A 4-1/2 inch angle grinder is a versatile tool for a wide range of projects. From cutting to grinding to polishing, the angle grinder should be able to do it all.
Picking the best 4 1/2 inch angle grinder should be easier through this comprehensive guide. You need to find a model that offers incredible power and long-lasting performance.
These tools are designed to be easily portable from one workstation to another. You should also consider the relevance of comfort and control in your selection of a great angle grinder for your work.
Look for strong motors and features designed to ensure durability. An angle grinder is an investment that you need to fully research before selecting just any model.
Top 4-1/2-Inch Angle Grinders
10 Best 4 1/2 Inch Angle Grinders:
1. DEWALT DWE402 Angle Grinder
The DEWALT Angle Grinder Tool (DWE402) has an incredible power-to-weight and size ratio that puts it ahead of many other 4.5-inch angle grinder models.
This angle grinder has some of the most exceptional power and control, with several notable innovations built into the machine so that it can perform well throughout any challenge.
You do not need to have a lot of training to learn how to use this grinder. The guard has a one-touch design that lets you rotate it 360 degrees without using any wrenches.
The wheel has a release button, which allows you to quickly remove and replace discs without tools, too.
A more ergonomic side handle lets you be more precise on projects. The gripping surface is much smaller than other handles, which provides the user with more comfort.
You will not feel like it is too difficult to grip or control this tool while it is operating.
The motor is more durable due to the Dust Ejection System. This system pushes out any damaging debris that tries to come into contact with the inner parts of the motor and gears.
All of the brushes inside the motor last two times longer because they are double the size of regular brushes. The transmission life is better because the design of the spiral bevel gears increases the tool lifespan.
- Oversized brushes equal longer brush life
- One-touch guard rotation
- Auto-off brushes have an automatic shutdown feature
- Spiral bevel gear provides longer transmission life
- Dust ejection system prevent dust build-up and damage
- Quick-change wheel allows for tool free wheel removal
- A heavier tool for long-term use
- Paddle switch is sometimes hard to operate
2. Makita 9557PBX1 Paddle Switch Angle Grinder
The Makita 9557PBX1 4-1/2 inch Angle Grinder is a versatile choice if you plan on cutting, grinding, or polishing different materials. And with its convenient carrying and storage case, you can haul it wherever the work takes you.
This angle grinder is reliable and powerful. It has a sturdy motor that can deliver up to 11,000 RPM at no-load speed.
Dust and debris that gets in the motor and bearings may decrease the overall tool life. You can prevent this with seals in the motor and protective varnish.
The seals have a labyrinth-style construction to prevent dust from getting into the motor to damage it.
A zig-zag varnish acts as another way to protect against wear from abrasive debris and dirt particles. Heat and energy loss during operation is reduced with a thicker coil wire design.
This angle grinder has a lot of intelligent design points. The soft-start feature allows the user to turn this tool on quickly without issues. Make quick adjustments with the tool-less wheel guard design and hit the lock-on/lock-off feature to use the tool continuously.
Dual ball bearings let you transfer power to the gears as efficiently as possible. The result is accurate cutting, grinding, and polishing at any time.
The side handle can be placed on the right or left side depending on the job and your preference.
- Tool-less wheel guard provides easy clamping
- Labyrinth construction seals and protects motor
- Extra-large paddle switch
- Gear housing easily rotatable
- Thicker coil wires reduce heat
- Soft start for smoother start-ups
- Can run too hot at times
- A bit heavy for long-term use
3. Metabo 10500 Rpm Professional Angle Grinder
The Metabo (600380420 9-115 Quick) Professional Angle Grinder is a four-and-a-half-inch angle grinder tool that delivers the punch you need for heavy-duty jobs. It has an adaptable motor designed with increased airflow to ensure reliable performance.
The body style is slim, sleek, and easy to maneuver in different spaces with ease. For better handling, this grinder has an integrated non-locking paddle switch.
Quick accessory changes are aided through the M-Quick tool-free system built directly into the grinder. You can reduce the amount of time you spend not working.
The gear housing rotates for more flexibility and efficiency. You can change the position of the side handle on the gear housing to suit your application and needs.
This smaller 4.5-inch angle grinder tool is also very safe for users. There is a slip clutch feature that prevents kickback for safer use.
For comfort and more control, the handle has anti-vibration capabilities. You will be able to hold this grinder steady without shaking or knocking yourself off course.
- Made with world-class German engineering
- Gear housing rotates 90-degrees for added flexibility
- Manual, automated, and hybrid assembly systems
- Created out of die cast aluminum
- LongLife design promotes air flow for cooler performance
- S-Automatic slip clutch helps to minimize kickback
- Lacking necessary accessories
- Does not come with a case for easy storage
4. Milwaukee M18 FUEL Angle Grinder With Paddle Switch
For a high-performance, battery-operated 4.5-inch angle grinder, try the Milwaukee 2780-20 M18 model. This angle grinder offers superior technology to control cutting and grinding functions, plus many other applications.
It is equipped with REDLINK PLUS intelligence that helps optimize all of the systems and improve your knife-making hobby.
This simple grinder uses a REDLITHIUM XC5.0 battery pack that provides almost two times more run-time than other types of grinders. This cordless grinder has similar power and performance to a corded model.
If you are worried about the durability and reliability of an angle grinder over time, this model will serve you well. The metal housing and gears are all designed to be extremely durable.
This tool has an intelligent, commonsense design that features a paddle switch to make operation easier and more efficient.
All of the accessory changes on this grinder can be made without the need for extra tools. You can get back to your DIY projects and work-related tasks before you even blink an eye.
- Features a brushless motor for longer tool life
- Optimized performance through REDLINK PLUS intelligence
- 100% tool free accessory changes
- Paddle-switch design for increased comfort
- More runtime thanks to upgraded battery pack
- Incredibly durable metal housing and gear system
- Must recharge batteries to maintain performance
- Does not come with batteries
5. BLACK+DECKER BDEG400 Angle Grinder
Use the stable power of the BLACK+DECKER Angle Grinder Tool, 4-1/2-Inch, 6 Amp (BDEG400) for a wide range of applications that require a combination of speed, power, and precision.
The metal gear case of this 4 1/2 angle grinder can hold up during heavy-duty projects.
You do not need to mess around with tools or completely disassemble the tool to put on a different disc accessory. This 4.5-inch angle grinder has a narrow design with a comfortable side handle.
You can easily control the direction of the wheel with this handle to keep you steady. You can adjust the handle to suit your preference from three different positions.
In the case of an emergency, there is a one-touch release switch that powers the tool down quickly. A safety release switch is important to protect you from the potential dangers of an accident with this fast-spinning tool.
This tool also comes with a 2-year limited warranty to cover certain issues with the components.
- Narrow body for a more comfortable grip
- Powerful motor for longer use
- Spindle lock for easy accessory changes
- Metal gear case is more durable
- Side handle has three possible positions
- Comes with different accessories
- Manual could offer more information
- Made partially with easy-to-damage plastic
6. Metabo HPT 6.2-Amp Compact Angle Grinder
The Metabo G12SR4 4-1/2-Inch Angle Grinder has enough power to make short work of tough grinding and polishing jobs. You can even use it for sharpening tools or cleaning metal with the amount of power in its motor.
This angle grinder is ideal for long hours of work because you can worry less about overloading or burning out the tool. It comes outfitted with a trigger lock feature. This lock can be used for continuous operation to make it more comfortable.
This angle grinder has a left-mounted slide switch. This switch is a quick-off safety feature. In case you need to turn the tool off during an emergency, you can flip this switch.
If you want to remove a disc or accessory, you can press the spindle lock on the side of the head for an easy switch.
A side handle makes this tool easier to control despite its moderate weight. The side handle is removable and can be used on either the right or left side. It is also canted forward to help better maneuver the tool where you want it to go.
The entire angle grinder, including its cord and several accessories, can fit into a convenient storage case. This case also has a handle for simple transportation.
- Spindle lock make accessory changes quick
- Side handle is removable and forward-canted
- Comes with carrying case
- Trigger lock-on feature for continuous use
- Includes five abrasive wheel accessories
- Quick-off switch for safety
- On/off switch location inconvenient
- Must be near plugin to use
7. DEWALT DWE402K 11-Amp Angle Grinder
The incredible power to weight and size ratio sets the DEWALT Angle Grinder Tool (DWE402K) apart from many other models.
This 4 1/2 angle grinder features exceptional power and control, with a variety of special innovations built into its design.
There is a dust ejection system that provides more durability to the motor. This system is designed to push out any damaging debris that tries to come into the inner parts.
The brushes are also a special oversized type that last two times longer. The spiral bevel gears give you peace of mind that the transmission will have a long life.
You can get this tool to work for you without struggling like some other power tools. The guard has a one-touch design that allows the user to rotate it 360 degrees.
The wheel has a quick-change release button so you can remove and replace discs without tools, too.
A more ergonomic side handle lets you be more precise on projects. The handle has a very small gripping surface that lets you easily grab onto it. You can have the most comfort while using this tool.
- Quick-Change wheel release feature for easy replacement
- Comes with convenient kit box
- No lock-on for user protection
- Features one-touch adjust guard system for efficiency
- Dust Ejection System is more durable
- Comes with matching wheel flanges
- A bit heavy for a compact angle grinder
- Must purchase extra accessories
8. Bosch 1375A Angle Grinder
Handle large and small tasks with the Bosch 4-1/2-Inch Angle Grinder 1375A and its small, lightweight design. Every inch of this grinder for metal comes with features added for easier operation.
It has moderate power and can reach speeds up to 11,000 RPM with no load. Plus, it has a motor designed with a small field diameter.
It is possible to do a lot more tasks with superior precision and ease if you have this 4.5-inch angle grinder. A burst-protection guard ensures user safety and security.
This is an exceptionally durable angle grinder that also has a compact, maneuverable build. It is coated in epoxy so that abrasive materials do no damage.
The sealed switch makes it so that debris cannot enter the delicate part of the machine where the motor and gears sit.
A significant area of convenience on this grinder tool is its Service Minder Brush System. This system is a unique way to monitor brush life. The tool itself will shut off if maintenance is necessary.
Another important feature is the side handle allows you to control the direction of the tool. You can even place it on either side to fit your needs.
The top handle is made to be more ergonomic for improved control while handling the tool.
- Designed with small field diameter for easier operation
- Comes with Service Minder Brush System
- Tool is coated with epoxy to prevent debris damage
- Top handle is placed to provide more comfort
- Lock-on side switch allows for easy continuous operation
- Side handle allows for two positions
- Does not come with variable speed settings
- Needs plug in to operate
9. CRAFTSMAN CMEG100 6-Amp Angle Grinder
The CRAFTSMAN Small Angle Grinder Tool 4-1/2-Inch, 6-Amp (CMEG100) is capable of plenty of applications, ranging from heavy-duty to precision tasks.
The spindle lock is a useful feature on this four-and-a-half-inch angle grinder that lets you change wheels with ease and with no complicated disassembly.
Because this tool is designed especially for grinding applications, it arrives with several grinding-related accessories. This tool comes with both a grinding guard and a grinding wheel.
Beginners will find this tool easier to handle than some other options. It has a tool-free guard, which can be used to make quick adjustments to the tool direction or spark direction.
The side handle can be repositioned to better serve the application and the user. If you are left-handed, you can place it so that you can better control the tool. The handle is overmolded and specially contoured for more comfort.
This high-performance 4.5 angle grinder is compatible with a convenient organization system. The VERSATRACK wall organization system is a set of hooks and accessories that can be purchased alongside this angle grinder.
You can store the tool safely on hooks on the wall when it is not in use. Take advantage of the 3-year limited warranty in case you need help with a repair or part replacement.
- 3-position handles for different applications
- Tool-free guard for quick adjustments
- 3-year limited warranty
- Overmolded handle is more comfortable
- Compatible with VERSATRACK organization system
- Easy wheel changes with spindle lock design
- Too small for larger projects
- Needs plug in to operate
10. PORTER-CABLE 6-Amp 4-1/2-Inch Angle Grinder Tool
Transform your workspace completely when you add the PORTER-CABLE Angle Grinder Tool to your lineup of power tools.
This 4.5-inch angle grinder is designed to be powerful, durable, and reliable when it comes to a variety of applications. And you can count on it to keep you safe when it counts.
There are multiple handle positions possible with this grinder tool. You can choose to put it on the left, right, or top. Test the position to ensure that it will provide the optimal control you need to carry out a task.
Other features that ensure ease of use include the integrated spindle lock and tool-free guard change. The spindle lock is present so that you can quickly change a wheel and get a new one put on with only one wrench.
And the guard can be changed without any tools for quick repositioning.
Other aspects of this tool enable a smoother start for safer operation. A soft start setting is built into the machine, which makes it start up smoothly and slowly to reduce kickback.
And a no-volt switch prevents accidental restarts. If there is a problem with the power source, the grinder will not automatically turn back on if it is still in the “on” position.
- Multiple handle positions
- Soft start for a smoother start
- Tool-free changes for easy repositioning
- Integrated spindle lock makes accessory changes fluid
- No-volt switch to prevent accidental restart
- Comes with 3-year limited warranty
- Must be near plugin to use
- Does not come with carrying case
Things to Consider Before Buying
Power is measured in wattage and input power is shared in AMPs for corded models. An angle grinder needs to provide enough power to get through big projects and to operate for extended periods.
For example, a 4-1/2 grinder will not need to have as many AMPs in its motor, because they are focused on less heavy-duty applications.
RPM, or revolutions per minute, is a measure of the speed of an angle grinder tool. The higher the operating speed, the better results you will get cutting or grinding different materials.
A 4-1/2 inch angle grinder will have a high no-load RPM because it is not as big. You can achieve faster cutting speeds without as much risk to your safety as with larger discs.
Smaller discs are associated with more precision tasks and work that requires a more delicate touch. Larger discs are used for heavy-duty tasks.
If you have an angle grinder that is designed for 4-1/2 discs, you will not be able to fit a 9-inch disc on that tool.
There is sometimes a little wiggle room, where you can go down or up to half an inch. For example, some models work with both 4-1/2-inch and 5-inch discs or 4-inch and 4-1/2 inch discs.
A model of angle grinder without brushes in the motor will require a little less regular maintenance. The brushes in the motor will eventually wear out if you use your tool enough.
If you neglect to change these brushes, you can end up irrecoverably damaging your grinder.
The spindle on an angle grinder refers to the shaft that comes out of the end of the tool at a 90-degree angle. This spindle is what you attach a disc or other accessory onto.
Typically, the standard spindle thread on grinders is 5/8 inch diameter with 11 threads per inch.
You only need to worry about the spindle or arbor size on your grinder if you want to mix and match accessories. Check to make sure the disc can be installed safely on your grinder model before you use it.
An angle grinder for everyday work and different applications needs to have basic safety features, such as emergency off switches and handguards.
Safety is important when working with these kinds of dangerous tools that can be uncontrollable under the wrong circumstances.
Check for safety features that control kick back and turn the motor off in the event of a bind-up event.
You do not want to deal with a stuck wheel while the motor is making the machine spin the accessories at high speeds.
Comfort and Control
Comfort and control are two essential features to look for in any grinder, including 4-1/2 models. You will not enjoy the experience of operating an unwieldy power tool very much.
It is easier to handle a comfortable grinder, and you will most likely make fewer mistakes during operation.
Seek out angle grinders with multiple handles, especially ones that can be repositioned. These handles are most effective when they are on the side or rear of the tool.
Also, consider anti-vibration technology or over-molded grips on handles.
Features that make it easier for a user to grab the handle will offer improved control for projects that require precision.
Drive diameter relates to the diameter of any disc for the tool. This number is the smallest outside diameter, which means it is the part that comes into contact with the piece of metal you are working on.
Consider the intended use of the angle grinder before you decide what drive diameter you need. Some angle grinders will only be able to fit a certain size of drive diameter, similar to the disc size.
Electric Power Source
You can buy an angle grinder that is powered by electricity, battery, or pneumatic power. Electric-powered are the most popular options for power sources.
An electric power source is the most reliable power option you can have with this type of power tool. Consider models that have a decent cord length in case you need to use them at a distance from your plug-in location.
Price and Warranties
Angle grinders are available at all price points. Certain brands are more affordable options that offer the right features without the expense of other brands.
If you spend a lot of money on a tool that you cannot easily use, it will not be worth it in the end.
Of course, if you are interested in a respectable warranty, you will need to find a popular name brand. Angle grinder models from Craftsman and DeWalt are examples of tools with excellent warranties.
Uses of a 4-1/2 Angle Grinder
There are many useful applications for a 4 1/2-inch angle grinder. This type of grinder tool is very popular in DIY projects and for commercial use.
The size of the disc works excellently for more precision work that requires a light touch, which includes cutting metal and sharpening tools.
Grinding and Polishing Metal
Grinding and polishing metal is the most important application of an angle grinder. Different tools can work to smooth or flatten pieces from a metal workpiece.
Sanding metal is a process that can smooth out imperfections and clean up the entire look of a piece of metal.
Plumbers often use a four-and-a-half-inch angle grinder to cut through small pipes. Welders also often need to use a grinder tool to clean up their work.
Cutting metal is a common use of a grinder because it requires a strong enough tool that will not damage the metal.
Paint and rust can be removed without a lot of physical labor using an angle grinder tool. A special accessory can be outfitted to the tool so that the piece of metal is not destroyed in the process.
You can use plastic stripping discs to remove paint and other coatings on metal, or metal cleaning wheels to get rid of caked-on rust.
If you have dull blades on tools, an angle grinder can help restore their edge. Axes, chisels, and even lawnmower blades become dull and useless over time.
A four and a half-inch grinder is a useful tool option because it can handle this kind of precise task. You want to sharpen the tools without ruining the cutting angle.
A 4.5 angle grinder makes a useful tool for different masonry projects, including cutting stone and tile. You will need a special wheel that is designed to make straight cuts.
You can cut material to use in landscaping projects or flooring upgrades.
Attaching/Using a 4-Inch Blade on a 4-1/2 Angle Grinder
1. Choose Your Accessory
If you are using a size down from the 4 1/2 grinder, you will need to ensure that the 4-inch blade has the proper arbor size.
2. Hold Down Lock
Press the wheel lock button down completely. You should then be able to turn the 4 1/2 wheel until it locks into place.
3. Grab the Wheel
While wearing gloves, grab the wheel and turn it counterclockwise. You will feel the flange release.
4. Disengage the Wheel
The flange needs to be carefully threaded off. Do not rush this step.
5. Grab New Wheel
Once the 4 1/2 wheel is off, you can grab your 4-inch size disc. You will complete the previous steps in reverse.
6. Thread Flange
Take the flange of the new wheel and carefully thread it onto the tool.
7. Turn Wheel Clockwise
Once the flange is engaged, you can turn the wheel clockwise until it locks into place on the tool.
8. Engage the Lock
Before you can use your new disc, make sure to press down the button lock to keep the wheel attached to the grinder. You are ready to go.
Safety Considerations when Using a 4-1/2 Angle Grinder
The main safety consideration you need to take when operating a four-and-a-half-inch grinder is to have the right gear. You need to protect your face, hands, and ears from long-term damage.
Remember to have thick gloves, sturdy safety glasses, and ear protection. If you are working with certain abrasive materials that can become airborne, consider wearing a face mask, too.
Angle grinders naturally produce plenty of sparks when they come into contact with a metal workpiece. Wear clothing that is not flammable and stay clear of other flammable objects nearby your workstation.
Ensure that the wheel guard is turned away from you or any people near you.
At the very least, your angle grinder model should also come equipped with basic safety features. A spindle lock keeps the wheel safely locked into place on the tool during operation.
Many models also have a switch that requires the user to press down before they can start the tool. These features help prevent dangerous situations in which the tool starts accidentally or becomes out of control.
Are 4.5” Angle Grinder Discs Universal?
No, a 4.5″ angle grinder disc is not a universal accessory. You should not attempt to use this size disc on a grinder meant for smaller discs.
The tool will most likely not be able to handle the larger size and it will spin too fast for you to use safely.
You can potentially use the 4.5″ inch disc on an angle grinder designed for 5″ discs. You should always check the manual of your angle grinder before you attempt using any accessory with it.
You can do damage to the tool or cause an accident that can harm you or others.
If your work requires a powerful angle grinder designed with exceptional functionality, the DEWALT DWE402 4-1/2-Inch angle grinder provides everything you need.
This tool comes with one-touch guard rotation capabilities, a dust ejection system to prevent dust build-up and damage, and auto-off brushes.
These features work together so that you can focus more on your workpiece and less on playing around with your grinder.
The best 4-1/2 inch angle grinder is the model that will last through every project and task you throw at it. You need a power tool that can hold up to hours of cutting, grinding, and polishing without giving out.
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