result in kickbacks.

If you’re cutting steel, after you’re done, remove the metal-cutting disc and use a flapper disc along the edge of the steel to smooth it out.

Cutting concrete, pavers and stone with an angle grinder

Concrete is hard and thick and produces a lot of dust and fumes during the cut. To reduce the grime, you can wet the material before the cutting.

Segmented rim discs are specially designed for concrete. They have toothed blades that help extrude the dust and cool down the blade with airflow. Overheating the blade may result in damage and safety hazards. With segmented rim blades, you can also cut bricks, masonry, pavers, granite and limestone.

Cutting wood with an angle grinder

The angle grinder is a great tool to cut, carve, sand and shape wood. The grinder comes with a lot of discs designed specifically for processing wood. Consider how much wood you want to remove and how fast to define the correct cutting disc for your needs.

There are two main types of blades for cutting wood:

• Abrasive flap bladesThis blade is created by a lot of small pieces of sanding paper glued to the side of the disc, forming a bumpy surface. This type of grinder is used for sanding wood.
• Abrasive carving bladesThis blade is formed by sharp, little teeth positioned at the end of the disc. It can be used for shaping and carving wood into furniture and big or small wooden sculptures.

Angle grinder sizes

The angle grinder size is determined by the size of the disc, not the length of the tool itself. Smaller discs are spinning way faster and leave a clear cut behind.

The most common grinder disc size is with a diameter of 12 cm. It can be used for small jobs as cutting wood or metal with a maximum thickness of 2-3 cm. It’s not recommended to use it for cutting stones and concrete.

The 18cm discs can be used for small pieces of wood, thin metal and aluminium, which are 4-5cm thick. The 23 cm discs can cut larger pieces of any material that is 7-8cm thick.

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Magical Grinders; The Best Angle Grinders in 2023

Using Angle Grinders to Cut Metal is one the most convenient ways of metal fabrication as angle grinders are a metalworker’s right hand; You can tackle a wide range of metalworking operations with the right angle grinder equipment and accessories while staying safe on the job. An angle grinder is a versatile tool that may be used to work with a number of materials and applications.

Can You Use Angle Grinder to Cut Metal?

“Can you use an angleAngle Grinders to Cut Metal?” is a question that pops up frequently on the appropriate message boards. What’s the quick and easy answer? Absolutely! Indeed, among the many hand-held equipment available, the angle grinder appears to be the most flexible of metalworking power tools. That’s why it’s no surprise that this specific item is utilized by a variety of crafts, including those in the automotive sector, HVAC, plumbing, and a variety of others.

Grinders are often used for refurbishing and polishing metal materials, so it shouldn’t come as a surprise that you can use them on stainless steel surfaces if you have the correct disc.

You shouldn’t, however, go into the process without taking any safeguards. That’s why, throughout the post, we’ve included a few safety guidelines to assist you learn how to use angle grinder to cut metal in the most efficient and effective way possible.

How to Use an Angle Grinder to Cut Metal

Now that we’ve established the notion of using an Angle Grinders to Cut Metal, let’s examine what the optimum way of operating an angle grinder to cut metal. We must point out that the method is not always the same because different angle grinder models work in different ways. Even yet, the safety measures you must follow while cutting metal or steel are very similar.

What is the maximum thickness of steel when operating an angle grinder to cut metal?

It truly relies on the angle grinder’s cutting capacity as well as the size and type of disc you’re using. Apart from that, the thickness of the material you’ll be cutting is a determinant in determining the steel’s possible cutting depth.

Not only that, but cutting discs come in a variety of thicknesses, so you’ll need to pick the proper one.

But let’s pretend you’re using a 4-1/2-inch grinder with a flat diamond cutoff blade to cut stainless or mild steel, as most people do. A 1mm or 1.6mm iron-free disc should be used to cut the stainless steel.

When cutting thin metal materials like sheet metal, a 1.0mm or 0.8mm cutting disc is recommended. Due to the reduced blade thickness that results in less heat transmission, any of these discs will provide a cleaner appearing cut and minimize any potential discoloration.

When cutting or buffing metal or aluminum with an angle grinder, using a type saw lubrication will extend the disc’s life and prevent the risk of chipping.

If you’re going to chop thicker, heavier steel like rebar or structural steel like angle iron, you’ll need a cutting disc with a thickness of 1.6mm or 2.5mm. Using a bigger blade, such as a 2.5mm cutting disc, to cut through dense steel has certain disadvantages.

Due to the slower blade speed of the bigger disc-equipped, the completed cut of your steel workpiece may show evidence of discoloration. What is the reason behind this? Because of the increase in friction, essentially.

You could always use another power tool to cut metal, depending on how thick the material is and how clean of a cut you want.

While accuracy and elegance are required when cutting thick, dense steel, a metal cutting circular saw or a metal chop saw are two of the most common suspects. Break out the trusty grinder if all you want to do is make short cuts when accuracy and overall aesthetics are secondary concerns. Simply use the suggested CDs whenever possible.

The Best Angle Grinder for Metal Work

If you’re looking for a high-quality, easy-to-useAngle Grinders to Cut Metal with, here we present you some of the best tools in the market today.

Bosch 4-1/2-Inch Angle Grinder

The Bosch 4-1/2-inch angle grinder has a powerful 6.0amp motor that produces 11,000 no load rpm for professional cutting and grinding. Its Efficient motor has a very tiny field diameter, allowing the operator to grind or cut with minimal effort. This item is lightweight, with a small size and shape that makes it suitable for metal craftsmen. Vehicle fabricators, plumbers, and other professions who utilize grinders on a regular basis, such as home builders, are among those who employ them.

Ronix 3212 Angle Grinder, 2350W, 230mm

Having a strong an Angle Grinders to Cut Metal and other difficult materials is a huge benefit for a professional metal worker who conducts a lot of grinding and metal fabrication operations. The Ronix 3212 Angle Grinder is a powerful power tool that can tackle a wide range of industrial and heavy-duty tasks. You can confidently operate this angle grinder to cut metal any time.

Makita 9557PBX1 4-1/2″ Cut-Off/Angle Grinder

Makita’s angle grinder is a high-quality tool for metalworkers. A powerful 7.5 AMP motor provides high output power in a smaller, lighter tool. You may carry this device anyplace and cut metal with ease by using both hands to control it.

The ‘tool-less wheel guard adjustment allows effortless clamping, and it also offers a grinder with an AC/DC switch for use with various power sources, which is a nice feature of this Makita angle grinder.

Safety Tips When Operating an Angle Grinder to Cut Metal

When you use Angle Grinders to Cut Metal or grind it, small chips or shards of metal fly all over the place. They can also be fiery and abrasive. Follow these guidelines to avoid eye injuries, wounds, burns, and other problems when cutting metal: Read and follow all safety warnings on metal-cutting discs and blades. Protect your eyes and ears with safety glasses, a face shield, and hearing protection. Wear gloves, a long-sleeve shirt, and slacks to protect any exposed skin.

Let newly cut metal cool completely before handling it.

When working with metal that may have sharp edges, use gloves.

Before cutting metal, secure it with a clamp. If you’re use angle grinder to cut metal, don’t let anyone close you unless they’re wearing hearing and eye protection.

Suggested disc types.

You can use angle grinder to cut metal and all types of it, including bolts, angle iron, rebar, and even sheet metal, when it’s equipped with an abrasive metal-cutting disc. However, as you use the discs, they wear down fast, cut slowly, and reduce in diameter. Instead, we recommend utilizing a diamond blade with a ferrous metal cutting rating. These will last far longer than abrasive discs, cut quicker and cleaner, and wear down much slower.

The Disc Type	Application	Consideration
Metal cutting disc / cut off disc	Most metals can be cut. It can’t be used to grind anything. Present at a 90-degree angle to the workpiece	Aluminium Oxide is used to make the cutting edge
Grinding disc	Metals, both ferrous and non-ferrous, are ground. Present at a 45-degree angle to the workpiece.	Aluminium Oxide is used to make the cutting edge.
Multi-cut cutting disc	Metals, both ferrous and non-ferrous, are cut through (including stainless steel). For more sophisticated cutting needs, it will also cut through brick, stone, contemporary composites, and tiles.
Stainless steel cutting disc	Steel and stainless steel are cut through. It’s especially handy for cross-sections with tiny cross-sections.
All cut diamond blade	Cast iron, various ferrous and non-ferrous metals, and most building materials are all cuttable.	Cutting edge with diamond grains attached to it.
Abrasive grit mop disc	Metal grinding in general, especially for edge grinding jobs like deburring, sharpening, and surface finishing.	Grinding flaps in a fan-shaped radial pattern.
Slitting disc / thin cutting disc	Pipes and profiles with thin walls are cut. This tool creates a fine cut line. Use on ferrous and non-ferrous metals, as well as stainless steel.	Thin cutting discs produce less heat during operation, cause less tool vibration, finish cuts faster, and waste less metal in each cut, saving up to 2 mm each cut.

FAQ1. What tools do I need to cut metal with an angle grinder?the necessary tools when it comes to metal cutting with angle grinder are: angle grinder, metal disc, c-clamp, power outlet/source, earmuff and the metal material you plan to use.

What’s the difference between a cut-off tool and an angle grinder?A cut off tool is used to cut surfaces, as its name implies. The angle grinder, on the other hand, is a more flexible tool that can be used for a variety of activities such as sharpening and grinding.

Is it possible to cut steel with an angle grinder?Yes, if you have the appropriate disc. However, due to the steel’s hardness, they will wear out more quickly.

Is it possible to useAngle Grinders to Cut Metal. even a thick steel piece? Yes, it surely can. At the end of the day, cutting metal with an angle grinder may be very effective and incredibly safe if you have the proper equipment and safety gear.If you’ve never used a grinder before, you won’t need much practice to learn the skill of slicing and dicing materials properly. That is, as long as you use the suitable cutting disc with this powerful hand-held equipment.Because an angle grinder is designed to cut through stronger metals, as well as bricks and concrete, you won’t have to worry about its durability. In time, a decent grinder will become a need rather than a luxury.While the ordinary DIYer is unlikely to be hacking at dense steel on a regular basis, a good grinder is the one equipment you’ll want in the back of your truck or tool shop if you need to make Rapid cuts in metal.Finally, when using a grinder, make sure you are in complete control of the equipment and that you are wearing the proper protective safety eyewear. All that’s left to do now is select the appropriate cutting disc and material, and begin cutting metal with ease.

Rely on a quality angle grinder for cutting, grinding, carving, and a host of other tasks.

By Timothy Dale and Tom Scalisi | Updated May 20, 2022 11:08 AM

We may earn revenue from the products available on this page and participate in affiliate programs.

Angle grinders are versatile power tools that can handle a variety of projects, such as cutting iron pipe to replace a faulty valve, carving wood to craft furniture, cutting tile for a backsplash, and removing grout from between tiles.

Interchangeable rotating discs—some made for cutting and others with an abrasive edge for grinding—can be swapped out based on the application. For safety, a guard sits between the disc and the handle to protect the operator.

If you’re ready to add this tool to your collection, read on for more on its capabilities and what to look for in the best angle grinder. Each of the top picks below was selected after an in-depth review of the market and thorough product vetting.

• BEST OVERALL:Makita XAG04Z 18V LXT Cordless Cut-Off/Angle Grinder
• BEST BUDGET:Metabo HPT 4.5-in 6.2-Amp Angle Grinder
• UPGRADE PICK:DeWALT 20V MAX XR Brushless Cut Off/Grinder
• BEST CORDED:Porter-Cable Angle Grinder Tool, 4-1/2-Inch (PC750AG)
• BEST LIGHT-DUTY:Black Decker Angle Grinder Tool, 4-1/2-Inch (BDEG400)
• BEST HEAVY-DUTY:DeWALT Angle Grinder Tool, 4-1/2-Inch (DWE402)

What to Consider When Choosing the Best Angle Grinder

There are a few things to understand before clicking “add to cart” on just any old angle grinder. The best angle grinders may have unique features, different power sources, and some might simply be better suited to particulars. The following points are worth considering when shopping for a good quality grinder.

Disc Size

Angle grinders come in sizes, denoted by a number that refers to the maximum diameter of the grinding wheel or disc it will handle. For most DIY projects, a 4-, 4.5-, or 5-inch disc will suffice. In fact, these compact sizes and weights are ideal for DIYers, as larger discs can become unwieldy or tedious to work with.

Larger discs (up to 9 inches) are more commonly used in industrial situations by professionals cutting through thick pieces of material. As the disc gets larger, the grinder itself must be larger to handle the cutting strength. This translates to a heavier tool that’s likely to cause hand fatigue sooner than using a small angle grinder.

Power Source

Angle grinders are available as corded models (which plug into an electrical outlet) and cordless (which use a battery).

• Corded grinders typically generate more power at a consistent level due to the direct connection to the outlet. But corded models restrict the user to a physical location, limiting range without an extension cord. The cords can also be a tripping hazard and, therefore, a nuisance while working on a project.
• Typically, cordless grinders lack the sheer power of their corded counterparts. And functionality depends on battery capacity, so a dead battery could mean downtime in the middle of the project. On the plus side, cordless angle grinders offer hassle-free mobility and are better for use in tight spaces.

Speed

Angle grinder speed is measured in revolutions per minute (rpm). Speeds typically range between 5,000 and 10,000 rpm, though some very robust grinders reach up to 12,000 rpm. Keep in mind, however, that the rpm rating is under “no-load” conditions, meaning that the disc isn’t cutting or grinding anything, just spinning in the air. Once the disc is cutting or grinding, that speed will lower considerably.

Obviously, the higher the rpm, the easier and more quickly the tool can cut through the target material. But the disc also becomes hotter at higher speeds and could be vulnerable to rupture—an injury risk. Be sure to use the correct disc for the task, and note the maximum supported speed marked on the disc. For example, a disc rated at 7,500 rpm that is running faster can break under the force, sending shards of the grinder wheel flying.

Voltage/Amperage

Angle grinders measure power output potential in volts (V) and amperes (amps). Cordless angle grinders use volts to measure the power available from their battery, with most cordless models using 18-volt or 20-volt batteries and outliers ranging from 7.5 volts to 24 volts. The “magic number” in most cordless power tools is 18 volts to 20 volts, offering the best mix of affordability and functionality.

Voltage readings on corded angle grinders only indicate whether they can be used with 120-volt or 220-volt power outlets. Shoppers can assess the power output potential of corded models by checking amperage, which ranges from 5 amps to 15 amps. Larger discs will require a larger output, so for a 7- or 9-inch grinder, expect it to have a higher power output potential.

Hand Guard

The guard on an angle grinder is a crucial safety measure that covers half the disc. Its purpose is to protect the user’s hands, by preventing sparks and debris from flying toward the user, and to protect surfaces from damage when using the grinder in tight spaces.

Some angle grinders have a movable guard, and others have a fixed guard. The movable option is more popular as it allows for left-handed or right-handed use and can adjust to better protect the user from flying debris. If left untightened, however, a movable guard can fall off the unit. Fixed guards are more robust, and there’s no risk of them coming off a grinder.

Soft Start

Because angle grinders are fast, powerful tools, they can recoil a bit upon power-up. This is particularly true if the grinding wheel is large and heavy. The recoil from the motor can result in the angle grinder jumping in the user’s hands, potentially causing serious injury.

To combat recoil, soft-start technology reduces the power output to the motor at first, slowly increasing until the angle grinder is fully up to speed. This throttled control over the power output prevents an angle grinder from recoiling during start-up, increasing safety while also reducing the jolt to the user’s arms and wrists.

Tips for Buying and Using an Angle Grinder

Keep these tips in mind when choosing and using an angle grinder.

• The most common DIY projects where an angle grinder will be of use—such as cutting tile or pipe, metalworking, or removing grout and mortar—rarely require more than a 4.5-inch grinder.
• The ongoing vibration of an angle grinder can cause what is known as Hand-Arm Vibration Syndrome (HAVS), with symptoms including pain and cold sensations in the user’s fingers, loss of grip strength, and a loss of sensation in the fingers and hands. An angle grinder with cushioned or vibration absorbent material on the grip can protect hands from ongoing vibration.
• Always wear personal protective equipment (PPE) including safety glasses/goggles, hearing protection, and respiratory protection when grinding.
• Check the grinder before use to ensure the disc and guard are properly attached and tightened. Discs and guards can become loose between uses. Tighten them before connecting the power to the angle grinder.

Our Top Picks

While all that information on the best angle grinders ought to be helpful when shopping, there’s really no substitute for hands-on testing. Tom had the pleasure of personally putting all the following angle grinders through their paces during a recent metalworking project.

Each of the models reviewed passed our tests and met our standards (see “How We Tested,” below), though Tom found some models better for specific tasks than others. Note that all of the following models feature movable guards and screw-in handles.

Makita XAG04Z 18V LXT Cordless Cut-Off/Angle Grinder

The Makita XAG04Z is worth checking out by anyone looking for the best cordless angle grinder performance. This top-rated angle grinder features an 8,500 rpm top speed thanks to its brushless motor and the 18-volt lithium-ion battery. It can handle 4.5- and 5-inch discs.

We found the XAG04Z excellent to work with. While it doesn’t boast the highest top speed, the automatic speed adjustment enabled it to maintain speed during tough cuts and grinds. We noticed very little vibration thanks to the rubber over-molded grip and handle, and the lock-on switch proved to be a huge plus.

The only downsides I see: Assembling the two-piece handguard was a little awkward, and it would be nice if the tool came with a battery and a charger.

Product Specs

• Automatically adjusts speed and torque settings
• Slow start keeps the tool from jumping
• Lock-on switch
• Very little noticeable vibration

Get the Makita angle grinder at Amazon, Walmart, The Home Depot, and Ace Hardware.

Metabo HPT 4.5-in 6.2-Amp Angle Grinder

When it comes to DIY projects and budgets, not everyone can afford top-of-the-line tools every time. So those hoping to save cash and still get a quality grinder may want to give this corded model from Metabo HPT a look. It uses 4.5-inch discs, has a 6.2-amp motor, and spins at up to 10,000 rpm.

This is one of the best 4.5 inch angle grinder options for the money, and the Metabo HPT’s usefulness was somewhat of a surprise. I enjoyed how compact and lightweight it was in my hand. The location of the power switch is very convenient, especially during cutting.

The lock-on feature allowed me to kick it on and leave it on—very helpful in my project. My only complaint is that the Metabo HPT lacks the power of other corded models, and the 6.2-amp motor seemed like it could overheat during all-day use.

Product Specs

• Lock-on switch for long use
• Lightweight angle grinder (only 4 pounds)
• The most compact of all the grinders tested
• A little lacking in power compared to other corded models
• The 6.2-amp motor isn’t ideal for all-day use

Get the Metabo angle grinder on Amazon and at Lowe’s.

DeWALT 20V MAX XR Brushless Cut Off/Grinder

DeWALT’s 20V Max XR Brushless Cut-Off/Grinder cordless angle grinder could be the ultimate upgrade for pros and DIYers who take their tools seriously. This cordless model utilizes the brand’s 20-volt Max XR lineup, and its brushless motor spins 4.5-inch discs up to 9,000 rpm.

My experience with this DeWALT model was just as I expected: great portability and truly outstanding power. It made short work of cutting and grinding, without a cord to get in the way. The grip and handle both feature thick rubber, keeping vibration and fatigue to a minimum.

The safety features are certainly a plus: The electronic brake stopped the disc within 2 seconds (other models can take up to 10 seconds), and simply knowing that there is a kickback brake instilled confidence.

Product Specs

• Safety includes two-stage trigger, electronic brake, and kickback brake
• Excellent ergonomics and anti-vibration
• Plenty of power

Get the DeWALT angle grinder at Amazon, Walmart, and Lowe’s. Check for a refurbished DeWALT on Amazon.

Porter-Cable Angle Grinder Tool, 4-1/2-Inch (PC750AG)

This Porter-Cable product is one of the top corded angle grinder options for dependable power. This model features a heavy-duty 7.5-amp motor that spins a 4.5-inch disc at speeds up to 10,000 rpm, providing plenty of speed and power for workshop use.

The Porter-Cable grinder felt truly in its element on my metalworking project, handling cuts and grinds nicely. While it doesn’t have the most power compared to others on our list, it’s pretty close. It’s also one of the only grinders to feature a traditional trigger switch, which I felt was easy to use and more intuitive than most. I also really liked the top-mount position for the handle attachment, as it can make cutting much more manageable.

The one negative worth mentioning is that vibration control isn’t top-tier, so although it can take all-day use, the user’s hands and wrists might tire.

Product Specs

• Top-mounted handle position
• Comfortable trigger switch
• The 7.5-amp motor has plenty of power

Get the Porter-Cable angle grinder at Amazon, Walmart, and Lowe’s.

Black Decker Angle Grinder Tool, 4-1/2-Inch

If you’re searching for the best angle grinder for wood carving, sanding, grout removal, and other light-duty projects, Black Decker’s Angle Grinder Tool might be a wise choice. This affordable model features a 6-amp motor that produces up to 10,000 rpm of speed, and it’s compatible with 4.5-inch grinding and cutting wheels.

Black Decker markets this model at light-duty, DIY-type users, and that’s where it excels. This very affordable model is easy to use, thanks in part to its lock-on trigger. The three-position handle mounting system works for plenty of scenarios, such as cutting and grinding at unusual angles. Just don’t expect the Black Decker to handle heavy-duty jobs like large metalworking projects for any length of time, as it only has a 6-amp motor.

Product Specs

• Plenty of capability for the price
• Three-position handle, including top-mount
• Trigger locks into position

Get the Black Decker angle grinder at Amazon, Walmart, The Home Depot, Lowe’s, and Ace Hardware. Check for a refurbished Black Decker on Amazon.

DeWALT Angle Grinder Tool, 4-1/2-Inch (DWE402)

Heavy-duty projects like production welding and cutting require a grinder that can keep up, and DeWALT’s DWE402 can handle the job. This burly machine features an 11-amp motor and spins 4.5-inch grinding and cutting wheels at speeds up to 11,000 rpm.

I found the DWE402 to be the ideal grinder for my work, though not everyone will need its power and high-speed capabilities. It cut through angle iron faster than any other grinder, and it made short work of my large, lumpy, amateur-grade welds (though it’s definitely a pro-grade tool, and the speed-boosting button on the handle base helped a lot).

While this is one of the best variable speed angle grinders, neither the DWE402’s vibration control nor its grip got much attention on the drawing board.

Product Specs

• Pro-grade capability
• Very fast and powerful
• High amperage motor for heavy-duty work

Get the DeWALT angle grinder at Amazon, Walmart, and Lowe’s.

Our Verdict

With portability and power in mind, the Makita XAG04Z is a great choice for almost any home workshop, though pros may also appreciate this model. And for those who need the best angle grinder for cutting metal and other heavy-duty weld materials, the DeWALT DWE402 has the power and speed to match.

How We Tested the Best Angle Grinders

Sometimes, I have the best job in the world. I’ve had a project on my plate for months now (building a welding cart), and it just so happened to be the ideal project to test these top angle grinders. I used the same set of cutting and grinding wheels for each model to make apples-to-apples comparisons.

I used each grinder to cut through angle iron, switching grinders between each cut until I felt comfortable with the strengths and weaknesses of each model. I recorded myself cutting all the pieces for the welding cart in order to determine how long each cut took and how easy it was to use. After cutting all the pieces, I welded the cart together (rather heavy-handedly, I admit, as it’s been a few years since I last welded).

With those big, burly welds to address, I used each grinder to knock them down to flush. Again, I noted ease of use and handling. In the end, I had all I needed for these honest angle grinder reviews—as well as a cart for my new welder.

Shopping for a Used or Refurbished Angle Grinder

Historically, most people would baulk at the idea of spending good money on a used or second hand tool, but today’s refurbished models are not the dubious equipment found at a neighborhood yard sale. For some time, reputable manufacturers and retailers have been offering refurbished or renewed products like angle grinders alongside new models.

The idea is that when a commercially viable fix is possible, it cuts down on waste—which is always a good thing. It may also offer buyers the opportunity to acquire products that might otherwise be outside their budget.

These should not be tools that have been beaten to death for 364 days and returned on the day the warranty expires. It’s true that often they have been tried by another buyer but will have been returned within a relatively short return window. Other times, they might be tools damaged in transit or in the warehouse.

So are refurbished angle grinders any good? In our opinion, yes. There’s every chance they could represent a real bargain. There are some interesting offers on refurbished or renewed angle grinders at Amazon and Walmart among others. However, care and common sense is needed.

• Specify the type of angle grinder you want first. Look at new models. Then see what you can get on the refurbished market that comes close to those specifications.
• Keep a tight rein on your budget. It’s easy to get carried away. The idea here is to save money, or get better value.
• You should be looking for a substantial cost reduction. If the saving is only saving 10 percent or 15 percent, it might be better to buy new. Make sure you know exactly what is included. Cordless tools often won’t include battery or charger, for example.
• Be sure to check warranty and return periods before you order. Don’t make assumptions, even if you bought from the retailer before.

While refurbished, reconditioned, or renewed tools are often excellent, there’s always a chance it could be a dud. Buy from a reputable source. Check the angle grinder as soon as it arrives so you can get your money back if there’s a problem.

FAQs

Even with ample background on the best angle grinders, you might have some additional questions. Here, we answer some of the most common queries about angle grinders, so check for the info you need below.

Q: What kind of tasks can I use an angle grinder for?

The most common uses for angle grinders are metal grinding and cutting, such as steel for welding or metal piping. However, they’re also useful for wood carving, refinishing, and other projects. Some farriers even use them to trim hooves.

Q: How does an angle grinder operate?

After attaching the correct disc for the job, hold the angle grinder in two hands for safety and security (the tool’s initial torque will cause it to jump). Push the trigger down or hit the power switch, and the disc will start rotating. Move the grinder until the rotating disc contacts the material you want to cut or grind.

When finished, release the trigger or switch off the power button and wait for the disc to stop rotating completely before placing it in a safe location, keeping in mind that the disc is still hot due to the friction caused during operation. Unplug the power cord or detach the battery and allow the tool to cool down.

Q: How much does an angle grinder cost?

An angle grinder can range in price from just 30 to over 200, though it’s more common for these tools to cost about 80 to 100.

Q: How do you cut metal with an angle grinder?

Use a metal cutting disc on an angle grinder to cut through lead, iron, copper, and other metals without a problem. The rotating blade slices easily through metal, but it’s important to wear safety glasses and gloves because a significant amount of sparks are produced during the grinding process.

Q: How do you cut pavers with an angle grinder?

Angle grinder equipped with masonry discs can be used to cut through paving stones without much difficulty. Measure and mark where you want to cut the paver, then position it on a workbench. Turn the grinder on and start to slowly cut into the paving stone. Once you have started the cut it will be easier to accurately finish cutting through the paver.

Q: How are the discs on an angle grinder changed?

First, unplug the grinder or remove the battery. Then remove the nut that holds the disc in place, using the factory spanner included with the angle grinder. Replace the disc and tighten the nut bolt using the factory spanner.

Q: How can I remove the disc with vise grips?

Grinder discs are secured with a specialized nut that is usually tightened or removed with an included spanner. However, if you lose the spanner the nut can still be removed with a set of vise grips. Simply tighten the vice on the grinder blade, locking it in position, then use your hand or a screwdriver to turn and remove the locking nut.

Q: How do you properly recycle an old angle grinder?

Instead of tossing your old angle grinder in the trash, take it to a local electronics recycling location. Typically, the municipality or town will have a program for recycling electronic tools and other devices, though some home improvement stores, like Home Depot, also offer tool recycling programs.

Best Wet Polisher / Grinder for Ceramics and Sculpture

There are a variety of wet polishers/grinders on the market, but models from Flex, Makita, and Metabo are clear market leaders. These are long-lasting, professional-grade tools that will hold up under heavy use for all your grinding and polishing needs. There are other options, but the top three picks are clearly superior to various generics and off-brand models. These tools are mostly designed for polishing and routing marble and stone, but they work great with ceramic, glaze, concrete and other materials.

A complete review and guide to wet polishers is below, but first:

TOP PICK: Flex LE 12-3 100 Variable Speed Wet Polisher / Grinder

The top pick (and the model I use in the studio) is the Flex LE 12-3 100 Variable Speed Wet Polisher / Grinder.

The Flex polisher has a 9.3 amp motor with speeds ranging from 1200 to 3700 RPM, can accommodate up to 5 inch pads, weighs 5.5 lbs (2.4kg), and it is made with high-quality rubber hoses and cords that stand the test of time. One distributor reports that of all the wet grinder models, this gets returned the least, speaking to its quality. The Flex Variable Speed Wet Polisher typically retails for around 320-340.

Like most power tools, you do have to pay for quality with wet polishers. The top three models from Flex, Makita and Metabo are among the most expensive models, generally costing between 300 and 350 plus extra for a pad and grinding discs. But for an electric tool used in such close proximity to water, you definitely want a tool that you can trust.

Is this a necessary tool for everyone? Most likely not. A wet polisher/grinder is a specialized piece of equipment. But once you have one, you’ll find lots of uses ranging from clean up and polishing, to opening up new decorative possibilities with ceramic glazes. And it’s always great to have a water-based sanding operation to keep dust down in your studio.

SAFETY NOTE

Wet polishers / grinders have electrical motors and a water feed. Use proper safety equipment including eye protection, rubber gloves, and possibly a rubber apron. These machines will cast water in many directions, so create a protected area and endeavor to keep water away from the motor and electrical cords. If you feel a “tingle” of electricity, cease use and assess what is causing the problem. All of these tools come with a built-in Ground Fault Circuit Interrupter (GFCI) and if possible, you should plug them into an outlet that also has a GFCI. If the on-unit GFCI is not working, do not use the tool.

Top Pick: Flex LE 12-3 100 Variable Speed Wet Polisher and Grinder

The Flex LE 12-3 100 is the top pick because of its many high-quality features including variable speed, ability to accommodate up to 5” pads, quality of construction including a rubber hose that won’t get kinks, and durability. It’s a close race with the Makita and Metabo models, but this German-made machine stands out for it’s overall quality and ease of use. I’m happy to report that this is the machine I have been using in my studio and it has held up under 6 years of frequent use. If I was shopping today, I would look most closely at this model and the Metabo.

The Flex comes with a 1 year warranty, and has a 9.3 amp motor with speeds ranging from 1200 to 3700 RPM. It does not come with an adapter for the quick-release hose, so you will have to find something that works for your studio. I use a simple garden hose to quick-release connector and I’ve also found attachments to get the hose connector fitted on a faucet.

Flex also makes a single speed model that costs about 20 less, but I think a variable speed wet polisher is the way to go. I typically use speeds ranging from 2 to 4 on this, or 1700 to 2400 RPMs. The speed adjuster is a dial on the back of the tool (see pictures below).

If you read online reviews, the only drawbacks that users report is difficulty finding the right hose connector (I found it easy to find however) and some report GFCI issues. I am very careful when using a wet polisher, and can say I’ve never felt one tingle or shock from this machine.