Description

Key Features

Built for Tough Cuts

This cordless cut-off saw is made to cut reinforced concrete along with metal and masonry materials. The 3.4 inch cut depth gives you real capacity for jobsite demolition and utility work.

Lighter Than Gas

Milwaukee rates it up to 50% lighter than comparable gas demo saws. That means less fatigue when you’re carrying it, positioning it, or making repeated cuts through the day.

ONE-KEY Control

The Milwaukee M18 FUEL 9 in. Cut-Off Saw with ONE-KEY Kit adds tool tracking and management on top of cutting performance. That matters if this saw lives in a truck, trailer, or shared fleet.

Overview

The Milwaukee M18 FUEL 9 in. Cut-Off Saw with ONE-KEY Kit, Model 2786-22HD, is a battery-powered cut-off saw built for tradespeople who need serious cutting performance without dragging around a gas engine. This is a cordless cut-off saw designed for cutting reinforced concrete, metal, and masonry materials. If you want the reach and capacity of a 9 inch concrete saw but want faster startup, less maintenance, and indoor-friendly operation, this is the tool Milwaukee built for that job.

The big story here is capability. Milwaukee calls out the power to cut reinforced concrete, and the specs back up that this is more than a light-duty masonry saw. You get a 9 inch blade, a 3.4 inch cut depth, a 7/8 inch arbor, and a no-load speed of 6,600 RPM. In plain terms, that gives you the size and speed needed for common demolition, utility, and site-prep cuts in concrete, block, rebar-containing material, ductile pipe, cast iron, and other demanding jobsite materials.

Where this saw separates itself from gas units is day-to-day convenience. It runs on the Milwaukee M18 battery system, so there is no fuel mixing, no pull starts, no exhaust fumes, and no small-engine maintenance. Milwaukee also states it can be used indoors because it produces no fumes. For contractors working in basements, occupied buildings, mechanical rooms, or renovation spaces where gas equipment is a headache, that alone can be the deciding factor.

Milwaukee also pushed the jobsite details that matter when the saw is actually in use. The onboard water connection uses a quick-connect setup for concrete cutting, and the image data shows water feed to both sides of the blade for dust control during wet cutting. There is also a load or overload indicator light that coaches the user when pushing too hard, helping you stay in the tool’s efficient cutting range instead of bogging it down. That is the kind of feature that helps blade life and keeps cuts moving.

From a safety and control standpoint, this saw includes a fully adjustable guard and Milwaukee’s RAPIDSTOP blade brake. Milwaukee states the brake stops the blade in under 3 seconds after the trigger is released. On a tool in this class, that is not a throwaway feature. Faster blade stop means quicker repositioning between cuts and less waiting around with a spinning wheel after every pass. A spindle lock is also listed, and Milwaukee includes onboard storage for the wrench and hex key, so blade changes are easier to handle on site.

The kit configuration matters too. This is not just a bare tool. You get the saw, two M18 REDLITHIUM FORGE HD12.0 batteries, an M12/M18 Rapid Charger, one diamond blade, and one abrasive blade. That gives you a practical starting setup for both masonry and metal cutting instead of forcing you to build the kit piece by piece. If you are already on the M18 platform, the batteries also work across Milwaukee’s broader M18 system, which makes the investment easier to justify for crews standardizing on one cordless platform.

Physically, the saw measures 26.1 inches long, 7.6 inches wide, and 12.54 inches high, with a bare tool weight of 10.6 pounds. Milwaukee also claims it is up to 50% lighter than gas competitors, and one of the product images compares it at 11.9 pounds versus a leading gas competitor at 26.2 pounds. Whether you’re making repeated cuts off the ground or carrying the saw across a site, that reduced weight makes a real difference in fatigue and handling.

Who should buy it? This saw makes the most sense for concrete contractors, utility crews, general contractors, remodelers, masons, metal trades, and serious property maintenance teams that need a versatile cordless concrete saw and metal cutting saw in one platform. If you only make the occasional shallow cut in pavers, it is more tool than you need. If you need a pro-grade battery-powered cut-off saw that avoids gas hassles and still has the capacity to handle real demolition and cutting work, this is exactly the lane it was built for.

At a Glance

9 in.

Blade Diameter

3.4 in.

Cut Depth

6,600 RPM

No-Load Speed

10.6 lbs

Bare Tool Weight

Milwaukee M18 FUEL 9 in. Cut-Off Saw with ONE-KEY Kit Delivers Cordless Jobsite Control

This saw gives you the capacity of a serious cut-off tool without the usual gas-engine baggage. For crews working between outdoor demolition and indoor renovation, that means less downtime and fewer worksite limitations.

• ONE-KEY integrated for tool tracking and management
• Runs on Milwaukee M18 batteries instead of gas
• Produces no fumes, so Milwaukee says it can be used indoors

What’s in the Box

• (1) Milwaukee 2786-20 Cut-Off Saw
• (1) Diamond Blade
• (1) Abrasive Blade
• (2) M18 REDLITHIUM FORGE HD12.0 Batteries
• (1) M12/M18 Rapid Charger

Key Specifications

Battery Platform	M18
Blade Diameter	9 in.
Cut Depth	3.4 in.
Blade Arbor	7/8 in.
No-Load Speed	6,600 RPM
Motor Type	POWERSTATE Brushless
Weight	10.6 lbs
Dimensions	26.1 in. L x 7.6 in. W x 12.54 in. H

Compatibility

Battery Platform

Works on the Milwaukee M18 battery system.

Charger Compatibility

Kit includes an M12/M18 Rapid Charger for charging compatible Milwaukee M12 and M18 batteries.

Blade Interface

Uses a 9 inch blade with a 7/8 inch arbor.

M18 System Fit

According to the product description, the battery works across Milwaukee’s broader M18 system of tools.

Built For

Concrete CuttingMasonryMetal CuttingConstructionGeneral ContractingRemodelingUtility WorkDemolition

Pro Tip

If you’re switching between masonry and metal work, keep the included diamond blade and abrasive blade set aside for their specific jobs instead of trying to make one wheel do everything. You’ll get better cut speed, better control, and less frustration on the job.

Warranty & Support

Tool warranty is listed as 5 years. Milwaukee also lists a 5 Year Limited Warranty for the charger and a 3 Year Limited Warranty for the battery pack in the kit.

Tool Nut’s Take

Tool Nut’s Take

A serious cordless cut-off saw for crews done messing with gas

The Milwaukee M18 FUEL 9 in. Cut-Off Saw with ONE-KEY Kit is for guys who need real cut-off saw performance but want quicker startup, less maintenance, and better day-to-day usability.

• Who it’s for: Concrete crews, utility contractors, remodelers, and general contractors cutting reinforced concrete, masonry, cast iron, and metal on active jobsites.
• Why it stands out: You get a 9 inch cordless platform, 3.4 inch cut depth, wet-cut capability, RAPIDSTOP brake, and ONE-KEY tracking in one package.
• Worth knowing: This is a kit with batteries and charger included, which is the right way to buy a high-demand tool like this if you need it working right away.

Common Questions

• What kind of saw is this? This is a cordless cut-off saw designed for cutting reinforced concrete, metal, and masonry materials.
• What blade size does it use? It uses a 9 inch blade with a 7/8 inch arbor.
• How deep can it cut? Milwaukee lists a maximum cut depth of 3.4 inches.
• Can it be used indoors? Milwaukee states the saw produces no fumes, so it can be used indoors.
• Does it include tool tracking? Yes. The saw is ONE-KEY enabled for tracking and management.