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Best DeWalt Angle Grinders: Compare Models and Features
For frequent cutting or grinding near an outlet, choose a corded 4.5-inch DeWalt angle grinder; for work away from power, a 20V MAX cordless 4.5-inch model offers better mobility, while larger 6-inch and 7-inch grinders suit deeper cuts and heavier material removal. The right DeWalt angle grinder depends less on brand than on matching disc size, motor, weight, and runtime to the job.
Quick comparison: which size and power source fit?
Weights below are approximate tool-only figures; exact weight varies by model and configuration. Cordless runtime is especially variable, so treat it as a planning estimate rather than a guaranteed cut count.
| Grinder type | Disc size | Motor or power | Approx. tool weight | Best fit |
|---|---|---|---|---|
| DeWalt corded small angle grinder | 4.5 in. (115 mm) | Typically about 7–11 amps, depending on model | About 4–5 lb | Workshop use, regular grinding, and long sessions near an outlet |
| DeWalt 20V MAX cordless small angle grinder | 4.5 or 5 in. (115 or 125 mm), model-dependent | Brushless or brushed motor, powered by a 20V MAX battery | About 4–5 lb bare; more with battery | Repairs, site work, and short cuts where cord access is awkward |
| DeWalt corded large angle grinder | 6 or 7 in. (150 or 180 mm), model-dependent | Often roughly 13 amps or more | About 10–12 lb | Deeper cutting and sustained material removal |
| DeWalt 60V MAX cordless large grinder | Typically 6 in. (150 mm), model-dependent | Brushless motor, powered by a 60V MAX battery | Heavier than a small grinder; battery adds weight | Heavy-duty work where portability matters more than all-day runtime |
These are category-level comparisons, not specifications for every tool in a range. Check the exact model’s manual and product label for rated speed, compatible disc diameter, arbor, guard, and weight. A grinder must never be run with a disc larger than its rating.
Choose by the work you actually do
For general workshop use: corded 4.5-inch
A DeWalt 4.5 angle grinder is a practical default for trimming steel, cleaning welds, removing rust, and sharpening compatible tools. Its discs are widely available, and the smaller body is easier to control than a large grinder. A corded model is usually the sensible choice if you work at a bench or make long, repeated passes: it avoids battery changes and keeps the tool ready for sustained use.
Look for a model with a comfortable side handle, a tool-free or quick-adjust guard, and a spindle lock that makes disc changes easier. Variable speed can be useful for compatible sanding or finishing accessories, but it does not make an unsuitable disc safe at a higher speed. Match the accessory’s rated RPM to the grinder.
For site repairs and occasional cuts: cordless 20V MAX
A cordless 4.5- or 5-inch grinder is easier to move around a vehicle, fence, or jobsite and eliminates the risk of cutting through an extension cord. Brushless models generally use battery energy more efficiently and avoid brush replacement, making them attractive for regular cordless work. The tradeoff is weight: the battery sits behind the motor and can make overhead or one-handed positioning tiring.
Runtime depends on battery capacity, material, disc type, pressure, and whether the tool is grinding continuously or making brief cuts. A compact battery keeps the setup lighter but is best for intermittent tasks. For longer sessions, a higher-capacity pack can reduce changeovers, though it adds bulk. If the grinder will run for hours each day, corded power may cost less and be less disruptive than keeping several batteries charged.
For deeper cuts: 6- or 7-inch grinder
A larger disc reaches farther into material and can cut deeper in one pass, making a large grinder useful for substantial steel stock, masonry work with the correct disc, or heavy grinding. It is also heavier, harder to maneuver in confined spaces, and more demanding to control. It is not a faster replacement for a small grinder on every task: the extra size can make precise trimming and short, awkward cuts harder.
Consider a large grinder only when its rated disc size and cutting depth solve a recurring problem. For occasional deep cuts, renting or borrowing a suitable tool may make more sense than storing and maintaining a heavy grinder.
How to estimate cordless runtime before buying
Battery amp-hours indicate charge capacity, not a fixed number of minutes under load. As a rough planning method, compare the work session with the kind of load: short cuts with pauses use less energy than continuous grinding, and a binding disc or excessive pressure can drain a pack faster.
For example, if a job takes 20 minutes of actual trigger time and your typical work pattern gives you roughly 10 minutes of trigger time per charge, plan on two charges, plus a spare battery if stopping to recharge would delay the job. That estimate is only useful if based on your material and technique; a battery’s advertised capacity alone cannot predict cut count. If you routinely need several uninterrupted sessions, choose corded power or budget for multiple compatible packs and a charger.
Buying decision matrix
| Your situation | Best starting point | Why |
|---|---|---|
| New user doing occasional household repairs | Corded 4.5-inch grinder | Lower complexity and no battery platform investment; manageable disc size |
| Already own DeWalt 20V MAX batteries | 20V MAX cordless 4.5- or 5-inch model | Uses existing packs and is convenient for mobile, intermittent work |
| Frequent bench grinding or repeated cuts | Corded 4.5-inch model, or larger corded grinder for deeper cuts | Continuous power avoids battery downtime; choose larger only for a real depth requirement |
| Heavy cutting away from outlets | Higher-voltage cordless grinder with suitable spare batteries | Portable, but expect more weight and higher battery costs |
| Limited storage or tight workspaces | Compact 4.5-inch grinder | Easier to store and position than a 6- or 7-inch tool |
Ownership details that affect the choice
Discs and accessories are recurring costs, and the right type matters as much as the grinder. Cutting wheels, grinding wheels, flap discs, wire wheels, and masonry discs have different purposes and limits. Use only accessories with the correct diameter, arbor, and speed rating; install the guard specified for the task, and never use a damaged or expired abrasive wheel.
On a heavily used grinder, abrasive discs wear fastest, followed by the guard and other parts exposed to sparks and dust. Keep ventilation openings clear, inspect the cord or battery contacts, and remove dust according to the manual. Do not force a cut: binding increases heat and kickback risk while wearing the disc more quickly. Hold the tool with both hands, keep the guard between you and the wheel, and secure the workpiece before starting.
Before comparing prices, check whether the tool is sold bare or as a kit. A cordless grinder without a compatible battery and charger may look less expensive but cost more to put into service. Corded models avoid that extra platform expense; cordless models make the most financial sense when you already own compatible batteries or need mobility often.
Bottom line
For most general-purpose buyers, a corded DeWalt 4.5-inch grinder is the balanced choice for cost, control, and sustained work. Pick a 20V MAX cordless model when moving freely matters and the work comes in shorter bursts. Step up to a larger disc only when you need its extra cutting depth, and account for the added weight, accessory cost, and—on cordless tools—battery demand.
