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DEWALT DCG412B 20V MAX* Lithium Ion 4-1/2” Grinder vs Milwaukee Electric - M18TRADE BRUSHLESS 4-1/2 / 5

Updated July 2026 — DEWALT DCG412B 20V MAX* Lithium Ion 4-1/2” Grinder wins on runtime, Milwaukee Electric - M18TRADE BRUSHLESS 4-1/2 / 5 wins on price and safety.

The Milwaukee Electric M18TRADE offers higher RPM and a lower price, making it a better choice for speed and value. However, the DEWALT DCG412B provides extended runtime and a stronger market presence.

Why DEWALT DCG412B 20V MAX* Lithium Ion 4-1/2” Grinder is better

Price

DEWALT is more expensive.

Sales Rank

DEWALT has a better sales rank.

Runtime

DEWALT emphasizes extended runtime.

Why Milwaukee Electric - M18TRADE BRUSHLESS 4-1/2 / 5 is better

Speed

Milwaukee has a higher RPM.

Design

Milwaukee features a paddle switch.

Price

Milwaukee is cheaper.

Overall score

DEWALT DCG412B 20V MAX* Lithium Ion 4-1/2” Grinder
78
Milwaukee Electric - M18TRADE BRUSHLESS 4-1/2 / 5
85

Specifications

SpecDEWALT DCG412B 20V MAX* Lithium Ion 4-1/2” GrinderMilwaukee Electric - M18TRADE BRUSHLESS 4-1/2 / 5
RPM800011000
Guard AdjustmentTool-FreeTool-Free
Trigger Type2-FingerPaddle
Overload ProtectionNoYes
Bestseller Rank1019629839

Dimension comparison

DEWALT DCG412B 20V MAX* Lithium Ion 4-1/2” GrinderMilwaukee Electric - M18TRADE BRUSHLESS 4-1/2 / 5

Overview of the DEWALT DCG412B and Milwaukee Electric M18TRADE

The DEWALT DCG412B is priced at $127.99, while the Milwaukee Electric M18TRADE is more affordable at $110.00, making it about 17% cheaper. Both grinders are designed for cutting and grinding applications, but they bring different features to the table that may cater to distinct user preferences.

The DEWALT DCG412B features a robust 8,000 rpm motor and a Quick-Change Wheel Release for easy wheel changes without tools. In contrast, the Milwaukee Electric M18TRADE delivers a higher speed of 11,000 rpm and has a paddle switch design, appealing to users who prioritize speed and ease of use.

Power and Performance Comparison

When comparing the power and performance of the DEWALT DCG412B and Milwaukee Electric M18TRADE, the Milwaukee model stands out due to its higher RPM of 11,000. This increase in speed allows for quicker cutting and grinding tasks, making it a strong contender for heavy-duty applications.

While the DEWALT's 8,000 rpm motor is still powerful for most general applications, it may not match the efficiency of Milwaukee for tougher jobs. Thus, if your work requires maximum speed, the Milwaukee Electric M18TRADE might be the better option.

Design and Ergonomics

The DEWALT DCG412B incorporates design features such as a 2-finger trigger switch with a lock-off button, which enhances grip and control during use. Additionally, it offers a 2-position side handle for increased versatility and comfort.

On the other hand, the Milwaukee Electric M18TRADE utilizes a paddle switch design, which can be more intuitive for some users, especially in situations requiring quick activation. Both models emphasize user comfort, but the choice may come down to personal preference regarding the switch design.

Tool-Free Adjustments

Both grinders come equipped with tool-free guard adjustments, simplifying the process of changing the guard position. The DEWALT DCG412B's Quick-Change Wheel Release allows users to swap out wheels without needing additional tools, which is a significant time-saver.

The Milwaukee Electric M18TRADE also supports tool-free guard adjustments and adds the benefit of overload protection and an electronic clutch, which can provide better control during operation. This additional feature may offer a safety advantage during intense grinding sessions, making the Milwaukee model slightly more versatile in terms of safety features.

Sales Rank and Market Position

Sales rank can reflect a product's popularity and customer satisfaction. The DEWALT DCG412B holds a sales rank of 10,196, indicating that it is well-regarded among users. Conversely, the Milwaukee Electric M18TRADE has a higher sales rank of 29,839, suggesting it may not be as favored in the market.

This difference in sales rank may be influenced by brand loyalty or specific feature preferences among professional users, but the DEWALT's higher rank demonstrates a stronger market presence in this category.

Battery and Runtime Considerations

Both grinders are cordless, which is a significant advantage for users who need portability and flexibility. However, the DEWALT DCG412B emphasizes extended runtime, which can be crucial for professionals who require long periods of use without interruption.

While the Milwaukee Electric M18TRADE does not specify its runtime capabilities, its brushless technology often leads to better battery efficiency. Depending on your usage needs, the DEWALT may provide longer work sessions, while the Milwaukee could offer faster work completion times due to its higher RPM.

Price Comparison

The DEWALT DCG412B costs $127.99, while the Milwaukee Electric M18TRADE is priced at $110.00. This makes the Milwaukee model not only cheaper but also a more attractive option for budget-conscious consumers.

Over time, the price difference could influence purchasing decisions, especially for professionals or DIY enthusiasts looking to maximize their investment. The price point of the Milwaukee model may also appeal to those who prioritize value without compromising on essential features.

Which should you buy?

Deciding between the DEWALT DCG412B and the Milwaukee Electric M18TRADE ultimately depends on your specific needs. If you prioritize maximum speed and a lower price, the Milwaukee Electric M18TRADE is the better choice. However, if you value extended runtime and a more established market presence, the DEWALT DCG412B may be worth the additional investment. Both tools have their strengths, but the Milwaukee offers a more feature-rich experience at a lower cost.