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Brushless angle grinders outperform brushed models in almost every way. The motor uses magnets instead of carbon brushes meaning less friction, less heat and a longer lifespan overall. You also get more runtime per charge which matters on bigger jobs.
For cordless angle grinders the battery platform is worth thinking about before you buy. If you already own tools from a specific brand sticking to that ecosystem saves money on batteries. Most 18V models handle everyday cutting and grinding tasks with ease. Heavy fabrication work may push you towards a 60V or twin-battery option.
Disc size is the other key decision. A 115mm grinder is lighter and easier to control in tight spaces. A 230mm model removes material faster but adds weight. The 125mm size sits in the middle and is the most popular choice for general use.
Look for variable speed control if you work with different materials. Grinding stone or aluminium needs a slower disc speed than cutting steel. An electric brake and anti-kickback protection are safety features worth having on any angle grinder you use regularly.
