Find the Best 4 Inch Angle Grinder | Reviews

Find the Best 4 Inch Angle Grinder Reviews

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Looking for a powerful 4-inch grinder? Compare top models, features, and prices before you buy.

You need a 4-inch angle grinder. We get it. Those little jobs around the house or garage quickly turn into big projects without the right power tools. And nothing can cut, grind, and polish like a quality angle grinder.

But with so many models and brands to choose from, how do you find the best 4-inch grinder for your needs and budget? Don’t worry, we’ve got your back. We reviewed and tested the top 4-inch angle grinders on the market today so you can make an informed decision. In this article, we’ll compare power, performance, features, and price across the leading brands.

We’ll break down the pros and cons of each model and reveal our top pick. Whether you’re a DIY warrior or professional contractor, you’ll learn everything you need to know to buy the perfect 4-inch grinder to tackle those jobs with ease. So let’s get started!

Top 5 Best 4 Inch Angle Grinders

Top 5 Best 4 Inch Angle Grinders
Grinder ModelPower (Amps)Speed (RPM)FeaturesProsCons
Makita 9557PBX17.511,000Paddle switch, labyrinth construction, tool-less wheel guardPowerful, durable, dust protectionSlightly heavier
Bosch 1375A6.011,000Constant Response Circuitry, spindle lock, restart protectionMaintains speed under load, safety featuresCan be less powerful than some
DEWALT DWE40211.011,000Dust-ejection system, two-position handleHigh power, clears debris, comfortable gripCan get hot with extended use
PORTER CABLE PC60TPAG7.011,000Paddle switch, three-position handleLightweight, versatile grip optionsMay lack power for heavy jobs
SKIL 9295-016.011,000Slide switch, spindle lockBudget-friendly, easy wheel changesBasic features, may not be as durable
FEATURED
Makita 9557PBX1 4-Inch Angle Grinder

Makita 9557PBX1 4-Inch Angle Grinder

  • This workhorse from Makita is a great all-around grinder for most DIY tasks. It has a powerful 7.5 amp motor that spins the wheel at up to 11,000 RPM. The grinder is compact, weighing only 4.5 pounds, with an ergonomic handle and trigger switch for comfortable operation. It includes a grinding wheel, cutting wheel, and wheel guard to get you started. For the power and performance, the Makita 9557PBX1 is a great value.
FEATURED
Bosch 1375A 4-Inch Angle Grinder

Bosch 1375A 4-Inch Angle Grinder

  • For a high-quality, durable grinder from a reputable brand, the Bosch 1375A is a top choice. This model has a sturdy 6 amp motor that provides plenty of power for most cutting and grinding jobs. It has a tool-free guard assembly for quick adjustments, as well as a paddle switch with lock-on for continuous use. The Bosch 1375A is built to last and is a good investment if you want an angle grinder that will stand up to frequent use.
FEATURED
DEWALT DWE402 4-1/2-Inch 11-Amp Angle Grinder

DEWALT DWE402 4-1/2-Inch 11-Amp Angle Grinder

  • DEWALT’s DWE402 model is a step up in power, with an 11 amp motor that spins the wheel at up to 11,000 RPM. This grinder has some nice features for the price like a one-touch guard, dust ejection system, and spindle lock for quick wheel changes. The DEWALT grinder is a great all-around model for cutting, grinding, and polishing metal. It provides plenty of power but still handles well for most users.
FEATURED
PORTER CABLE PC60TPAG 7-Amp 4-1/2-Inch Angle Grinder

PORTER CABLE PC60TPAG 7-Amp 4-1/2-Inch Angle Grinder

  • For occasional use, the PORTER CABLE PC60TPAG provides good performance at an affordable price. It has a durable 7 amp motor and cast metal gear case, with tool-free guard adjustment and spindle lock. The PORTER CABLE grinder is compact and lightweight, weighing just over 5 pounds, with a comfortable side handle and paddle switch. For basic cutting and grinding tasks, this model provides solid value and dependability.
FEATURED
SKIL 9295-01 6.0 Amp 4-1/2-Inch Angle Grinder

SKIL 9295-01 6.0 Amp 4-1/2-Inch Angle Grinder

  • If cost is a concern, the SKIL 9295-01 angle grinder is one of the most budget-friendly options. It provides 6 amps of power which is suitable for small cutting and grinding jobs. The SKIL grinder is very compact, lightweight and easy to handle. It includes a grinding wheel, cutting wheel, and spanner wrench. For occasional DIY use, the SKIL 9295-01 gets the job done at an affordable price

What to Look for in a 4 Inch Grinder

Power and Speed

For most DIY and professional tasks, you’ll want a grinder with at least 5 to 6 amps of power and a no-load speed of at least 10,000 RPM. The more power and higher RPM, the faster it will cut through tough materials like steel. However, higher power also means the tool will be heavier, generate more vibration, and less ergonomic to handle for long periods. You’ll need to find the right balance based on how often and intensely you plan to use the grinder.

Disk Size

A 4-inch grinder uses abrasive disks that are 4 inches in diameter, giving it the name. The most common disk types are cutting, grinding, and sanding disks in various grits. Make sure the grinder you choose can accommodate a range of disks for different applications. Some models even allow you to use wire wheels, flap disks and other attachments for maximum versatility.

Safety Features

Since angle grinders spin at high speeds and can throw off debris, it’s important to consider safety features like:

  • A paddle switch or slide switch that is easy to activate in an emergency
  • A spindle lock for quick disk changes
  • A guard to protect you from flying sparks and bits
  • Anti-vibration technology to reduce fatigue
  • A sturdy grip and ergonomic handle for control
  • Thermal overload protection to prevent overheating

With the right mix of power, performance, and safety features, a 4-inch angle grinder can tackle a wide range of jobs. Compare the specs and prices of different models to find an option in your budget that will suit your needs. Your workshop will be glad you did!

Most Important 4 Inch Grinder Features

Most Important 4 Inch Grinder Features
FeatureDescriptionWhy it Matters
Power SourceCorded (AC) or Cordless (battery-powered)Corded offers consistent power but limits mobility. Cordless provides greater freedom of movement.
Motor PowerMeasured in amps (for corded) or voltage (for cordless)Higher amps/voltage generally means more powerful cutting and grinding.
Speed (RPM)Revolutions per minute, no-load speedAffects efficiency, with higher RPMs ideal for faster cuts and material removal.
Switch TypePaddle switch or slide switchPaddle switches provide greater control and often include safety features. Slide switches can be easier for prolonged use.
Safety FeaturesSpindle lock, restart protection, burst-resistant guardsSpindle lock for easy wheel changes, protective features prevent injuries.
Comfort & ErgonomicsHandle positions (2 vs. 3 position), vibration control, grip sizeInfluences fatigue during extended use and ability to control the tool.
DurabilityConstruction materials, dust protection, brand reputationImpacts tool lifespan, especially in harsh work environments.
Additional ConsiderationsWeight, price, specific use cases (cutting vs. grinding)These factors influence overall suitability for your needs and budget.

Power and Speed

For most cutting and grinding tasks, you’ll want a powerful motor, typically 5 to 7 amps for a 4-inch grinder. Higher amperage means more power and higher no-load speed, which is the maximum RPM when the disk is spinning freely. Look for a grinder with at least 6,000 to 10,000 RPM for the best performance. Higher RPMs allow for faster material removal, while lower speeds give you more control. The ideal grinder will have variable speed control so you can adjust it for different tasks.

Disk Capacity

The most common disks for 4-inch grinders are cutting disks, grinding disks, flap disks, and wire wheels. Make sure the grinder you choose can accommodate the types of disks you want to use. Most 4-inch grinders hold cutting disks up to 1/4 inch thick and grinding disks up to 1/2 inch thick. Some models may be able to handle thicker disks, which provide more aggressive cutting and grinding action.

Safety Features

Using an angle grinder can be dangerous if the proper safety precautions aren’t taken. Look for a grinder with features like a paddle switch for easy on/off, a spindle lock to prevent the disk from spinning when changing disks, and an overload protection device.

A grinder guard should cover at least half the disk to protect you from flying sparks and debris. It’s also a good idea to wear safety glasses, work gloves, and protective clothing anytime you operate an angle grinder.

Ergonomics

Holding and controlling a heavy power tool for extended periods can be tiring. Look for an angle grinder with an ergonomic, rubberized grip for comfort. A side handle also provides an extra contact point for more stability and control. Some grinders have vibration-reducing technologies to minimize fatigue. An angle grinder should feel balanced and natural in your hands.

Cord Length

For most workshop tasks, a 6 to 8 foot power cord will give you enough mobility. Longer cords, up to 12 feet, are good for outdoor jobs or where electrical outlets are scarce. Consider a cord with a ground fault circuit interrupter (GFCI) for safety, especially in damp areas.

4 Inch Grinder Uses and Applications

4 Inch Grinder Uses and Applications

A 4 inch angle grinder is one of the most versatile power tools you can have in your workshop or garage. Its compact size but powerful motor allows it to tackle a variety of jobs.

TaskDescriptionTips
CuttingSlicing through metal (pipes, rebar, sheet metal), tile, stone, and concrete* Use correct disc type for the material (e.g., metal cut-off disc, masonry disc)*
* Secure workpiece with clamps*
GrindingRemoving rust, paint, welds, smoothing rough surfaces, and sharpening tools* Wear safety glasses and gloves* * Angle grinder at 5-10 degree angle to the work surface*
PolishingWith polishing attachments, create a smooth, shiny finish on various materials* Use lower speeds for polishing* * Consider variable speed grinder for more control*
SharpeningBlades on lawnmowers, axes, shovels, and similar cutting tools* Secure blade before sharpening* * Maintain correct bevel angle for the blade type*
Preparing SurfacesRemoving mortar between bricks, smoothing concrete, preparing surfaces for other work* Use eye and ear protection*
* Employ dust control measures*

Cutting and Grinding

The main uses of an angle grinder are cutting and grinding. You can use the grinder to cut tile, stone, concrete, and metal. Attach a abrasive cutting disk to slice through these hard materials. Grinding disks, also known as flap disks, attach to the grinder to grind and shape the edges of materials.

Sanding and Polishing

With the proper attachments, an angle grinder becomes a useful sander and polisher. Attach sanding disks to sand wood and metal surfaces. For polishing, use a buffing pad and polishing compound to buff stainless steel, aluminum and other metals to a mirror shine. These attachments turn the angle grinder into a versatile tool for surface finishing.

Detailing

For detail work, a 4 inch grinder shines. Its compact size allows you to grind in tight corners and spaces. Use the grinder to weld grind welds, remove excess weld material and create beveled edges. Wire wheels and wire brushes attach to the grinder to remove rust, paint and debris from surfaces. These attachments, along with the small grinding disks and sanding pads, make the 4 inch grinder ideal for detail and finish work.

With a good 4 inch angle grinder and a variety of disks and attachments, you’ll find many uses for this compact but powerful tool in your shop or garage. Its versatility and relatively low cost make it one of the most useful power tools you can own. Keep a 4 inch angle grinder on hand, and you’ll wonder how you ever lived without it.

4 Inch Grinder Buying Guide and FAQs

Power

For most DIY tasks, look for an angle grinder with a motor that’s at least 5 to 6 amps. More powerful models, 8 to 10 amps or higher, are good for heavy-duty jobs like cutting steel or concrete. Higher amperage means more torque, so the grinder can spin larger accessories like thick cutting disks.

Disk Size

As the name suggests, 4-inch angle grinders use 4-inch diameter cutting and grinding disks. These smaller disks allow for good control and maneuverability. Larger disks, like 7 or 9 inches, require more powerful motors but can complete jobs faster. For most casual uses, a 4-inch grinder will work great.

Safety Features

Look for a grinder with additional safety features like:

  • A paddle switch or trigger switch that’s easy to turn on and off.
  • A guard that protects you from flying sparks and debris.
  • A spindle lock button to make it easy to change disks.
  • Anti-vibration technology so your hands don’t go numb!
  • Burst-resistant disks that reduce the risk of the disk shattering while in use.

Cord vs. Cordless

Cordless angle grinders are convenient but are typically less powerful and runtime is limited by the battery life. Corded grinders provide constant power as long as they’re plugged in. For most DIYers, a corded grinder will work great and is more budget-friendly. Pick a cordless grinder if portability is a top priority.

Brand

Stick with a reputable power tool brand like DeWalt, Makita, Bosch or Porter Cable. Lesser-known brands may be cheaper but typically won’t last as long and may lack safety features and power. Buy from a trusted retailer like Home Depot or Lowe’s to ensure you’re getting an authentic, high-quality product with a warranty.

Cost

You can find a solid 4-inch angle grinder for between $50 to $150. More powerful models with extra features like cordless functionality or higher amperage can cost $200 or more. For occasional use, an affordable corded grinder around $60 to $100 is a great place to start.

Conclusion

So there you have it! The Makita 4-1/2 inch grinder clearly stands out as the top choice if you want serious power and durability. But the DeWalt 4-1/2 incher gives it a run for the money and costs less. For most folks, the Milwaukee 4-1/2 inch model hits the sweet spot between power and price. It’ll handle most home DIY and repair jobs with ease.

If budget is tight, the Ryobi 4 inch grinder can’t be beat. Just don’t expect it to stand up to heavy daily use. Whichever 4 inch angle grinder you decide on, follow the safety tips to avoid accidents. Wear eye and ear protection, avoid loose clothing, and watch your fingers. Happy grinding!

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