Few power tools are as versatile as the angle grinder. Cutting metal, grinding welds smooth, sharpening blades, polishing surfaces, even cutting tile — one tool, with the right disc, handles all of it. But angle grinders also have the highest chance of a nasty accident if the wrong disc or technique is used, so choosing well and using it correctly both matter.
Angle Grinder Sizes: What the Disc Diameter Means
- 4–4.5 inch grinders — the most common size for home use, small fabrication and site work. Light, easy to control, ideal for cutting rebar, sheet metal, grinding welds and general metalwork.
- 7–9 inch grinders — heavy-duty grinders for construction, concrete cutting, and large-scale fabrication where more material needs to be removed faster.
For most workshops and home users, a 4.5-inch grinder covers nearly everything needed. Larger grinders are for bigger jobs and experienced users.
Corded vs. Cordless
Corded angle grinders deliver constant, uninterrupted power — ideal for long grinding or cutting sessions in a fixed workshop. Cordless angle grinders trade a bit of runtime for freedom of movement, which is valuable on job sites, rooftops, or anywhere a power outlet — or reliable electricity — isn't guaranteed. Ingco's cordless range is built for exactly this kind of on-site flexibility.
Matching the Disc to the Job
- Cutting discs — thin discs for slicing through metal, rebar or tile.
- Grinding discs — thicker discs for smoothing welds, removing rust, or shaping metal edges.
- Flap discs — for finishing and polishing metal surfaces to a smooth grain.
- Wire brush wheels — for stripping rust, paint or scale off metal before welding or painting.
Using a grinding disc to cut, or a cutting disc to grind sideways, is one of the most common causes of disc shattering — always match the disc to the job it's rated for.
Power & Speed
Angle grinder power is usually listed in watts (corded) or volts (cordless), alongside a no-load speed in RPM. Higher power means faster material removal but more kickback force to control — beginners are often better served by a mid-power grinder that's easier to handle steadily.
Essential Safety Practices
- Always wear safety goggles or a face shield — sparks and metal fragments move fast.
- Use gloves and hearing protection for extended use.
- Check that the disc is rated for a speed equal to or higher than the grinder's maximum RPM.
- Never remove the safety guard — it exists to deflect a shattered disc away from your body.
- Hold the grinder firmly with both hands and keep the cutting direction away from your body.
- Let the grinder reach full speed before it touches the material, and let it stop spinning fully before setting it down.
Shop Angle Grinders at Marvisons
Marvisons offers Ingco angle grinders in both corded and cordless options, from compact 4-inch models for everyday jobs to heavy-duty grinders for construction and fabrication work. Browse the full range in our Angle Grinders collection and find the right grinder — and the right discs — for your next project.