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M18 · Brushless

M18 FCS66GR3 Circular saw No product photo yet

Circular Saws · Milwaukee M18

Milwaukee M18 FCS66GR3 Brushless 190mm Circular Saw (Body Only)

3.9kg bare18V3 years (with registration)

18V M18 FUEL brushless 190mm circular saw. 68mm cut depth at 90°, 53mm at 45°, the deepest cut of the M18 saws. 0–50° bevel. Runs native on Milwaukee FS-pattern rail (Festool and Makita rails also fit). DEK26 dust adaptor, LED, rip fence. Body only.

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190mm

Blade

68mm

Cut depth (90°)

6,000rpm

Max speed

3.9kg

Weight (bare)

Where it sits among 190mm circular saws

Scaled against the 29 circular saws with a 190mm blade we list, so other sizes aren't in the mix. Not a score: bigger isn't always better for your job.

Cut depth at 90°68mm

61mm lowestDeWalt DCS579highest 70mmBosch GKS 18V-68 C

Cut depth at 45°53mm

43mm lowestMakita DHS783highest 53mmThis one

Max bevel angle50°

45° lowestEinhell TC-CS 1410highest 57°DeWalt DCS573

Weight (bare)3.9kg

2.92kg lightestEinhell TP-CS 18/190 Li BLheaviest 5kgDeWalt DCS577

Compare it with: + Bosch GKS 18V-70 L + DeWalt DCS573 + Einhell TP-CS 18/190 Li BL + Makita HS7100

Full specs

From Milwaukee's own documentation. Checked 21/06/2026. Report a spec error ›

Cutting

Saw typeWood

Blade diameter190 mm

Blade bore30 mm

Max depth (90°)68 mm

Max depth (45°)53 mm

Bevel range0–50°

Blade included✓ Yes

Rip fence included✓ Yes

Kickback technologyNo

Power & Motor

Voltage18V

MotorBrushless

No-load speed6,000 rpm

Dust & Rail

Dust port sizeDEK26 adaptor (supplied)

Extractor hose✓ Fits Milwaukee extractor hoses with the supplied DEK26 adaptor (4 extractors listed)

Compatible railsMilwaukee rail 48-08-0571 (1.4m) / 48-08-0572 (2.7m), native (Milwaukee rail is FS-pattern: Festool and Makita rails fit too)

Extractor auto-startNo

Physical & Build

Weight (bare)3.9 kg

Weight (with battery)4.6 kg

LED work light✓ Yes

Noise level100.7 dB(A) LpA / 108.7 dB(A) LwA

Vibration1.5 m/s²

The verdictOur take

Milwaukee's current 190mm flagship, replacing both the FCS66 and the rail-compatible FCSG66. FORGE is the headline: it holds 6000rpm under load, which on spec makes it one of the fastest-cutting cordless saws in the class, and it takes Milwaukee's FS-pattern 1.4m guide rail for sheet work (Festool and Makita rails fit too), giving 64mm on the rail and a full 68mm off it. Two honest trade-offs show in the numbers: it is loud at 100.7 dB(A), noticeably above the older FUEL saws, and with a 12Ah FORGE pack fitted it is heavy at the top of its range. Vibration, though, is low at 1.49 m/s². One for an M18 user who wants mains-saw cut speed and rail accuracy in a single tool.

Powered by Milwaukee M18 · 11

All 11 batteries that fit this tool, smallest first. Kits and chargers ›

M18B2 2.0Ah · 36Wh 0.4kg 4.3kg from £56.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18HB3 3.0Ah · 54Wh 0.7kg 4.6kg from £64.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18B4 4.0Ah · 72Wh 0.7kg 4.6kg from £57.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18B5 5.0Ah · 90Wh 0.7kg 4.6kg from £59.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18B5-CR 5.0Ah · 90Wh 0.7kg 4.6kg from £87.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18HB5 5.0Ah 0.79kg 4.69kg No retailer price yet About this battery ›

M18HB5-CR 5.0Ah 0.79kg 4.69kg No retailer price yet About this battery ›

M18HB5.5 5.5Ah · 99Wh 1.1kg 5.0kg from £99.95at Tooled Up + £6.95 delivery View at Tooled Up ›

Tool weight worked out by adding each pack's weight to the bare tool, using the makers' figures. The maker's own with-battery figure can differ slightly. We may earn a commission on retailer links.