AOBEN 21V Cordless Angle Grinder, 4-1/2-Inch Brushless, 3-Speed

Some projects call for a grinder that can move easily between cutting and finishing, while others need more flexibility around awkward work angles. The AOBEN 21V cordless angle grinder combines a brushless motor, a rotating body and a two-battery setup for metalworking, repairs and DIY tasks.

Its 4-1/2-inch disc format supports familiar cutting and grinding jobs, and the adjustable body helps position the tool for different approaches. With a charger and two 4.0Ah batteries in the kit, it’s set up for work that benefits from a cordless tool and a ready-to-use battery supply.

Key specifications

• Type: Cordless angle grinder and cut-off tool
• Power: 21V battery powered
• Motor: Brushless, with a no-load speed of up to 9,500 RPM
• Speed control: 3-speed gearbox
• Disc size: 4-1/2 inches
• Spindle: 5/8"-11 with 7/8" arbors
• Body: Rotates 90° left or right to help adjust the operating angle
• Switch: Paddle switch
• Battery setup: Two 4.0Ah batteries with an integrated charge-level indicator

The brushless motor and three-speed gearbox provide control for different materials and tasks, from cutting to polishing. The rotating body offers another way to orient the grinder when the workpiece or access angle changes. Check that the disc you plan to use matches the grinder’s size and spindle specifications. Battery packs from other brands are not compatible with this tool.

Best use cases

This grinder is suited to metal cutting, grinding and surface work around a workshop, garage or job site. Use it for tasks such as cutting rebar or metal pipe, grinding welds, and removing rust or paint. For a repair involving bolts or steel bar, the cordless format makes it practical to move between the workpiece and the next cut without managing a power cord. The rotating body can help set a more comfortable angle when working in a confined area or changing between cutting positions.

The same tool also supports polishing and work on materials such as tile, masonry and wood, as described for the product. Its three-speed gearbox gives you settings to select for the task, while the battery indicator provides a quick way to check charge status. Compared with a workflow built around a corded grinder, this battery-powered setup is useful when moving around the work area is part of the job.

Included in the package

The kit includes the cordless angle grinder, two 4.0Ah batteries and a fast charger. The dual-battery setup gives you a second battery to use as you rotate between charging and work, and the charge-level indicator helps you keep track of battery status.

Buying verdict

Choose the AOBEN 21V grinder for a cordless setup that covers cutting, grinding and polishing with one 4-1/2-inch tool. Its brushless motor, three speed settings and adjustable body are practical features for varied workshop and job-site tasks, while the included batteries and charger make the kit especially suited to users who want the grinder and its battery supply together.