Milwaukee M18 6-1/2 in. Circular Saw Review: Fast, Light, and Job-Site Ready

Introduction

Milwaukee has a new 6-1/2 in. M18 circular saw on the market, built around a brushless motor with a 6,000 RPM no-load speed. Milwaukee claims it is 20% more powerful and 40% faster than the competition, and after putting it through a stack of cuts, the speed claim is easy to believe. This is a compact, lightweight framing saw with a left-side blade, and it makes a strong case for replacing a larger 7-1/4 in. saw for most everyday work.

Cutting Performance and Battery Choice

The first real test was cutting through two stacked pieces of 1/2 in. OSB, starting with the 5 Ah battery and then comparing against the 8 Ah pack. The difference is significant. The 5 Ah battery handles normal cuts just fine, but on more complex or deeper cuts you can feel it slow down. Step up to the 8 Ah and the saw simply blasts through the wood, holding torque at speed.

Milwaukee says the saw runs with any M18 battery, and the practical takeaway is that the 8 Ah and Forge batteries deliver the strongest performance. Above the 8 Ah, the gains are harder to feel. In crosscuts through a 2x6, the saw was so quick that pushing it faster produced tear-out, which says more about the pace than the saw itself. On a steady, easy cut, the RPMs barely dip at 6,000.

One noticeable trait is how much sawdust this thing throws. Our unit did not include the dust port accessory, but these saws ship with a universal dust port that can be connected to a vacuum. Given the volume of dust being ejected, it should work very well for keeping the work area clear, which is a genuine benefit for woodworking use.

Bevels, Depth of Cut, and Sight Lines

The saw bevels to 50°, with positive detents at 45° and 22.5°. Max depth of cut is 2-1/4 in. at 90° and 1-9/16 in. at 45°. In bevel cuts through two stacked pieces of OSB, roughly equivalent to three sheets, it performed without complaint.

The LED light at the front comes on with the trigger and shuts off after about 20 seconds, keeping sight lines clearly visible. For right-handed users, the left-side blade placement is exactly where you want it: you can see exactly what the blade is doing through the cut. A dust blower up front keeps the cut line clear and works well.

Build Quality and Everyday Handling

The base plate is metal and feels solid, moving only slightly but staying easy to handle. The blade wrench lives in the handle, tucked in tight with rubber to keep it from falling out, and it goes in easier than it comes out, though it is always easy to get to when needed. There is a rafter hook and a belt hook, an ambidextrous safety, and an arbor lock.

The shoe drops down with detents at each marked position, and there are screw holes to attach a fence on either side. Even with an 8 Ah battery attached, the saw stays balanced and comfortable, and it feels small and light enough that leaving the 7-1/4 in. behind is a realistic proposition. Out of the box, the shoe sits flush and the blade is set at a true 90°, which speaks to the quality and accuracy Milwaukee puts into the tool.

Things to Consider Before Buying

The 5 Ah battery works for normal cuts, but if you regularly do deeper or more demanding cuts, plan on an 8 Ah or larger pack for the full experience. At maximum feed speed you can induce tear-out, so most users will cut a little slower, which is how it should be used on the job site anyway. If you routinely cut stacked LVL or other large stock, a 7-1/4 in. saw still has a place.

Buying Advice

This is a fast, smooth, lightweight framing saw with the torque to back up its 6,000 RPM rating, and it is well suited to framing and most major job-site chores. The vacuum-compatible dust port is a big plus for anyone doing finish or woodworking work. If you pick up this saw, budget for the larger battery pack that matches how you cut.

Conclusion

The Milwaukee M18 6-1/2 in. circular saw delivers on the speed and power claims in practice, keeps excellent balance with even a big battery, and offers thoughtful details like the left-side blade, bevel detents, and dust port support. For most framing and everyday cutting, it is an easy saw to love and a strong candidate to become your daily driver.