Cut, grind and polish with DeWalt cordless grinders
Need a DeWalt cordless grinder that handles steel cutting, concrete prep and heavy grinding without being tethered to a lead? Tool Kit Depot stocks the full range across cordless, corded and FlexVolt platforms, built for tradies, metal workers and serious DIYers who demand reliability on every job.
The 18V lineup gives you the runtime and power to tackle site work without hunting for outlets. From compact 115mm models for tight spaces to 230mm beasts for serious stock removal, there's a model built to match your workflow. Pair them with XR or FlexVolt batteries, and you've got the grunt to cut rebar, strip rust or prep welds all day long.
If you're working near power or prefer the consistent torque of mains voltage, the corded range delivers serious amperage for demanding applications. These units handle prolonged cutting sessions and heavy material removal without battery swaps, ideal for workshop setups or fabrication tasks.
The FlexVolt models bring serious versatility, switching between 18v and 54v depending on the battery you slot in. That means more power when you need it and compatibility across your existing DeWalt battery ecosystem. Whether you're grinding back welds, cutting through bluestone pavers or prepping steel beams, these tools deliver the performance you need without compromise.
Shop our DeWalt angle grinders online or drop into your nearest Tool Kit Depot – we're your ultimate DeWalt power tool destination.
DeWalt cordless grinder FAQ
What's the difference between DeWalt 18v and FlexVolt grinders?
DeWalt 18v models run on standard XR batteries and deliver solid performance for general grinding, cutting and prep work. FlexVolt grinders automatically switch between 18V and 54V depending on the battery, giving you more power for heavy-duty tasks like prolonged cutting or stock removal. If you're already running DeWalt XR batteries, the 18V range keeps things simple. If you need maximum grunt and already have FlexVolt batteries in your kit, the FlexVolt models bring serious torque to the table.
How long does a DeWalt battery grinder run on one charge?
Runtime depends on battery capacity and the job you're doing. A 5.0Ah XR battery typically delivers 20–40 minutes of continuous grinding or 50+ cuts through 12mm rebar. For extended site work, a 6.0Ah or 9.0Ah FlexVolt battery can push runtime well past an hour under moderate load. Heavy applications like concrete cutting or prolonged steel grinding will drain batteries faster, so it's worth keeping a spare charged and ready.
Can I use my existing DeWalt batteries with a new grinder?
Yes, as long as you're running 18v XR or FlexVolt batteries. All DeWalt cordless grinders use the same battery platform, so your existing batteries and chargers work straight away. FlexVolt batteries also work in 18V models but run at 18V output. They won't deliver the higher voltage unless you're using a FlexVolt tool. This means you can build your kit around one battery system and swap batteries across tools as needed.
What size grinder do I need for cutting steel or concrete?
For general steel cutting, grinding welds or prepping surfaces, a 115mm or 125mm model handles most tasks with good control and manoeuvrability. If you're cutting thick steel, removing heavy material or working with concrete, a 230mm unit gives you the disc size and power to get through tougher jobs faster. Smaller grinders suit tight spaces and detail work, while larger models are better for demolition, heavy fabrication or site prep.
Are DeWalt corded grinders more powerful than cordless?
Corded models deliver consistent power without battery limitations, making them ideal for prolonged heavy-duty use in workshops or fabrication environments. They don't lose torque as you work and can handle high-amperage applications without runtime concerns. Cordless models offer unmatched mobility and convenience on site, with FlexVolt grinders delivering comparable power to corded units for most jobs. If you're working near power and doing sustained grinding, corded is a solid choice. If you need to move freely around a site, cordless gives you the flexibility without compromising performance.
Shop online or visit your nearest Tool Kit Depot for more DeWalt power tools today!
All prices include GST. Prices & specifications subject to change without notice. Freight & shipping at additional cost.
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