Angle Grinders
Angle grinders are the go-to for cutting metal, chasing out block, cleaning welds and knocking back rough edges on hard site jobs.
If you're cutting steel on first fix, trimming bolts flush, or raking out masonry, angle grinders earn their keep fast. Go 115mm angle grinders for lighter one-handed work, 230mm angle grinders for deeper cuts, and choose between cordless angle grinders or corded angle grinders based on how fixed your work area is.
What Are Angle Grinders Used For?
- Cutting threaded rod, steel box section, rebar and bolts on site is where a metal cutting angle grinder saves time, especially when a chop saw is too bulky to drag around.
- Chasing out mortar joints, trimming slabs, and cutting block or brick is proper masonry angle grinder work, provided you match the tool size and the angle grinder discs to the material.
- Grinding back welds, cleaning rust off gates, and fettling rough steel before paint makes angle grinders a standard bit of kit for fabricators, fitters, and maintenance crews.
- Stripping old paint, smoothing concrete edges, and cleaning up snagging work after installs is easier with the right disc, guard setup, and a grinder that suits the job length.
- Working up ladders, across scaffold, or out in the yard is where cordless angle grinders come into their own, while bench work and long heavy cuts still suit corded angle grinders.
Who Uses These on Site?
- Metalworkers, steel erectors, and fabricators use angle grinders for cutting stock, dressing welds, and cleaning edges before fitting or painting.
- Brickies, groundworkers, and landscapers reach for masonry angle grinder setups when cutting block, slab, kerb and coping, especially where a bigger saw is overkill.
- Sparkies and plumbers keep 115mm angle grinders handy for quick cuts on tray, trunking, threaded rod, brackets and stubborn fixings during first fix.
- Maintenance teams and site fitters swear by cordless angle grinders for repair work, plant guards, seized bolts and awkward jobs where dragging leads is just extra hassle.
- General builders and serious DIY users use them for everything from trimming steel lintels to cleaning up masonry, but they only work properly when the disc matches the task.
Choosing the Right Angle Grinders
Sort the grinder around the job first. Do not buy a big 230mm machine for light snagging, and do not expect a small one to handle deep masonry cuts all day.
1. 115mm vs 230mm
If you are doing lighter cutting, cleaning welds, trimming metal, or general fitting work, 115mm angle grinders are easier to control and less tiring overhead. If you need depth for slab, block, heavy steel or tougher site demolition work, 230mm angle grinders are the better shout.
2. Cordless vs Corded
If you are moving round site, up scaffold, or doing short burst cuts, cordless angle grinders save a lot of faff. If you are on longer grinding jobs, workshop prep, or repeated heavy cuts, corded angle grinders still make more sense because you are not watching battery life.
3. Disc Type Matters More Than Most People Think
Do not treat all angle grinder discs as the same. Thin cutting discs are for slicing through metal cleanly, grinding discs are for stock removal, diamond blades suit masonry, and polishing or flap discs are for finishing. Wrong disc, and you waste time, burn through consumables, or make the tool feel worse than it is.
4. Power and Control
If it is occasional trimming and light fabrication, a smaller grinder is plenty. If you are grinding welds flat, chasing hard materials, or cutting thicker sections day in, day out, buy more motor and better vibration control rather than replacing a tired under-specced tool later.
The Basics: Understanding Angle Grinders
An angle grinder is simple in use, but the setup changes what it is actually good at. The key thing is size, power source, and disc choice, because that is what decides how it behaves on site.
1. Grinder Size Changes the Job
Smaller grinders like 115mm angle grinders are easier to handle for quick cuts, overhead work, and tighter spaces. Larger 230mm angle grinders give you more cutting depth and suit heavier masonry or steel jobs, but they are bulkier and need both hands on them.
2. The Disc Does the Real Work
The machine spins fast, but the angle grinder discs decide whether you are cutting, grinding, sanding, or polishing. That means the same grinder can do very different jobs, as long as the disc is rated correctly for the material and speed.
3. Corded and Cordless Work Differently on Site
Cordless angle grinders are built for mobility and quick access where leads get in the way. Corded angle grinders are still the safer bet for sustained heavy work, where constant power matters more than moving freely round the job.
Angle Grinder Accessories That Save Time on Site
The right extras stop wasted cuts, burnt discs, and trips back to the van halfway through the job.
1. Cutting and Grinding Discs
Get the right angle grinder discs in the van before you start. Thin metal cutting discs, grinding discs, flap discs and diamond blades all do different jobs, and using the wrong one is the fastest way to slow the work down.
2. Spare Batteries and Chargers
For cordless angle grinders, a spare battery is not optional if you are using them properly. You do not want the grinder dying halfway through a cut when you are up steps, on scaffold, or working away from power.
3. Guards and Dust Shrouds
A proper guard setup matters for both safety and finish. Dust shrouds are worth having for masonry work because they cut the mess down massively and make life easier when you are working indoors or on refurbs.
4. Backing Pads and Polishing Attachments
If you are cleaning steel, refining finishes, or taking back marks without digging into the material, backing pads and polishing accessories give the grinder a second life beyond rough cutting.
Choose the Right Angle Grinders for the Job
Use this quick guide to match the grinder to the work in front of you.
| Your Job | Angle Grinder Type | Key Features |
|---|---|---|
| Cutting tray, threaded rod, bolts and light steel on first fix | 115mm cordless angle grinder | Compact body, quick start, easy one handed control, no lead to drag about |
| Grinding welds and cleaning steel in the workshop or on install jobs | 115mm corded angle grinder | Steady power, lighter overall feel for long use, suits grinding and flap discs |
| Cutting block, brick, slab or chasing harder materials | 230mm angle grinder | Greater cutting depth, two handed control, better for bigger diamond blades |
| General repair work round site and awkward access cuts | Cordless angle grinder | Portable, fast to grab, ideal where power is limited or access is tight |
| Long heavy cutting or grinding sessions at a fixed bench or bay | Corded angle grinder | Constant output, no battery downtime, better for repeated hard use |
Common Buying and Usage Mistakes
- Buying purely on disc size and ignoring the actual job usually ends with too much grinder for light work or not enough tool for deep cuts. Match the machine to the material, cut depth and how long you will be using it.
- Using the wrong disc for the task is one of the biggest time wasters on site. A cutting disc is not a grinding disc, and forcing one to do both gives poor results, faster wear and more risk.
- Choosing cordless for all-day heavy grinding without enough batteries catches plenty of people out. If the work is constant and fixed in one area, corded often makes more sense.
- Ignoring guard position, kickback control and restart protection is asking for trouble. Safety features are not box ticking extras when the disc binds or the grinder gets knocked between cuts.
- Trying to make a small grinder do big masonry work usually means slow progress, overheated discs and a rough finish. Step up to a 230mm machine when the material and depth demand it.
Cordless Angle Grinders vs Corded Angle Grinders vs 230mm Angle Grinders
Cordless Angle Grinders
Best where access is awkward, the cut is quick, or you are constantly moving round site. They are ideal for first fix metalwork, maintenance jobs, and repairs, but for long heavy grinding they rely on having enough battery behind them.
Corded Angle Grinders
These suit bench work, repeated cuts, and longer grinding sessions where steady power matters more than mobility. If you are in one bay all day dressing steel or cutting repeatedly, corded is still hard to beat.
115mm Angle Grinders
Smaller grinders are easier to handle, quicker to position, and better for lighter site jobs. They are the usual pick for sparks, plumbers, fitters and snagging work, but they are not built for deep masonry cuts.
230mm Angle Grinders
This is the one for heavier cutting depth in steel, slab, block and masonry. They are bulkier and less forgiving in tight spots, but when the job needs reach and proper material removal, a small grinder just will not keep up.
Maintenance and Care
Keep Vents Clear
Blow dust out of the motor vents regularly, especially after masonry work. Fine dust builds up fast and cooks the tool if you just sling it back in the box after every shift.
Check Discs Before Every Use
Look for chips, cracks, damp storage damage and wear before fitting any disc. If a disc looks suspect, bin it. It is cheaper than replacing guards, worktops, or worse.
Clean the Guard and Flanges
Packed-in debris around the guard and flanges throws things off and makes disc changes harder than they need to be. Wipe it down and keep the clamping faces clean so discs seat properly.
Store Dry and Protected
Do not leave grinders loose in the van under wet gear and loose discs. Keep them dry, keep the cable or batteries protected, and store discs flat and clean so they are not damaged before the next job.
Repair Worn Parts Early
If the switch gets sticky, the guard will not lock properly, or the spindle lock is playing up, sort it before it turns into a dead tool on site. Small faults on grinders get expensive quickly if ignored.
Why Shop for Angle Grinders at ITS?
Whether you need compact 115mm angle grinders for quick metal cuts, 230mm angle grinders for heavier masonry work, or the right angle grinder discs and accessories to keep moving, we stock the full range. It is all in our own warehouse and ready for next day delivery, so you can get the right grinder on site without hanging about.
Angle Grinder FAQs
What is an angle grinder used for?
It is mainly used for cutting, grinding, cleaning and finishing metal or masonry. On site that means cutting bolts, threaded rod and steel, grinding welds flat, trimming block or slab, raking out mortar, and cleaning rust or paint depending on the disc fitted.
What size angle grinder should I choose?
For most day to day fitting, metal trimming and general use, 115mm angle grinders are the easier tool to live with. If you need deeper cuts in block, slab, brick or heavier steel, go up to 230mm angle grinders because a small grinder will feel undergunned very quickly.
Can angle grinders cut metal and masonry?
Yes, they can do both, but only with the correct disc. Use metal cutting discs for steel and fixings, and diamond or masonry-rated discs for brick, block, slab and similar materials. The grinder itself is only half the setup. The disc choice is what makes it work properly.
Should I choose a corded or cordless angle grinder?
Go cordless if you are moving around site, working at height, or making shorter cuts where speed and access matter. Choose corded if the work is heavier, longer, and mostly in one place. For repeated grinding and long cuts, corded still saves battery swapping and downtime.
What disc do I need for cutting, grinding, or polishing?
Thin cutting discs are for slicing through metal cleanly. Grinding discs are for removing material and dressing welds. Flap discs are good for blending and tidying surfaces. Diamond blades are the usual choice for masonry. Polishing pads and backing pads are for finer finishing work. Do not mix them up because performance drops off fast.
What safety features should I look for in an angle grinder?
Look for a solid adjustable guard, anti kickback control, soft start, restart protection, and a side handle that gives you proper control. Those are the features that matter when the disc binds, the tool twists, or power drops out mid job. They are worth paying for on anything used regularly.
How powerful should an angle grinder be for heavy-duty jobs?
For heavy cutting, long grinding sessions, and tougher masonry work, buy more power than you think you need. A lightly specced grinder may cope with occasional use, but on repeated hard jobs it will slow down, heat up, and wear out quicker. Bigger disc sizes and tougher materials usually need a stronger motor to stay productive.
Which angle grinder is best for DIY use?
For most DIY jobs, a 115mm grinder is the sensible place to start because it is easier to control, easier to store, and covers the usual cutting and grinding tasks around the house or garage. Just make sure you buy the right discs for the material and do not confuse light DIY use with heavy masonry cutting all weekend.
