Milwaukee 2684 vs DeWalt DCM848: Two Cordless Polishers That Are Nearly Identical

Introduction

Milwaukee’s 2684 dual action random orbital polisher has drawn plenty of questions about how it stacks up against the DeWalt DCM848. The short answer: these two machines are remarkably close. Nearly identical specs, very similar power delivery, and only small differences in grip, noise, and vibration separate them. Here is how they compare and which one makes sense depending on your situation.

Same Specs on Paper

Both polishers use a 5-inch backing plate with a 15 mm throw, and both rely on two-finger variable speed triggers. Each runs on a battery twisted onto the end of the body, which keeps the overall footprint compact for a cordless design.

They are also almost the same length and height, with the Milwaukee built just slightly slimmer. If you lined them up on a bench without labels, you would struggle to tell much apart at a glance.

Speed Range and Adjustment

Both machines use an almost identical knob to set maximum RPM. The DeWalt’s range runs from 2,000 up to 5,500, though there is little noticeable increase between 5,000 and 5,500. The Milwaukee covers 2,650 to 5,100. In practice, both ranges cover the same working territory for polishing.

Power, Noise, and Trigger Feel

When it comes down to it, both share very similar power, and while using them you likely would not feel a difference between the two. The variable speed triggers on both are easy to use and behave much the same way.

The one audible difference is tone: the DeWalt runs a little louder, with a more pronounced motor sound, even if the actual decibel difference may be small. Perceived noise is where the Milwaukee feels slightly more refined.

Ergonomics and Handling

The biggest practical difference is up front. The Milwaukee has a smaller front grip nub that is easier to hang onto; you can get two fingers around it, place your whole hand, and grip from different angles. It is not designed for downward pressure, just for holding the machine steady. The DeWalt’s front grip is larger, which makes two-finger use slightly more awkward, but it still sits comfortably in the palm if you use it that way.

DeWalt also offers a side handle, though most users probably will not use it. Because both machines are long and the batteries stick out at the rear, both can contact body panels in tight or curved areas of a vehicle. Neither is immune to that.

Vibration and Refinement

There is a touch more vibration felt in the DeWalt than the Milwaukee, though not enough that you would notice a difference over a full day of use. It is worth noting the DeWalt unit in this comparison was purchased in 2019 while the Milwaukee was brand new, so unit age could play a role.

Overall, the Milwaukee feels slightly more refined, closer to the feel of a corded polisher, while the DeWalt is just a touch less refined with slightly more vibration.

Batteries and Runtime

Both work well on battery power. The DeWalt runs nicely on a 5 Ah battery, which keeps things a bit slimmer. The Milwaukee ships with a 6 Ah battery, and it would likely run fine on a 5 Ah too, since the extra capacity is not needed to power either machine. The 6 Ah pack simply lasts a very long time.

Which One Should You Buy

If you are choosing on availability and price right now, the Milwaukee is currently less expensive at $299 versus the DeWalt’s $329, and it is also easier to find in stock. But if you are already invested in the DeWalt battery line, do not hesitate: the DCM848 is every bit as good a polisher, with very little real difference between the two.

It is rare to see two tools this close, separated only by slight grip differences and a small perceived vibration difference. You cannot go wrong with either. Both are great tools worth picking up if you are in the market.

Conclusion

The Milwaukee 2684 and DeWalt DCM848 are about as close to identical as two polishers get: same 5-inch plate, same 15 mm throw, similar power, and comparable ergonomics. Choose the Milwaukee for its lower current price and easier availability, or the DeWalt if you want to stay in its battery platform. Either way, both rock.