Metabo KS 66 FS: Rail compatible, but the dearest and the loudest

66 mm at 90°, 47 mm at 45°, guide rail compatibility and a case. But the KS 66 FS is the most expensive in the comparison and the loudest, at 109 dB(A), and its depth drops to 61 mm on a rail.

What its figures are worth

Cutting depth at 90° 30 %66 mm · 5/10
Price per mm of cut 25 %4.1 USD per mm · 4/10
Sound power LwA 20 %109 dB(A) · 4/10
Weight 15 %4.9 kg · 5.5/10
Cutting depth at 45° 10 %47 mm · 8/10

Every criterion in the scale could be calculated. Weighting: Cutting depth at 90° 30 %, Price per mm of cut 25 %, Sound power LwA 20 %, Weight 15 %, Cutting depth at 45° 10 %.

Choose it if

Regular use with a guide rail.
A saw kept in a case.

Skip it if

Noise: 109 dB(A), the highest in the panel.
Price per millimetre, the highest.
Depth on a rail: 61 mm.

Check the price on Amazon

Cutting a plank with the Metabo KS 66 FS.

Published specifications

Retrieved from metabo.com. Quoted from the page: « "Puissance absorbée nominale 1500 W / Puissance utile 840 W / Profondeur de coupe max. à 90° 66 mm / Profondeur de coupe max. à 45° 47 mm / Profondeur de coupe max. avec rail de guidage 61 mm / Ø de lame x alésage 190 x 30 mm / Plage d'inclinaison de/à 0 / + 47 ° / Vitesse de rotation à vide 5000 /min / Poids sans câble 4.9 kg / Sciage des panneaux de particules 3.4 m/s² / Incertitude de mesure K 1.5 m/s² / niveau sonore 101 dB(A) / Niveau de puissance acoustique (LwA) 109 dB(A) / Incertitude de mesure K 3 dB(A)" ; "directement utilisable sur des rails de guidage de Mafell, Bosch, Festool, Makita, HiKOKI, Hilti". »
Specification	Stated value
Cutting depth at 90°	66 mm
Cutting depth at 45°	47 mm
Blade diameter	190 mm
Input power	1,500 W
No-load speed	5,000 tr/min
Sound power LwA	109 dB(A)
Vibration	3.4 m/s²
Weight	4.9 kg (without cable)
Guide rail compatible	yes
Extraction port	yes

Before the first cut

Kickback is the main risk. It happens when the blade pinches in the kerf. Support the work on both sides so the kerf cannot close, keep the riving knife fitted, and never stand in line with the blade.
The lower guard must spring back on its own. Never wedge it open.
Unplug before changing the blade or adjusting the depth.
Hearing and eye protection. Every saw here that publishes its noise exceeds 95 dB(A) of sound power, and the kerf throws dust back at the user.
A mask for MDF and sheet material, whose fine dust irritates, and extraction connected where possible.

What the maker shows

Sheet cutting with the Metabo KS 66 FS in a workshop

Frequently asked questions

Where does this machine's score come from?

It is calculated, not awarded. Five measurable criteria are weighted, and each value is mapped onto a scale relative to the other machines in the comparison. For this machine, 100% of the scale could be applied: criteria the maker does not publish drop out rather than being replaced by an estimate.

What cutting depth do I need for framing?

A common rafter or joist is 63 mm thick: every saw in this comparison cuts it at 90° in one pass. For bevel cuts in 45 mm timber, check depth at 45°: it runs from 42 to 50 mm in this panel. For beams, you need a larger saw or two passes.

Do I need a guide rail?

For dead straight cuts in OSB or plywood sheets, a rail changes everything: the cut follows a straight edge rather than your hand. Several saws here accept one; each page says whether the maker states it.