Professional Tool Reviews for Pros


Flex 24V Cordless Rear-Handle Circular Saw Review

Flex 24V Cordless Rear-Handle Circular Saw Review
PTR Review
  • Overall Rating 9.7

After testing the Flex 24V cordless rear-handle circular saw head-to-head against the best competition, there's no question in our minds that it's the top-performance saw in its class. Add in a solid design with thoughtful features, and overall, there's no better cordless rear-handle saw in our opinion.

Overall Score 9.7 (out of 10)

Flex 24V Cordless Rear-Handle Circular Saw Sets New Power Benchmark

If you’ve seen the Flex Faceoff Round 2 video, you already know the Flex 24V cordless rear-handle circular saw means business. But is it really as good as they made it out to be? We ran it through our series of tests to find out!


Pros

  • Fast cutting speeds
  • Strong in tough cuts
  • Magnesium shoe and guard construction
  • Pivoting dust port
  • Stock blade performs well
  • Better LED light coverage than most

Cons

  • No significant drawbacks

Flex 24V Cordless Rear-Handle Circular Saw Performance

Flex uses a sensor-free brushless motor to drive the saw and they pair it with Stacked Lithium batteries to get up to 2500 watts of power. Think about that for just a second—a 15-amp saw running at 120 volts can only produce 1800 watts. Flex is getting nearly 40% more watts!

Part of the power turns into speed—6200 RPM worth. When you look at the competition, Makita’s XSR01 tops out at 5100 RPM, while DeWalt’s DCS577 and Milwaukee’s 2830 are closer at 5800 RPM. If Flex has enough torque to keep those RPMs up, it should cut faster considering that means an extra 160 teeth slice through every second compared to DeWalt and Milwaukee.

In our testing, Flex was noticeably faster, including in tougher cuts with stacked OSB. Head-to-head against Milwaukee, we were able to push Flex noticeably harder before it stalled. It’s hard to imagine many scenarios where you would want to cut faster than this saw allows you to.

Flex 24V Cordless Rear-Handle Circular Saw Review

That’s great, but what about the saw’s other cutting characteristics?

Tracking is excellent and the high blade speed helps keep the saw moving forward as you make micro-adjustments to stay on your line.

Flex 24V Cordless Rear-Handle Circular Saw Review

The guard action is excellent, smoothly lifting out of the way on the vast majority of your cuts. It’s possible it needs a little help if you’re making shave cuts or getting started on a thin compound cut, but that’s such a small percentage of the time, we’re not bothered by it at all.

Flex 24V Cordless Rear-Handle Circular Saw Design Notes

Weight

Flex 24V Cordless Rear-Handle Circular Saw Review

Flex uses magnesium for the footplate and guards, helping to keep the overall weight down without sacrificing strength. Without a battery, the saw is a very reasonable 10.1 pounds. Adding the 10.0Ah Stacked Lithium battery for the best performance, it’s 13.6 pounds.

While that might sound heavy for a circular saw, it’s right in line with Milwaukee and DeWalt.

Height and Bevel Adjustments

The height and bevel adjustments are almost typical. They use a lever-action clamp lock and there’s nothing fancy about the height adjustment. It is worth mentioning that it offers a 2 5/8-inch cutting capacity at 90° though.

The bevel adjustment is similarly normal, save for how you engage the positive stops. To adjust for 22.5°, 45°, or 56°, you push in the stop and turn it to the angle you need, allowing it to slip into the correct detent. Thanks to metal construction, it doesn’t feel chincy or weak.

Dust Port

Dust Port

Flex uses a dust port that directs ships away opposite the blade. A lot in it prevents you from blowing debris back at the motor housing and forcing them either forward or down. When you’re not using a vacuum, we suggest pointing the dust port down.


LED Light

LED lights are typically a ho-hum feature these days. However, Flex uses a broader light that does a better job of lighting up your sightlines from both sides of the blade.

Additional Highlights

  • Ergonomic, contoured main handle
  • Window to view battery indicator
  • Single finger trigger
  • Rafter hook
  • Onboard blade wrench storage
  • Flat motor housing makes a more stable platform for blade changes

Flex 24V Cordless Rear-Handle Circular Saw Price

Expect the bare tool to retail for $249 and the kit with a 10.0Ah Stacked Lithium battery and charger to run $399.

Flex backs this saw with a 5-year warranty. However, if you register by December 31, 2022, Flex will upgrade you to the Flex Founders lifetime warranty.

The Bottom Line

After testing the Flex 24V cordless rear-handle circular saw head-to-head against the best competition, there’s no question in our minds that it’s the top-performance saw in its class. Add in a solid design with thoughtful features, and overall, there’s no better cordless rear-handle saw in our opinion.

Specifications

  • Model: Flex FX2141R
  • Power Source: Flex 24V battery
  • Blade Diameter: 7 1/4 in.
  • No-Load Speed: 6200 RPM
  • Cut Capacity: 2 5/8 in. at 90°
  • Bevel: 0 – 56°
  • Weight: 10.1 lbs bare, 13.6 lbs with battery

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OldDominionDIYer

As a 24V “max” battery system is it really in the same class as the Milwaukee and Dewalt’s? I own some Flex cordless 24V tools and love them and I’m considering my first rear handled saw. While I’m deeply invested in Milwaukee I certainly could get the bare tool and roll with the 3 Flex batteries I already have so it’s making for a tough decision! Thanks for the review!

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