• DeWalt DCG412 20v Grinder Unboxing & Demonstration | Unboxing 101
  • Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2 review
  • Dewalt DCG412 18V XR cordless grinder
  • DeWALT 20V MAX Grinder Unbox and Field Test – DCG412B
  • $116.64 + FREE Shipping Dewalt DCG412B Cut Off Tool 20V MAX* Lithium Ion 4-1/2"
  • Dewalt DCG412B 20V MAX* Lithium Ion 4-1/2
  • DEWALT 20V Max XR Cordless Brushless 4-1/2” Angle Grinder REVIEW! (DCG413B) #toolreviews #dewalt
  • DeWALT FlexVolt Angle Grinder (POWER!!)
  • Dewalt dcg412b grinder review
  • Video Review of DeWalt DCG412B 20V Max Angle Grinder
Amazon Price: $139.00 (as of December 14, 2018 3:14 pm – Details). Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on the Amazon site at the time of purchase will apply to the purchase of this product.

The DEWALT DCG412B 20V MAX Lithium Ion 4-1/2" Cut-Off Tool features a 7,000 RPM motor that provides high power for cutting and grinding applications. A Quick-Change wheel release allows for tool free wheel changes without the need for a wrench, and the tool free guard allows for quick, easy guard adjustments/positioning. It offers a 2-finger trigger switch with lock-off button for convenient activation and easier gripping, along with a 2-position side handle offers greater control, comfort & versatility. Common applications include: Cutting metal, threaded rod, rebar with Type 1 cut off wheels, Finishing metal with wire stringer bead wheels, sanding flap discs, and Grinding metal with 1/8 and 1/4 hubbed or depressed center wheels. Includes: DCG412 Cut-Off Tool, Spanner Wrench, Type 1 (Cutting) Guard, 2-Position Side Handle. This is a bare tool item (battery sold separately).

Technical Details

  • heavy-duty

Customer Reviews

Another fine Dewalt tool.. but confusing documentation

 on February 3, 2018
By Scott B
Another fine Dewalt tool. I have been very happy with all their 20V MAX line of tools since the batteries all seems to have charge level indicators and don’t self discharge like Ni-Cad batteries did.

Excellent little grinder

 on March 5, 2016
By Jim S.
Admittingly, I never owned a grinder before purchasing the DCG412. I had used a small air powered die grinder in the past, as well a larger disc sander. But I never really had a need for a grinder. That is, not until I got this one. As with most of the new Dewalt 20V Max tools I have purchased, I first set out to find out what accessories were available and then acquired them. I had to go through a learning curve to understand why I couldn’t use 5/8″ grinding wheels on a grinder with a 5/8″ shaft (7/8″ only), but once I figured that out, I was in acquisition mode. I have an assortment of metal & concrete cutting/grinding wheels, flap discs/wheels, carbide blades, and wire wheels. I found the enclosed top wheel cover and spare flanges/nuts at eReplacementParts. I even found a thin sided wrench on Amazon to tighten the inner nut on the fixed hub wheels. Unfortunately, the wrench wasn’t quite thin enough, so I used the DCG412 to take a 1/6″ off of each face. Now that’s ironic. Everything fits nicely in a 15″ Dewalt bag. No use having a powerful tool and then not having the proper $4.00 accessory when you really need it.


 on April 5, 2018
By Gravel Traveler
It completely killed a brand new, fully charged battery in about a minute and a half. Only 8,000 rpm compared to the standard 11,000 on the 110v models. It’s a great tool for light jobs like cutting screws or smaller things but cutting through 1/8″ steel or larger is too much for it. Also, it doesn’t have a threaded handle hole on top for tipping sideways. I sent it back.

Very surprised that I even needed this.

 on August 28, 2017
By The Cerney's
I have a nice plug in angle grinder, and my wife got this for me for my birthday. At first I was apathetic about it because of the tools I already have, but then the tractor I was using broke and I needed a grinder, but instead of having to drag it out with a neighbors tractor, I was able to grab this and the Oxy/acetylene and had it patched up in a couple hours. Honestly, had no idea I needed it until I did. I got rid of my corded one that weekend. This guy is really just as powerful, and with the fat 5ah battery, lasts a good while. Get it, you will ditch the cord too.

I like a lot of DeWalt cordless tools but this is …

 on March 20, 2018
By Justinstimpson
I like a lot of DeWalt cordless tools but this is not one of them. It just drains the battery way too fast. I wouldn’t recommend this grinder if you’re doing more than 5 to 10 minutes worth of grinding or any kind of heavy to medium grinding period.

… cordless grinder I have purchased and by far the best. This is the first 20v

 on July 15, 2016
By Skybluealien
This is the fourth DeWalt cordless grinder I have purchased and by far the best. This is the first 20v, the others were 18v post style batteries. While those were good, this is much better. Longer battery life, better balance and more power, able to do things that would bind up the older models.

Increadible little tool! This grinder comes in very handy …

 on November 21, 2016
By Robert Yama
Increadible little tool! This grinder comes in very handy on our jobsites. DEWALT definitely takes the cake for being the most durable. I construct steel buildings and have burnt through almost every other name brand cordless tools. DEWALT tools last almost twice as long as their competitors!

Bought This Item As A Bare Tool

 on January 30, 2015
By John
Since I bought this tool it has consistently been my “go to” tool for small cut-off and grinding applications. The 20V batteries last a long time and so far I have never run out of power before I finished up what I was doing. Typical use being about 45-60 minutes of on and off usage. I do not know how long the batteries would last with continuous usage. For me not having to deal with a cord while I was in the attic and away from a power source was really one of the greatest benefits. I wish they made this tool with a storage case so I could keep extra wheels, the charger and other accessories together.

20v is KING

 on July 22, 2017
By Mike
It has a ton of power just like a plug in version. I have only had it for a while but I have a feeling it’ll come in handy doing field work installations… Im happy I purchased it!

it last 15 mins or so on the 4 amp batteries and the 2 amp units are great for more comfort and light or intermittent use THE ..

 on March 12, 2015
By So Many Tools
Had a Bosch 18v one that we did not use much as it ate the batteries so fast and did not seem to have much ass
The owner of this website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon properties including, but not limited to, amazon.com, endless.com, myhabit.com, smallparts.com, or amazonwireless.com.