Cordless vs Air Cut Off Tool: Which One Should You Buy?

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Cordless vs air cut off tool: the real difference

A cordless cut off tool carries its power with it. The Milwaukee 2522-20 states 12V battery power and 20,000 rpm, the 2522-21XC listing states 24V in its title and spec table with 20,000 rpm in the table, and the Ecarke states 20V power with three speeds at 10,000, 15,000 and 18,000 rpm. You grab it, cut, and put it back; the battery is the limit, and a dead pack means a pause.

An air cut off tool has no battery to drain, but it is tethered to a compressor that must feed it steady air for the whole job. None of the three listings here is an air tool, so no CFM figures are stated in this guide. If your compressor already runs your impact wrench and die grinder all day, adding an air cut off tool costs little; if you have no compressor, cordless skips that purchase entirely.

Three cordless cut off tools, compared

Milwaukee 2522-20, bare tool. A 12V bare tool (battery not included) with a stated 20,000 rpm, a brushless motor, reversible blade rotation and Redlink Plus overload protection. The listing states an ergonomic grip for one-handed cutting control, dimensions of 8.9 by 6.9 by 4.5 inches and a weight of 1.2 kg. The warranty description reads only “Manufacturer Warranty”, which states no term.

Milwaukee 2522-21XC, kit. A 3 inch compact cut off tool kit with an XC 4.0 battery and charger in the box, stated at 20,000 rpm with 11 items included. One wrinkle: the title prints “1.5E+3 RPM” where the spec table states 20,000 rpm; the guide trusts the table. The title and spec table both state 24V, which is what the listing says. No warranty term is stated.

Ecarke 4 inch, DeWalt 20V compatible. A 20V brushless tool that runs on a DeWalt 20V battery, with the battery not included. It states three speeds (10,000, 15,000 and 18,000 rpm), four 4 inch blades in the box, a tool-free spindle lock, forward and reverse control and a built-in safety switch. Weight is stated as 2.9 pounds in the bullets and 2.8 pounds in the table. It is the only one of the three with a stated warranty term: 1 YEAR.

Matching rpm and blade to the material

Speed is stated for all three tools. Both Milwaukee listings state 20,000 rpm in their spec tables, and the Ecarke states three speeds at 10,000, 15,000 and 18,000 rpm. The Ecarke’s speed control is the practical one here: slower speeds for materials that melt or load the blade, like plastic, and full speed for metal. The Milwaukee listings state a single speed, so the material match comes from the blade you mount rather than a speed setting.

Blade size decides what the tool can reach through. The Ecarke states a 4 inch blade with four blades in the box, plus a tool-free spindle lock for fast changes. The Milwaukee 2522-21XC is a 3 inch compact tool. Neither Milwaukee listing states a blade count in the box, so plan on buying blades separately for those two. The 2522-20 adds reversible blade rotation, which the listing frames as cutting control; the Ecarke adds forward and reverse with an instant-direction switch for the same reason.

Battery platform and what is in the box

Check the box before you count the cost. The Milwaukee 2522-20 is a bare tool: the included components read unit plus instruction guide, with no battery. The 2522-21XC is the kit version, with an XC 4.0 battery and charger in the box and 11 items included. The Ecarke is tool only and runs on a DeWalt 20V battery that is not included, so it suits a buyer who already owns DeWalt 20V packs. If you own no batteries on any of these platforms, the kit is the honest price; if your shelf already holds the packs, the bare tool is the cheaper way in.

Weight matters for overhead and one-handed work. The Ecarke states 2.9 pounds in the bullets and 2.8 pounds in the spec table, and the 2522-20 states 1.2 kg. The 2522-21XC states no weight, so the guide leaves that open. The Ecarke also states a rubberized overmold grip and a built-in safety switch against accidental starts, while the Milwaukee 2522-20 states an ergonomic grip for one-handed control.

What an air tool needs from your shop

An air cut off tool needs a compressor, a hose and steady air delivery; without them it is a paperweight. That is the whole trade: cordless tools ask for charged batteries, air tools ask for a compressor that is already there and sized for the job. The listings here state no CFM figures, so size your compressor from the air tool’s own manual, not from this guide.

Frequently Asked Questions

Do I need a compressor for a cordless cut off tool?

No. All three tools here are battery powered: the Milwaukee 2522-20 states 12V, the 2522-21XC listing states 24V, and the Ecarke states 20V compatibility. A compressor only enters the picture if you choose an air tool instead.

Which spins faster?

Both Milwaukee spec tables state 20,000 rpm. The Ecarke states three speeds up to 18,000 rpm. No air tool figures are stated in these listings.

Bare tool or kit?

The Milwaukee 2522-20 is a bare tool with no battery stated in the box. The Milwaukee 2522-21XC is a kit with an XC 4.0 battery and charger. The Ecarke is tool only, with the DeWalt 20V battery not included.

What does an air cut off tool need?

A compressor with steady air delivery, plus a hose and fittings. None of the listings here states CFM figures, so check the air tool’s manual against your compressor before buying. The cordless side has no such homework: the Milwaukee kit brings its own 4.0 Ah battery and charger, and the Ecarke runs on DeWalt 20V packs you may already own. If your shop already has a big compressor running all day, an air tool adds no battery cost; if it does not, the cordless tools here skip that whole purchase.

Do any of these state a warranty?

The Ecarke states a 1 YEAR warranty. The Milwaukee 2522-20 warranty description reads only “Manufacturer Warranty” with no term, and the 2522-21XC states no warranty term.

Related: cordless vs air impact wrench and our air tools hub.