Dewalt DCG412B 20V MAX Cordless Lithium-Ion 4-1/2 in. Cut Off Tool (Tool Only)

Dewalt Model: dewndcg412b
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CA Residents
Prop 65 Warning
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WARNING: This product can expose you to Lead, which is known to the State of California to cause Cancer and Birth Defect/Reproductive Harm. For more information go to
Dewalt DCG412B 20V MAX Cordless Lithium-Ion 4-1/2 in. Cut Off Tool (Tool Only) Dewalt Model: dewndcg412b
price for vip customer


Product Features & specs :

Dewalt tools are Guaranteed Tough

Dewalt Guaranteed Tough

Dewalt designs and optimizes professional workhorse solutions – tools, accessories and service – to ensure confidence for the toughest jobsite conditions

Take charge and use your 20V Max Lithium Ion battery on multiple tools

Take Charge

Use your 20V MAX Lithium Ion Battery across multiple tools

Flexible 20V MAX battery options ranging from lightweight to long runtime

Choose your Battery

Choose any 20V MAX Battery regardless of amp hour to run your tools

200 plus products and growing in the 20V MAX family of tools

200+ Products

Our largest cordless platform continues to expand making 20V MAX a system you can build on

Compatible with a Wide Range of 20V MAX Batteries to fit your needs

Dewalt DCB203 battery for lightweight usage

More Compact 2 Ah

Dewalt DCB230 battery

3 Ah

Dewalt DCB204 battery

4 Ah

Dewalt DCB205 battery

5 Ah

Dewalt DCB206 battery

6 Ah

Dewalt DCB612 battery with long run time

More Runtime 12 Ah

Dewalt DCG412B 20V MAX Cordless Lithium-Ion 4-1/2 in. Cut Off Tool (Tool Only)

The DCG412B 20V MAX Lithium Ion 4-1/2 in. / 5' in. Grinder increases productivity with features like Quick-Change wheel release, convenient trigger switch with lock-off button, and extended run-time battery.
  • 8,000 RPM motor provides high power for cutting and grinding applications
  • Tool-free guard allows for quick and easy guard adjustments/positioning
  • 2-position side handle offers greater control, comfort and versatility
  • Quick-Change Wheel Release allows for tool free wheel changes without the need for a wrench
  • 2-finger trigger switch with lock-off button for convenient activation and easier gripping
What’s Included:
  • 20V MAX Cordless Lithium-Ion 4-1/2 in. Cut Off Tool - DCG412B
  • 2-Position Handle
  • Type 27 Grinding Guard
  • Hex Wrench
  • 5 in. X 1/4 in. T27 Metal Grinding Wheel
Power Source
UL Safety
Wheel Diameter
4-1/2 in
No-Load Speed (RPM)
CSA Safety
Switch Settings
Wifi compatibility
Batteries Included
Battery Type
Case Included
Bluetooth Compatibility
Motor Type
Spindle Thread
5/8 in - 11 in
Variable Speed
Switch Type
Charger Included
ETL Safety
Battery System
16.75 in.
4.75 in.
7.31 in.
6 lbs.
Warranty Term
3 Year

Reviews :

4.6 / 5.0
57 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Would you recommend this product?
Yes (42)
No (1)
Easy To Use (43)
Powerful (35)
Ergonomic Design (23)
Value (5)
Loud (1)
Best Uses
Home Repair (6)
Small Projects (5)
Jobsite (4)
Frequent Use (3)
Rated 5 out of 5
Great value for the DIY-er
I bought this after finding the need to cut through some metal at the house. It worked for its intended purpose perfectly but i find myself reaching for it for more and more uses. It has come in handy multiple times and has way tons more uses than originally thought. I've ground concrete down with this, i've cut metal, i've sanded wood even. Super useful tool to have around the house!
This review was collected as part of a promotion
June 4, 2020
Originally posted at
Rated 5 out of 5
love this tool,very smooth running
other than going thru batteries quickly,smoothest,best balanced grinder i have,use it daily
April 25, 2020
Originally posted at
Rated 4 out of 5
handy on the farm
Bought this tool and use it in my mobile repair shop, I use exclusively cordless tools as i rarely have AC power. I use 4ah batteries and have had no issues.
December 31, 2019
Originally posted at
Rated 4 out of 5
Good for light work
Had this grinder for a while now. Have done both light and heavy grinding (not a lot of heavy grinding due to its efficiency) but a lot of light work. Smaller tasks that dragging a cord out wouldn’t be worth your time. Not the most efficient model due to it not being brushless but, it a base model. Also likes to get a little warm after a while. Overall I’m pretty satisfied for what I paid for it.
This review was collected as part of a promotion
November 6, 2019
Originally posted at
Rated 4 out of 5
Multiple uses!
I have had this grinder for a few months now. The blades are easy to switch out. The grinder itself is easy to use. You are able to move the guard plate To whatever position you need it for. I’ve used it to grind off nails, cut porcelain and ceramic tiles, even smooth out concrete surfaces. This grinder has multiple uses. Just be sure to get the proper blade for your project.
This review was collected as part of a promotion
November 6, 2019
Originally posted at
Rated 2 out of 5
Never lets me dowm
Have had this for a while now and its old reliable.
This review was collected as part of a promotion
November 6, 2019
Originally posted at
Rated 5 out of 5
Handy as a shirt Pocket!
I’ve had this grinder for a couple years and it is far and away the most versatile addition to my 20v Max collection. I use it often with a cut off wheel and it works fantastic! The battery life will surprise you and it has more power than a typical corded grinder.
This review was collected as part of a promotion
November 5, 2019
Originally posted at
Rated 5 out of 5
Very good tool
Excellent offering from Dewalt. Very easy use. Wish I had cut cors years ago.
September 28, 2019
Originally posted at
Rated 5 out of 5
LOCK feature
Recently just bought this grinder and I love it. I have the cord grinder but I have always wanted a cordless grinder for when I need it when there is no outlet near by or if I’m to lazy to plug in my other grinder. Very portable and easy to use. I love the locking feature makes it safe to change discs.
This review was collected as part of a promotion
June 26, 2019
Originally posted at
Rated 5 out of 5
Would you recommend this product?
Easy To Use
Ergonomic Design
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Small Projects
Home Repair
great Tool
This is 5th one of these I have purchased; all from Tyler tool. They work great, so this is the reason I have a different one for different tools: Grinder, big and small wizzer wheels, stainless wire wheels both cup and flat wheel.
April 24, 2019
1 year ago
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Q & A :

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Browse 5 questions Browse 5 questions and 12 answers
The instructions (and this web site) state that the tool comes with a Type 1 cutting guard. But my cutting guard is open faced, not two sided, which I understand to be the Type 27 cutting guard. I also noticed that reviews from another web site state that they received this tool with a Type 27 guard. Which guard did yours come with?
Jim Mancave on Feb 27, 2016
BEST ANSWER: Not the one in the CPO picture, the more one sided open style, and I did buy 2 at 2 different times.
Sent from my iPad
Is this compatible with the xr 20v battery.
mickey on Apr 16, 2016
BEST ANSWER: Yes, XR and MAX batteries are compatible.
Thank you,
Mark Kamprud
Director of Operations
Vertex Group LLC
Can I use this to wheel out boats with a 7 inch buffing wheels the riyobe shuts off
f on Feb 15, 2016
BEST ANSWER: No, I would not recommend that unit to buff a boat. The Dewalt DWP849x would be a much better option for what you are trying to accomplish.
Is this unit compatible with BOTH 5/8" and 7/8" arbor wheels? It is supplied with a 7/8" arbor metal cutting wheel.
Captain Builder on Sep 24, 2013
BEST ANSWER: Yes, it is compatible with the 5/8" arbor wheels.
wil accept a 5 inch blade?
firhooks unlimited, inc on Dec 14, 2014
BEST ANSWER: That unit will not accept a 5 inch blade.


Most DEWALT® Tools purchased on or after January 1, 2004 come with a warranty package that includes:

Three-Year Limited Warranty. DEWALT will repair, without charge, any defects due to faulty materials or workmanship for three years from the date of purchase. This warranty does not cover part failure due to normal wear or tool abuse. For further detail of warranty coverage and warranty repair information, visit or call 1-800-4-DEWALT (1-800-433-9258). This warranty does not apply to accessories or damage caused where repairs have been made or attempted by others. This warranty gives you specific legal rights and you may have other rights which vary in certain states or provinces.

One-Year Free Service Contract. DEWALT will maintain the tool and replace worn parts caused by normal use, for free, any time during the first year after purchase.

90-Day Money Back Guarantee. If you are not completely satisfied with the performance of your DEWALT Power Tool, Laser, or Nailer for any reason, you can return it within 90 days from the date of purchase with a receipt for a full refund - no questions asked.