Cutting Discs
Cutting discs are what you reach for when steel, stone or block needs cutting down fast without dragging bigger kit across site.
For sparks, fab lads, builders and fitters, the right cutting disc saves time and stops rough, wandering cuts that chew through material and patience. Thin metal discs are spot on for conduit, bolts and box section, while masonry options deal with brick, block and slab trimming. If you are sorting out Power Tool Accessories or topping up your Angle Grinder Discs & Accessories, match the disc to the material and grinder size, then get stocked up properly.
What Are Cutting Discs Used For?
- Cutting threaded rod, bolts, trunking and steel conduit on first fix jobs where a grinder gets into spots a bigger chop saw cannot.
- Trimming paving, brick, block and lintel ends during landscaping, extension work and general site alteration when materials need knocking into line quickly.
- Shaping sheet metal, angle iron and box section in fabrication, gate work and maintenance jobs where a clean, controlled cut saves extra fettling after.
- Handling quick remedial cuts on refurbs, from seized fixings to old brackets, where pulling everything apart would waste half the morning.
- Backing up other angle grinder accessories so one grinder can cut, prep and finish without constant trips back to the van for different kit.
Choosing the Right Cutting Discs
Sorting the right cutting discs is simple: match the disc to the material and the grinder, not whatever happens to be left in the box.
1. Metal or Masonry First
If you are cutting steel, conduit, bolts or sheet, use metal cutting discs. If you are into brick, block, stone or slabs, use masonry cutting accessories or step up to Diamond Blades for longer life and cleaner results. Do not try making one disc do both badly.
2. Match the Disc Size to the Grinder
If your grinder takes 115mm discs, do not force the issue with bigger ones. Common 115mm and 125mm discs suit most site cutting jobs, while larger diameters are for bigger grinders and deeper cuts. Wrong size means poor guarding, unsafe running and a disc you should not be using.
3. Thin Discs for Faster Cutting
If you want quick cuts through metal with less drag, go thinner. They remove less material and usually cut faster. If the job is rougher and the disc is likely to see more abuse, a slightly heavier disc can feel less fragile in daily site use.
4. Buy for the Day, Not Just the First Cut
If you are on a run of steelwork, paving or remedials, buy enough discs to finish the shift. Nothing wastes time like nursing a worn disc through the last few cuts because no one wanted to order spares.
Who Uses These on Site?
- Sparkies use cutting discs for chopping conduit, cable tray and threaded rod cleanly during first fix, especially when working room to room and needing quick repeat cuts.
- Steel erectors, welders and fabricators keep metal cutting discs close by for trimming box section, flat bar and bolts before fitting or welding up.
- Brickies, landscapers and groundworkers reach for masonry cutting accessories when slabs, kerbs, brick and block need trimming to fit awkward returns and edges.
- Maintenance teams and fitters swear by them for site repairs, cutting off seized fixings, old brackets and damaged sections without dismantling half the job.
- General builders use angle grinder discs across refurbs and extension work because one grinder and the right disc deal with plenty of small cutting jobs fast.
Angle Grinder Accessories That Keep You Cutting
A few proper add-ons save wasted discs, rough finishes and extra clean-up once the cutting is done.
1. Diamond Blades
If you are regularly into brick, block, slab or stone, Diamond Blades last longer than basic masonry discs and hold their cut better on repeated site work.
2. Grinding Discs
After chopping steel or cleaning up weld areas, Grinding Discs help take off burrs, dress edges and sort rough spots that would otherwise catch hands, cables or paint.
3. Flap Discs
For a neater finish on metal, Flap Discs smooth and blend without the harsh gouging you can get from more aggressive abrasives, handy for visible steelwork and final prep.
Choose the Right Cutting Discs for the Job
Use this quick guide to avoid burning through the wrong disc on site.
| Your Job | Category or Type | Key Features |
|---|---|---|
| Cutting conduit, threaded rod and bolts | Thin metal cutting discs | Fast cutting, less drag, clean finish on light to medium steel sections |
| Trimming angle iron and box section | Metal cutting discs | Good control, steady tracking, suited to repeat cuts in steel |
| Cutting brick, block and pavers | Masonry cutting discs | Abrasive build for mineral materials, better suited to site rubble and hard edges |
| Frequent slab and stone work | Diamond blade | Longer working life, cleaner cuts, better value on repeated masonry work |
| General van stock for mixed snagging | 115mm or 125mm cutting discs | Fits common grinder sizes, easy to carry, covers most day to day site cutting |
Common Buying and Usage Mistakes
- Buying one type of disc for every material is a classic mistake. Metal and masonry need different cutting discs, and using the wrong one means slower cuts, faster wear and a rougher finish.
- Ignoring disc size and bore fit wastes time and can be unsafe. Always match the disc to the grinder and guard so it runs properly and gives you the cutting depth you actually need.
- Pushing too hard through the cut shortens disc life and overheats the work. Let the disc do the cutting and keep the grinder straight so you do not twist and damage the edge.
- Using worn down discs for precision work usually ends in wandering cuts and more clean-up. Once the disc is spent, change it before it starts costing you time.
- Forgetting the follow-up abrasive is another one. If the job needs edges cleaned or welds dressed, keep cutting discs alongside finishing options rather than making one disc do everything badly.
Metal Cutting Discs vs Masonry Cutting Discs vs Diamond Blades
Metal Cutting Discs
Best for steel, conduit, bolts, sheet and box section. They cut fast and clean on metal, but they are the wrong choice for brick or stone and will not last if you use them on masonry.
Masonry Cutting Discs
These are for brick, block, slab and other mineral materials where a standard metal disc will struggle. They are handy for occasional site cutting, but if you are doing a lot of masonry work, they wear quicker than diamond options.
Diamond Blades
If masonry cutting is a regular part of the job, diamond blades are the smarter buy. They last longer, cut cleaner and cope better with repeated use on harder materials, though they are not what you want for everyday steel cutting.
Cutting Discs vs Finishing Abrasives
Cutting discs are for getting through the material. If you need to tidy edges, remove burrs or prep metal after the cut, switch to grinding or flap discs rather than trying to finish with a cutting wheel.
Maintenance and Care
Keep Discs Dry
Store cutting discs somewhere dry in the van, workshop or lockup. Damp and rough storage can damage abrasive discs before they ever touch the grinder.
Check for Chips and Cracks
Before fitting a disc, give it a proper look over. If the edge is chipped, cracked or knocked about from being loose in a box, bin it and fit a sound one.
Use the Right Flanges and Guard
A good disc will still run badly if it is clamped wrong or used without the correct guard setup. Keep the grinder hardware clean and fitted properly so the disc runs true.
Do Not Keep Worn Discs for Best Work
Once a disc is heavily worn, keep it only for rough cuts if it is still safe and suitable, or replace it. For accurate work, fresh discs track better and waste less time.
Separate Cutting and Grinding Stock
Keep your cutting discs apart from other grinding accessories so the right wheel gets fitted first time. It stops mix-ups and helps you see what needs replacing before the next job.
Why Shop for Cutting Discs at ITS?
Whether you need thin metal cutting discs for first fix steelwork or masonry options for block and slab trimming, we stock the full range of angle grinder accessories in the sizes and types trades actually use. It is all in our own warehouse, in stock and ready for next day delivery, so you can order today and keep the job moving tomorrow.
Cutting Discs FAQs
What are cutting discs used for?
Cutting discs are used for slicing through metal or masonry with an angle grinder. On site that usually means bolts, threaded rod, conduit, box section, brick, block or paving. They are for cutting, not grinding, so if you need to clean up after, switch to the right finishing abrasive.
How do I choose the right cutting discs?
Start with the material, then check your grinder size. Metal wants a metal cutting disc. Brick, block and slab want a masonry disc or diamond blade. Then match the disc diameter and bore to the grinder. That is the bit that saves you buying the wrong pack and finding out halfway through the job.
Which cutting discs are best for metal or masonry?
For metal, go with thin metal cutting discs for quicker cuts through steel, conduit and fixings. For masonry, use abrasive masonry discs for lighter work, or diamond blades if you are regularly cutting brick, block, stone or slabs and want better lifespan and a cleaner cut.
How do I choose the right size cutting discs?
Use the size your grinder is built for, usually 115mm or 125mm on common site grinders. Do not oversize a disc to get extra depth. It needs to match the machine, the guard and the bore fit properly or it is the wrong disc full stop.
Can I buy cutting discs online from ITS?
Yes. You can buy cutting discs online from ITS across the metal and masonry ranges, along with the rest of your angle grinder accessories. Most lads just order enough for the week with the rest of the consumables so it all lands together ready for the next shift.
Will these cutting discs stand up to proper site work?
Yes, if you use the right disc for the job and do not abuse it. They are made for regular trade cutting, but no disc likes being twisted in the cut, dropped loose in the van or forced through the wrong material. Use them properly and they will earn their keep.
