Jun 20, 2020

Top 10: Best 4 1/2 inch Brushless Angle Grinder Reviews

Whether you’re constructing a steel building or restoring that classic car, you know the importance of having the correct tools on hand. One that you’ll find essential is a 4 1/2 inch Brushless Angle Grinder. It’s the ideal tool for debarring metal, removing rust and corrosion, or cutting through plate, round, and bar stock.

 It’s versatile enough to be utilized with a workbench and vise, or freeform. The real challenge here has nothing to do with realizing the utility, flexibility and value of an angle grinder, but finding the best cordless angle grinder for your money and we’ve done all the work for you.

There is a range of manufacturers all competing to bring the top cordless angle grinder. Each model has a range of useful features, but some are better suited for certain tasks than others. So to help you make the better purchasing decision we have put together a list of the Best 4 1/2 inch Brushless Angle Grinders for the year 2020

10 Best 4 1/2 inch Cordless Angle Grinders 2020

  1. WEN 94475 7.5-Amp 4-1/2-Inch Angle Grinder

Best 4 1/2 inch Cordless Angle Grinder
WEN 94475 7.5-Amp 4-1/2-Inch Angle Grinder

Adjustable wheel guard

This grinder comes packed with accessories, including three grinding wheels, a reversible auxiliary side handle, an adjustable wheel guard, and a compact carrying case. The lightweight design weighs in at a mere 4 pounds to limit fatigue during long days on the grind.

Lock-on side switch

The lock-on side switch snaps into place to keep the machine running without frequently holding your thumb down on the trigger.

The reversible handle can be attached to either the left or right side of the grinder depending on the user’s preference. The 7.5-amp motor produces up to 11,000 RPM, powering through rust, chains, pipes and more.

5/8-11 UNC spindle

This angle grinder also features a 5/8-11 UNC spindle that accepts wheels with both 5/8 and 7/8-inch arbors. And, because it’s a WEN product, your 4-1/2-Inch 7.5-Amp Angle Grinder comes backed by a two-year warranty, a stocked inventory of replacement parts and much more.



  • 5-amp motor generates up to 11,000 disc rotations per minute
  • Lightweight 4-pound body
  • Reversible auxiliary handle
  • Lock-on side switch


  • The switch may be difficult to use for some


  1. Metabo HPT Angle Grinder

Metabo HPT Angle Grinder, 4-1/2-Inch, 18V Cordless
Metabo HPT Angle Grinder

Lightweight and compact

The Metabo angle grinder is lightweight, compact, and cordless.  It comes available as a tool body only, and it is compatible with all Metabo HPT 18V Lithium Ion slide-type batteries. The grinder can cut into rebar or pipe, groove stone or concrete, or grind metal and masonry.

Small grip diameter

The G12SR4M 4 1/2 inch Angle Grinder gets rid of casting fin, finishes various types of steel, bronze and aluminum materials and castings, grinds welded sections, sections cut by means of an acetylene torch, synthetic resins, slate, brick and marble.

With its small grip diameter, high output and overload durability, it offers great performance.



  • High torque motor
  • Over-current protection circuit
  • Zero voltage safety reset
  • Lightweight, compact and cordless


  • Difficult to lock device


  1. KIMO 4 1/2 inch Brushless Angle Grinder

Best 20V Brushless Cordless Angle Grinder

KIMO 4 1/2 inch Brushless Angle Grinder

Brushless motor

What can you do when you are not close to a wall outlet, or working in a tight, confined area? Going cordless is certainly a smart choice. Corded grinders are typically more robust, yet are noisier, and less versatile.

KIMO has designed this irreplaceably convenient cordless one with battery power for your quick job without getting extension cords out. KIMO angle grinder has a lot of standout features, but key among them is the brushless motor.

Thanks to the all-copper and premium magnet, the operation becomes more stable and smoother and many professionals and DIYers are heading to brushless motor to enjoy the 53.5% longer runtime and much more efficient experience.

Rubberized and ergonomic 2-position grip handle

For over 25 years, KIMO has made great progress in 1,000-Charging Cycle Test that guarantees each KIMO battery is fairly powerful, and lives longer than before.

Go with KIMO, and you can enjoy, and accomplish more than you ever expected. The9000 RPM motor delivers higher power for grinding metal, and cutting tile, rebar and concrete.

The rubberized and ergonomic 2-position grip handle increases comfort on the job for any workshop, service garage, auto repair, or home hobbyist.

Metal cutting wheel

It is difficult to determine market gimmick from the actual performance features that matter but KIMO hopes to help with that.

A simple one-click order to get the most valuable tool kit, and let them prepare any accessories you require.

Each Cut-Off Tool Kit features 10*Sandpaper; 5*Metal Cutting Wheel; 5*Grinding Wheel; 1*Wood Cutting Wheel; 1*Hook & Loop Backing Plate; 1*Carrying Bag; 1*Fast Charger; 1*Battery; and 1*Wrench.



  • Dual position auxiliary handle
  • Compact body and ergonomic handle
  • Powerful brushless motor
  • Optimized ventilation system


  • Has an extremely low battery capacity


  1. PORTER-CABLE 20V MAX Angle Grinder Tool

Best 20V MAX Angle Grinder ToolPORTER-CABLE 20V MAX Angle Grinder Tool
High performance motor

The PORTER CABLE PCC761B 20v MAX Lithium Bare Cut Off/Grinder consists of a high-performance motor that produces 8,500 rpm for aggressive cutting, removal and finishing.

The cast metal gear housing helps dissipate heat during extended utilization and a spindle lock that allow for quick and effortless wheel changes.

3-position side handle

The wheel diameter is 4-1/2 inches and the handle is contoured and over molded for optimal increased comfort, along with a 3-position side handle that helps to provide control in multiple positions.

A tool free guard makes guard adjustments swift and effortless. This cut-off tool is part of the 20V Max System which is a high performance cordless platform. (This is a bare tool item – battery sold separately).



  • High-Performance Motor produces 8,500 rpm
  • Cast metal gear housing
  • Spindle lock for quick and easy wheel changes
  • 3-Position Side Handle
  • Part of the 20V Max System


  • Underpowered so you will probably run through batteries


  1. Ryobi P423 18V One+ Brushless 4-1/2″ 10,400 RPM Grinder

Best 18V One+ Brushless 4-1/2" 10,400 RPM Grinder and Metal Cutter w/ Adjustable 3-Position Side Handle and Onboard Spanner Wrench
Ryobi P423 18V One+ Brushless 4-1/2" 10,400 RPM Grinder

Cordless grinder

Whether you’re working on a plumbing job or are cutting metal down to size for a garage or other home improvement project, you should keep the Ryobi P423 in mind.

This, cordless grinder can slice through a variety of metals with ease and accuracy.

Onboard spanner wrench

With a motor driving the grinding wheel up to 10,400 RPM (No-load), you’re sure to cut through PVC, piping, welded metals, and much more.

While a 4-1/2″ wheel is included for day to day diy applications, you can always replace it. Replacement is effortless with the inclusion of an onboard spanner wrench.

You can keep multiple wheels on hand for whatever job comes up, and you can have them replaced in seconds.

Adjustable side-mounted handle

Beyond the powerful motor, there are a variety of features that offer you optimal control.

An adjustable side-mounted handle switches between 3 positions to provide you with maximum leverage wherever you work. The grip zone over mold lets you maintain a tight hold, even in slippery conditions and even the guard is adjustable, letting you work from the ground or on a ceiling without too much exposure to sparks.

No matter the application, if you’re cutting through metals, the Ryobi P423 grinder will serve you well.



  • Comfort grip handle
  • Tool-free guard adjustment
  • 18V cordless power tool
  • Grip zone over mold lets you maintain a tight hold


  • May drain battery fast


6. Makita XAG04Z

Best 18V LXT Lithium-Ion Brushless Cordless 4-1/2” / 5" Cut-Off/Angle Grinder
Makita XAG04Z 18V LXT Lithium-Ion Brushless Cordless 4-1/2” / 5" Cut-Off/Angle Grinder

Mikita XAG04Z will be a flawless solution to issues you may face on a remote job site. It is a versatile tool and perfect for DIY jobs and small repair works.

This cordless angle grinder is smaller in size in comparison to corded grinders. That small size makes it a flawless tool to grind, cut, and sand object at very narrow areas.

It is equipped with tough Mikita discs. You can bank on this grinder for flawless cutting of tiles, wood adjusting, metal angle grinding, sanding, and other similar jobs.

Mikita XAG04Z is equipped with a brushless motor which may cause moderate heating. It does not require time-consuming maintenance and therefore it can be trusted for long working hours.

You will not waste time on brush cleaning because it moves dust and debris away. This cordless grinder can work at different speed. You can easily adjust the speed and torque of the disc and finish the work in a flawless way.



  • You can change the disc without using any tool.
  • This cordless angle is equipped with an ergonomic handle which allows the user to handle the tool in a convenient way.
  • You get a smart lock which automatically stops the disc. Its blade works quite preciously.
  • Equipped with a powerful battery that makes it capable of operating longer.


  • This angle grinder lacks speed adjustment mechanism and you do not get a manual to follow instructions.


Final words:

Mikita XAG04Z is a great tool for outdoor jobs. You will not need a power outlet to operate it because it is a cordless grinder. It is powerful and suitable for small jobs.


7. Hitachi G18DSLP4:

This cordless angle grinder is powered by an 18V Lithium Ion battery. If your budget is not too high and still you want a versatile angle grinder, you should buy Hitachi G18DSLP4. This grinder can fit in areas which are literally hard to reach.

Its ergonomics allows the user to place it in narrow areas and finish the required jobs without putting extra pressure. This is a lightweight grinder and you can easily maneuver it by one hand.

This 4 1/2 inch Brushless Angle Grinder is equipped with a powerful motor which produces high torque without destabilizing the tool. You can bank on this tool for heavy duty jobs on remote sites. It can operate longer and it will never get too hot.

Its 18V Lithium-ion battery powers this tool for a very long time. You can take this angle grinder to remote work sites and use it without charging the battery time and again.



  • It is a powerful cordless grinder which can easily cut through tough concrete boards and metal.
  • It is lightweight and ergonomic to reach narrow locations.
  • You can easily access brushes from outside and remove them to fit new brushes.
  • Sturdy construction and durable parts make it an ideal choice for professionals.


  • Even though Hitachi claims this cordless angle grinder can operate for a long time at one charge, the users have revealed that the battery discharges quickly.

Final words:

Hitachi G18DSLP4 is suitable for both heavy duty and light duty jobs. Even though it is not as powerful as its corded counterparts, it is user-friendly and perfect for the DIY cutting, sanding, and repair works.


8. DEWALT DCG413B Brushless Cut Off Tool

Dewalt 4 1/2 inch Brushless Angle Grinder
DEWALT DCG413B Brushless Cut Off Tool

The Dewalt 4 1/2 inch Brushless Angle Grinder is another tough grinding tool powered by a 20V battery. It is a powerful solution for grinding and cutting jobs because this tool is equipped with a brushless motor that delivers up to 9,000 RPMs.

Its low vibration motor performs 57% better than brushed motors. This power tool is equipped with various safety mechanisms which protect the operator against accidental cuts and injuries. This angle grinder features a paddle switch which allows you to stop the spinning disc within a few seconds.

It is a smart power tool, which means it will stop automatically in case the disc is prone to bent. This kickback brake system allows you to prevent the disc against the potential damage and save extra bucks.

There are guards located around the disc to prevent debris from flying around. It is lightweight and that’s why you can easily manage grinder’s movement at any angle.



  • Equipped with a brushless motor which performs way more efficiently than a brushed motor.
  • The motor generates impressive 9,000 RPMs, which is much better than many cordless angle grinders.
  • Auto stop feature to protect the spinning disc against damage.
  • Backed by a 3-year warranty and 90-day money-back guarantee.


  • You cannot recharge the battery immediately because it gets hotter after running this grinder for a long time.


9. Milwaukee 2780-20

Milwaukee 2780-20 M18 Fuel 4-1/2"/5" Pad, Bare
Milwaukee 2780-20

Sturdy construction and flawless performance has made Milwaukee 2780-20 a favorite angle grinder of many professionals. It is an affordable solution for the DIY projects.

All the components of this grinder are fitted flawlessly and designed to offer a long and maintenance-free service. Its ergonomic shape and rubberized grip allows the operator to hold this grinding tool tightly and maneuver it perfectly.

Its brushless motor requires no maintenance because it does not generate too much heat when in operation. You can bank on this tool for industrial use, but it is not as powerful as corded angle grinders. It can produce up to 8,500 RPM for a long time until the battery is charged.

Sanding and cutting tough objects will become an easier task for you because of vibration-free operation of this grinder. Reduced vibration also allows the operator to work longer without experiencing fatigue and hand strain.

You can use a built-in lever to change the disc and thus you will not need an additional tool to change the grinding and cutting discs.



  • Starts smoothly without putting any kind of pressure on the motor.
  • Equipped with a reliable braking mechanism.
  • Motor changes the noise as the load increases.
  • Disc guard protection is installed to prevent the operator against injuries and debris flying into the eyes.


  • The paddle switch is quite stiff and that’s why many users have found it difficult to use.

Final words:

Milwaukee 2780-20 is a reliable, durable, and affordable cordless angle grinder that comes with a powerful battery. You can bank on this tool for long running grinding, cutting, and sanding operations but its paddle switch will cause some troubles.



A 4 1/2 inch Brushless Angle Grinder is one of the most useful power tools around, with an extremely wide range of applications. That’s why a good angle grinder can effortlessly find a place in the toolbox of any well-prepared contractor or DIY enthusiast.

Some buyers just make use of a grinder for to clean up metal before welding, and also to clean the actual weld when it has been made. Any of the cordless angle grinders on our list will do that job nicely. Your selection will basically come down to which brand you like the best.

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