Dewalt DCG412B 20V MAX Lithium Ion 4-1/2″ Grinder Review

Grinding is sometimes enjoyable or stressful. How stressful or enjoyable grinding depends on several factors such as the type of grinder used. If you visit a hardware today, you will find several types of grinders, and be confused on which one to buy.


I know some customers may go for the cheapest grinders thinking that will serve them to the standards they expect.

Some customers will buy the most expensive hoping that those are of the highest quality and will serve them best. Believe me; customers have cried foul of their money by using such judgments.

Before you buy a grinder, you should seek one who has used several types of grinders and can tell you the most optimum which will deliver the customers' expectations.

From research and using different types of grinders I have come to find that Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2" grinder is the best type to buy. The reason is that it is very versatile, easy to use, powerful and of high quality.





Heat Resistance

Charging Time


Battery Life




  • High power
  • Allows for tool free wheel changes without the need for a wrench
  • Guards can be easily adjusted
  • Comfortable
  • Versatile


  • Drains batteries faster

Key Features


7,000 RPM Motor

There are some significant factors that need to consider when a customer wants to buy a grinder. One of the fundamental considerations is power. The grinder should have the power to grind different surfaces easily and faster.

The 7,000 RPM motor of the Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2" grinder provides high power for cutting and grinding applications, thus making grinding enjoyable and comfortable. The power provided can be used for cutting and grinding applications.


Quick-Change Wheel Release

For those who have visited workshops where grinding is being done, probably you have seen how the guys struggle to change a worn out tool. For sure, it is a waste of time and energy. You may have seen how they have first to clamp the grinder tightly then use a wrench to replace the tool.

The Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2" grinder does not use that old technology. The grinder has a Quick-Change Wheel Release for tool-free wheel changes without the need for a wrench.


2-Finger Trigger Switch with Lock-Off Button

The current grinders you can access when you visit your nearest hardware shop have problems faced when handling them. The problem is that current grinders are quite difficult to activate and at the same time operate.

Most of the current grinders can be easily operated accidentally since they do not have a lock- off button.

Now the Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2" grinder has solved that by having a lock off button thereby reducing chances of accidents. The 2-finger trigger switch with lock-off button also makes it easier for gripping.


2-Position Side Handle

When I said this is the best grinder, some may not have believed me, even when I bought it I did not know much about it. I tell you that the grinder makes your grinding and cutting operations more comfortable

Trust me, you will love your machine work even more. Apart from comfort, the 2-position side handle that the Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2" grinder has offers greater control and versatility.


Tool-free Guard

Another fundamental property or feature a customer should check in a grinder before buying one is the flexibility. Since you know that a grinder can be used for cutting and grinding applications, then it should be adjusted during any of the two applications.

Also, the tool should be used by different persons with different physical appearance; some may be tall or short. All these should be incorporated in the design of a grinder, and that is the flexibility.

The Tool free guard of Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2" grinder allows for quick, easy guard adjustments/positioning, therefore very much flexible.

Frequently Asked Questions

Is the speed of the grinder variable?

A: The speed varies from 0 to full speed in less than one second at the start, from where the speed is constant

Is the grinder heavy as some I have used before?

A: No, the grinder is light and only weighs 2.3 k.

Can I use the grinder to grind off and smooth quick set after home tile removal job?

A: Yes it can be used by use of a concrete grinding wheel and a concrete cut-off wheel.

Final Verdict

When you think of grinding or cutting and visits a hardware store, Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2" grinder is the one to buy. The grinder is the one to buy and trust with your cutting and grinding job.

Further by buying the Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2" grinder your grinder operations will be comfortable and enjoyable.​ The grinder provides high power, allows for tool free wheel changes without the need for a wrench, highly versatile and of high quality.

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Trevor Barton

Trevor Barton is the Editor of In personal life he is a father of two cute kids and loving husband of a beautiful wife. He love foods and nothing is more important than reading book in his spare time.

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