Cut Off Tool vs Die Grinder: Which One Should You Buy?

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Below: what each tool does, how they compare, the four cut off tools in this data, and what to check before you buy.

Cut off tool vs die grinder: what each one does

A cut off tool is a slim grinder built around a thin cutting wheel. The four listings here are 3 inch and 4-1/2 inch cordless and corded grinders that cut metal, tile and wood with a spinning disc. You push it in a straight line and the wheel does the work.

A die grinder is a rotary tool that spins small burrs, stones or carbide cutters at high speed for grinding, porting, weld cleanup and detail shaping. It removes material a little at a time instead of slicing through it. Think of it as a heavy duty rotary tool for metal, not a saw.

Figures are manufacturer rated as listed, collected 21 October 2026. The die grinder column is general guidance; the four listings in this data are all cut off tools.

The cut off tools in this data

Four cut off tools, ranked by our scores.

AOBEN 4-1/2 inch cordless

The AOBEN is a 21V cordless angle grinder with a brushless motor, 3 adjustable speeds up to a maximum of 9500 RPM, and two 4.0Ah batteries with a charger. It states 7/8 inch arbors and a 5/8-11 spindle, includes 2 wheel guards, 2 cutting wheels, 2 grinding wheels and 2 sanding wheels, and its smart chip triggers overload and overheating protection. Item weight is listed as 4.82 kg.

Milwaukee M18 cut-off grinder

The Milwaukee 2686-20 is an 18V brushless 4-1/2 / 5 inch cut-off grinder delivering 11,000 RPM with a paddle switch, tool-free guard adjustment, overload protection and an electronic clutch. The listing states a manufacturer warranty with no term given. It measures 12.87 by 10.71 by 4.29 inches.

TEENO 3-inch cordless

The TEENO is a compact 3-inch cordless cut off tool on a 16.8V system with two 2000mAh batteries, spinning at 19,500 RPM with a maximum cutting depth of 1/2 inch. It states a dual-action safety system that needs two buttons to start, a 90 degree adjustable guard, and a kit with 6 discs, charger, gloves, wrench and case. Item weight is 3.7 pounds.

SHALL 4-1/2 inch corded

The SHALL is a corded 4-1/2 inch angle grinder with a 4 amp, 500 watt motor at 11,000 RPM no-load speed. It states 2 wheel guards, a slide switch with lock-off and lock-on, a 2-position non-slip side handle, 7/8 inch arbor with 5/8-11 spindle, and a kit with 3 cutting wheels, 3 flap discs, 2 carbon brushes and a wrench. Item weight is stated as 3.7 pounds in the bullets.

When to pick a cut off tool

• Cutting bolts, rods and pipe. A thin wheel slices through fasteners and stock faster than any burr.
• Straight cuts in sheet and tile. The AOBEN lists metal, steel, tile cutting and surface prep among its uses.
• Tight plumbing spaces. The TEENO 3-inch is built for cramped corners with one-hand control.
• No compressor. All four here are battery or corded electric, so there is no air line to run.

When to pick a die grinder

• Weld cleanup and deburring. A burr smooths beads and edges where a wheel is too wide.
• Porting and shaping. Grinding inside ports, dies and castings is die grinder work.
• Detail metal removal. Small stones and burrs reach spots a 3 inch wheel cannot.
• You already own a compressor. Air die grinders are the classic pairing for a shop with air.

What to check before you buy

• Disc size and arbor. The AOBEN and SHALL state 4-1/2 inch wheels with 7/8 inch arbors; the TEENO is a 3-inch tool. Match discs to the tool.
• RPM. The listings state 9500 RPM for the AOBEN, 11,000 RPM for the Milwaukee and SHALL, and 19,500 RPM for the TEENO.
• Guards. The AOBEN and SHALL each include 2 wheel guards, the TEENO a 90 degree adjustable guard, and the Milwaukee a tool-free adjustable guard.
• Battery or cord. The TEENO, AOBEN and Milwaukee are battery powered; the SHALL is corded electric with a 4 amp motor.

Frequently Asked Questions

Can a die grinder cut metal like a cut off tool?

It can remove metal, but slowly. A die grinder with a burr grinds and shapes; for slicing through a bolt or pipe, the cut off tool’s thin wheel is the right tool.

Can a cut off tool grind like a die grinder?

Angle grinders grind with a grinding wheel, and the AOBEN kit includes 2 grinding wheels. For detail shaping and weld cleanup in tight spots, a die grinder’s small burrs work better.

What size disc do these cut off tools use?

The TEENO uses 3-inch discs, and the AOBEN, Milwaukee and SHALL use 4-1/2 inch wheels, with the Milwaukee also fitting 5 inch. All four listings include at least one guard.

Are these cut off tools cordless?

Three are battery powered: the TEENO at 16.8V, the Milwaukee at 18V and the AOBEN at 21V with two 4.0Ah packs. The SHALL is corded electric.

Which is safer, a cut off tool or a die grinder?

Both need eye protection and clamped work. Cut off tools throw more sparks and their wheels can shatter if pinched; the TEENO states a dual-action switch to prevent accidental starts, and the AOBEN states overload and overheating protection.

Related: die grinder vs angle grinder, cordless vs air cut off tool, die grinder vs rotary tool, and air hammer vs cut off tool.