Power Angle Grinders

Select by wheel diameter and motor power: 4–5 inch grinders are good for light cutting and grinding, 7–9 inch for heavy masonry and metal; higher amperage (corded) or higher volts and brushless motors (cordless) deliver more sustained power. Match size and power to the materials and tasks you plan to do

Corded models offer continuous power for long jobs and typically more torque, while cordless models provide mobility and convenience; choose cordless if you need portability and check battery voltage/capacity for runtime, otherwise choose corded for heavy-duty or extended use

Look for a removable side handle, adjustable guard, spindle lock for safe disc changes, anti-kickback or electronic torque control, and restart protection to prevent accidental starts after power loss. Always use appropriate personal protective equipment regardless of features

Match the disc diameter to the grinder's rated wheel size and choose the disc material for the task: grinding wheels for metal removal, cutoff wheels for cutting metal, diamond blades for masonry/concrete, and flap discs for finishing. Verify rpm compatibility between disc and tool

Regularly clean vents, inspect and replace worn brushes or bearings per manufacturer guidance, check the guard and handle for damage, and store with the disc removed or covered. Lubricate spindle threads if recommended and replace worn discs immediately

Prices vary by power, brand, and features; expect budget options under $50 for basic small grinders and mid-range to professional tools averaging around $90, with heavy-duty or branded cordless kits costing more. Factors affecting price include motor type (brushless vs brushed), build quality, and included batteries or accessories

Most accessories follow common standards for disc diameter and arbor size, but confirm the grinder's arbor/thread size and maximum rpm before buying discs, backing pads, or guards; some proprietary accessories or battery platforms may only fit the same brand