Best 4 1/2 Angle Grinder of 2020 Complete Reviews with Comparisons

By Tool Scout | Angle Grinder Reviews

Best 4 1/2 Angle Grinder

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Using a wire brush to polish rusted materials or a hacksaw to cut light metalwork is certainly feasible, but grabbing hold of a high-quality grinder to tackle either task will make life a hell of a lot easier. The 4-1/2 inch angle grinder is a brutal handheld power tool that can cut through anything from metalwork, mild steel, brickwork, and even cut tiles.

But, that said, picking the right grinder to conquer these tougher materials and slice your way through them largely depends on the angle grinder you choose. This means that finding the right match might not be as easy as you might think, at least if you’re concerned about more than just pricing.

So, let's take a look at our top angle grinders to understand what we’re talking about and what 4 1/2 angle grinder is right for you.

Comparison Chart

DEWALT DWE402 4-1/2-Inch Angle Grinder

Metabo WP9-115 Quick 8.5 Amp 10,500 rpm Angle Grinder

Bosch GWS10-45P Angle Grinder with Paddle Switch, 4-1/2″

CRAFTSMAN CMEG100 ​4-1/2-Inch Angle Grinder 

Angle Grinder, GALAX PRO 6 Amp Grinder Tool

Best 4 1/2 Angle Grinder Reviews

DEWALT DWE402 4-1/2 Inch Angle Grinder 

Kicking things off is the hugely popular Dewalt DWE402. The DWE402 is equipped with a ferocious motor and is also a super lightweight grinder, so navigating this little corded yellow & black beast is a breeze.

The Dewalt DWE402 also comes at an affordable price point. While it's not the cheapest 4-1/2-inch angle grinder on the market, the value you're getting and the dependability that Dewalt constantly delivers with their tool range is simply priceless. 

Review

The Dewalt DWE402 angle grinder has plenty of power for a lightweight tool. Its next-generation 11 amp motor is powerful and reliable. The motor can generate up to 11,000 RPM under no load. The DWE402 really is built to be abused. There isn't much that you can't put in front of the DWE402 that it will not simply devour with ease.

What’s even better is that this model can accommodate 5/8” and 7/8” grinding wheels, thanks to the design of the arbor adapter. But where the Dewalt DWE402 truly shines is in the comfort and ease of use department.

The DWE402 is fitted with a very comfortable and nicely sized auxiliary handle. This means that you can use it on either side while also adding some extra balance. The slim body structure should help limit fatigue and Dewalt seemed to have paid considerable attention to the ergonomics of the DWE402, as grips on both the body and auxiliary handle are brilliant. 

Secondly, the DWE402 runs relatively smoothly when compared to other 4-1/2 inch grinders, and you'd honestly have no idea that Dewalt's hulking 11 amp motor generated 1,400 watts while in-hand. You might also appreciate the fact that there’s also a lock-on switch that is used to keep the disc rotating continuously for as long as you need it.

The DWE402 operates via a paddle switch system that is located on the body of the grinder. By flicking the safety switch and pressing the paddle switch, this 4-1/2-inch grinder comes to life like a deer in heat. The excellent design of the DWE402 is something to be marveled at with its slim ergonomic structure and superbly positioned paddle switch Once you do have this thing in-hand, you'll truly appreciate the exceptional build-quality and be literally astonished by the power this 4-1/2-inch grinder possesses.

Aside from the performance and design, another cool feature with the DWE402 is the Dust Ejection System. This unique feature provides increased longevity for Dewalt's burly 11 amp motor by dispersing any potential dust or debris that could enter the tool. This Dust Ejection System will help prolong the lifespan of the motor by protecting the brushes and also provide greater airflow over the motor keeping it much cooler while under heavy load.

And, to sweeten the pot further, Dewalt's also ads their signature hard carry case and handy wrench so that you can replace discs faster and safer.

PROS

  • Professional grade angle grinder at an affordable DIYer price tag
  • Dewalt's One-Touch Guard™ allows you to quickly rotate the guard 360°
  • Increased motor performance and longevity with Dust Ejection System™
  • Best ergonomic design in it class for a 4-1/2 inch angle grinder
  •  Awesome paddle switch set-up with safety lock-off eliminates misfires 

CONS

  • Grounded cable option does not come standard
  • Nowhere on the angle grinder to store the wrench 

Metabo WP9-115 Quick 8.5A 4-1/2 Inch Angle Grinder

The Metabo WP9-115 has one of the most powerful motors in its class. It’s a 4-1/2 angle grinder ideal for material removal, polishing, and even cutting through tile, metal or concrete, provided you’re using the appropriate discs.

The WP9-115 has long received raved reviews from loyal Metabo users, and rightfully so. This simply is one of the best angle grinders available and after wielding the WP9-115 for the first time, you'll no doubt be left with the same lasting experience.

Review

The WP9-115 comes with a bunch of features and functions unique to Metabo. One of the most important features is the Metabo S-Automatic safety feature. This is basically a safety slip clutch which improves operational control and reduces the risk of kickback. Something you’re likely to run into when cutting through high-density wood.

Another cool feature is the Metabo Quick System. This is the disc change system which renders the classic wrench tool obsolete. All you’ll have to do is press a button to remove the disc.

Durability is another important hallmark. The build quality is superior or at least close to that many mid to premium-priced 4-1/2 angle drivers. The durability is also noticeable when it comes to the motor, which has roughly 20% more overload capacity.

A dead-man paddle switch is also part of the design. This facilitates a quick shutdown of the motor if you release the switch. One more thing that might interest you is the fact that the WP9-115 can run on both AC and DC.

This does a great deal for both portability and overall utility. And, the fact that the motor boasts an optimized airflow and cooler operating temperatures makes the WP9-115 great to use in harsh working and environmental conditions.

PROS

  • Exceptional build quality from Metabo's Germany engineering department
  • Fitted with an anti-vibration handle to increase user run-time & productivity
  • High torque S-Automatic™ mechanical clutch that greatly reduces kickback 
  • Extremely high output motor with more copper wiring to enhance longevity
  • Tool-free adjustable guard with M-Quick™ disc changing system

CONS

  • On the more expensive side of the spectrum 

Bosch GWS 10-45P 4-1/2 Inch Angle Grinder

The Bosch GWS 10-45P checks all the important boxes for a high-quality angle grinder and then some. Along with the high standard of quality that’s synonymous with Bosch, you can also enjoy a very well-balanced angle grinder that produces limited vibrations.

Review

It’s not often that you can find an angle grinder best suited for both cutting and polishing intricate pieces or hardware or art. The GWS 10-45P delivers on both fronts, mostly due to its vibration control side handle. This reduces the amount of feedback and gives you a very comfortable grip to work with too.

The handle can also be used in two different positions which should let you use the GWS 10-45P with a wider range of techniques. But the versatility doesn’t stop there. The motor is a powerful 10A motor with impressive power.

It’s capable of delivering 11,500 RPM which is nothing to scoff at. The motor also comes with direct-motor cooling, which increases the longevity and overload resistance. Carbon brushes also help improve the durability.

A paddle switch is included, which makes the operation a lot easier and safe. Another cool feature is the Service Minder feature that is present in most Bosch angle grinders. This stops the tool from working if something’s off and maintenance is required.

Of course, ease of use and superior durability are just two of the things that separate the GWS 10-45P from the crowd. What makes it special is its ability to handle all-day operation in your garage workshop, machinery manufacturing, or at the construction or contractor site.

PROS

  • Highly durable carbon brushes that maximize the motors lifespan
  • Fitted with a multi-position paddle switch for enhanced versatility  
  • Built for intense tasks with minimal vibration with its 2-position sturdy handle
  • Enough power to use for extended periods with direct-motor cooling feature
  • Weighs only 4.1 lbs so you can grinder or cut with greater maneuverability 

CONS

  • One of the louder 4-1/2 inch angle grinders on the market 

CRAFTSMAN CMEG100 ​4-1/2 Inch Angle Grinder 

If you’re budget-constrained and you’re in the market for something more affordable, then the CRAFTSMAN CMEG100 4-1/2-Inch Angle Grinder might be a better fit for you.

The CMEG100 comes with a decent amount of accessories and plenty of power to slice and grind your way through a multitude of rough and rugged materials. 

Review

While affordable pricing may be the main high point for many consumers when considering any CRAFTSMAN power tool, there’s more to the CMEG100 than just the enticing low-cost price tag. The CMEG100 makes our list of the best angle grinders not because it generates 12, 000 RPMs with its 6 amp motor, but because it generates 12, 000 RPMs and doesn't break the bank.

Now that we've established that the CMEG100 actually produces a very impressive amount of power for a budget angle grinder, you probably thinking, what's the trade-off? Simply put, it's the build quality of the CRAFTSMAN CMEG100. This grinder has been specifically designed for individuals conducting DIY jobs around the house, not for the daily demands of a construction site.

Now keep in mind, the CMEG100 is by no means inferior in terms of its overall build and design, it just hasn't been engineered for the heavy-duty tasks that the majority of DIY homeowners will never endeavor. It' been created as a brilliant starter option with all the necessary accessories, like a wrench, three-position auxiliary handle, a carbon brush, and one abrasive wheel. The cutting and the grinding disc included with the CMEG100 is fairly durable, so it should keep you going for a while.

A spindle lock is available which will facilitate easier disc changes as well as more control and precision while grinding away excess welding. The contoured over-molded auxiliary handle can be placed on either side or on top. As with all 3-position handle designs, this will help you use a wider range of techniques and work on hard-to-reach areas.

The grinding guard on the CMEG100 has a tool-free adjustment feature that can easily be adjusted unlocking a lever and rotating the guard within seconds. This basic but handy little feature greatly increases productivity as you won't be attempting to locate particular tool to make the required adjustments.

One other noteworthy thing about the CMEG100 is the added benefit of the VERSATRACK Wall Organization System that allows you to neatly rack and stack the grinder utilizing CRAFTSMAN'S hook and accessories that can be purchased separately. Lastly, the CRAFTSMAN CMEG100 comes with a 3-year warranty that is fulfilled in the United States. 

PROS

  • Budget friendly angle grinder that is ideal for DIY jobs and home workshops 
  • Boasts surprisingly good performance for a low-budget grinder 
  • Compact and lightweight as it tips the scales at just 4.1 lbs
  • Comfortable 3-position handle with thick contoured overmolded material
  • Made in the USA and comes with a 3-year limited warranty

CONS

  • Not designed for heavy-duty jobs and can overheat if pushed to the limits

Galax Pro 6A 4-1/2 Inch Angle Grinder

Galax Pro also offers an affordable 4-1/2” angle grinder which keeps the competition interesting. This tool comes with multiple accessories and a good amount of speed and power. It also helps that the build quality is good even though the price tag might not reflect it.

Review

This Galax Pro angle grinder can be used for metal cutting, grinding, as well as on projects involving wood, stone, or tile. It does a particularly fine job at sanding and removing rust due to its high 12,000 RPM speed.

The list of accessories includes a spanner wrench, a protective guard, a cutting wheel, and a grinding wheel. The convenience of using this Galax Pro 6A angle grinder comes mostly from its narrow build, light weight, and ergonomic handle.

That being said, some users may be more impressed by the durability of this affordable tool. Galax Pro uses an innovative venting system that protects the motor from overheating, a situation that might occur in grinding and cutting applications.

All in all, this is a very good alternative for someone that can’t afford a powerful do-it-all angle grinder. And, it should be able to handle even more difficult jobs thanks to the unique duct design and reliable cooling.

PROS

  • Super affordable 4-1/2 inch angle grinder with a powerful 6 amp motor 
  • Multiple accessories included so you can get to work straight away
  • Unique venting system delivering adequate air flow over the motor 
  • Robust enough to cut through tough metal or concrete as it spins at 12,000 RPM
  • Fantastic starter tool for DIY grinding or cutting tasks around the home

CONS

  • Not an established power tool brand and only comes with a 2-year warranty

4-1/2 Inch Angle Grinder F.A.Q.

What is the Best 4 1/2 Inch Angle Arinder?

If we're talking corded angle grinders, it has to be the Dewalt DWE402 4-1/2-Inch Angle Grinder, hands down. It's been long considered one of the best angle grinders by DIY enthusiasts and professional contractors.

The Dewalt DWE402 is the kind of grinder you'll see tucked away in a mechanics toolbox or plugged into a temporary power outlet on a construction site. It really is just that good!

Now if you're more interested in the angle grinders of the cordless variety and want our opinion on what is the best angle grinder without the burden power cords, you really should check out the Milwaukee 2780-20 M18 Fuel Angle Grinder.

It's a complete savage weighing around 5 lbs with the M18 battery connected and generates over 8,500 RPM with its patented Powerstate™ brushless motor.

Can I Use a 4-Inch Blade on a 4 1/2 Angle Grinder?

Affirmative. You sure can use a 4-inch blade on a 4-1/2 inch grinder. As long as grinder disc is compatible with arbor, you can successfully fit a 4-inch blade to 4-1/2 inch grinder. One other thing to consider before you go slapping a smaller disc on a larger grinder is to make sure that the disc you are utilizing is actually rated to withstand the speed of your grinder.

Your typical 4-1/2 inch angle grinder generates around 11,000 RPM and a substantial amount of discs you'll encounter are rated at roughly 13,000 RPM. But, when it comes to 5-inch angle grinders, you're looking at reduced speeds of anywhere between 7,500 - 9,000 RPM. In other words, you can use a small disc on a larger grinder without any concerns about shattering the disc.

One last thing to ponder about using different size discs on angle grinders. If you happen to be using a 5-inch disc for significant about of time, it will eventually become a 4-1/2 inch disc, and a 4-inch disc, and 3-1/2 inch, and so on... you get the idea. 

FINAL VERDICT

It's hard to pick a winner out of this bunch of angle grinders. But if we must, the best angle grinder in the 4-1/2 inch variety would have to be the DEWALT DWE402 4-1/2-Inch Angle GrinderThis 4-1/2 inch grinder with a blistering 11,000 RPM is really ideal for a range of grinding, cutting, and sanding techniques at a relatively low cost.

A power tool like the DEWALT DWE402 has gained a reputation that precedes its self. Once you spend an afternoon grinding and slicing with the DWE402, you'll undoubtedly understand what all the fuss is about.

In Conclusion

Each of the angle grinder reviewed here today has there pros and cons, like any power tool. There's almost always going to be a trade-off when purchasing any tool.

But if you can choose a tool that's within your budget and meets your needs, any annoying nuance we've highlighted or you experience yourself will be an afterthought once become comfortable with the tool. 

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