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Diamond cup wheel for a concrete floor

Updated: 21 October 2026

The job people describe is a door that catches on a ridge, a screed hump, or tile adhesive that will not scrape. A diamond cup wheel on a concrete floor can take that lip off. It can also eat several discs and still leave a room that needs a hired floor grinder. Fitting and the silica steps are in [how to use a diamond cup wheel](/hub/sanders/diamond-cup-wheel/sub/diamond-cup-wheel-how-to-use). The [diamond cup wheel comparison](/hub/sanders/diamond-cup-wheel) names the cups. Peter F. used amazon.co.uk reviews and HSE's grinding guidance, with prices from 19 October 2026. We did not measure a slab. Every area figure below is one reviewer's job. A qualifying purchase can earn a commission at no extra cost to you.

The job people describe is a door that catches on a ridge, a screed hump, or tile adhesive that will not scrape. A diamond cup wheel on a concrete floor can take that lip off.

Our top picks

BRSCHNITT BRSCHNITT 115 mm double row

Best overall

BRSCHNITT BRSCHNITT 115 mm double row
8.2/10about £15.99
View offer
BRSCHNITT BRSCHNITT 115 mm turbo row

Rank 2

BRSCHNITT BRSCHNITT 115 mm turbo row
8.4/10about £16.99
View offer
SHDIATOOL SHDIATOOL 115 mm turbo row

Rank 3

SHDIATOOL SHDIATOOL 115 mm turbo row
8.6/10about £18.99
View offer
On this page
  1. 1.The jobs these cups actually did
  2. 2.One cup is not a floor grinder
  3. 3.Indoor floors throw silica
  4. 4.Which listing is even aimed at concrete
  5. 5.When to hire

The jobs these cups actually did

The reviews cluster around small, local concrete. SHDIATOOL buyers mention thresholds, bricks, mortar, floor high spots and tile adhesive. One disc skimmed a large sand-and-cement screed and still showed diamond. The BRSCHNITT turbo turns up on adhesive and on a doorway ridge. QWORK's 125 mm reviews mention concrete lumps and adhesive. A turbo row and a double row are both sold for concrete. Which photo looks smoother is on the turbo row versus double row page. A pattern cannot turn an angle grinder into a floor grinder.

One cup is not a floor grinder

Three anecdotes mark the limit, and none is a rated life. One SHDIATOOL review describes a screed skim of about 60 m² on a single disc. One BRSCHNITT turbo review used five discs on about 25 m² of uneven floor. One worksky review wore the cup out before half the job. We will not turn 60 m² into a capacity. One lip, one threshold or a patch of adhesive can be an angle-grinder job. A measured whole slab is a hire conversation. A 115 mm face is only a few centimetres wide.
BRSCHNITT BRSCHNITT 115 mm double row

Testsieger

BRSCHNITT BRSCHNITT 115 mm double row
8.2/10about £15.99
View offer

Indoor floors throw silica

Floor grinding without extraction is the task HSE points at on its scabbling and grinding page. Respirable crystalline silica from concrete has a workplace exposure limit of 0.1 mg/m³ over eight hours. The controls are on-tool extraction at M or H class and a mask at APF 20. A household vacuum with a HEPA bag is not that extractor. One SHDIATOOL review found a cup about 22 mm high would not meet a third-party shroud until the shroud was modified. If they do not close, change the shroud.

Which listing is even aimed at concrete

The 115 mm cups we kept name concrete. SHDIATOOL at £18.99 is 4.4 from 426. The BRSCHNITT turbo at £16.99 is 4.5 from 446, and the double row at £15.99 is 4.6 from 129. HIGHDRIL, KURSTOL and Yikuneng name concrete too, with the thin files and speed clashes on the best diamond cup wheel for concrete page. Bujingyun's packs are 100 mm, a poor match for a 115 mm floor pass. QWORK at £7.98 is 125 mm and states no maximum rpm. If your grinder is 115 mm, stay with a 115 mm cup that states 22.23 mm and one speed.

When to hire

Hire a floor grinder when the area is the whole slab, when you do not know the depth, or when you cannot set up extraction and a proper mask. A doorway ridge you can cover with one hand can stay on the angle grinder. A room you want flat enough for vinyl is the hire. Underfloor heating is a reason to stop. worksky's reviews include that prep. You cannot see the pipes.

Common questions

Can I grind a concrete floor with an angle grinder?
You can grind a local high spot, a threshold or a patch of adhesive with a diamond cup on an angle grinder. A whole room is a different task. The cup face is narrow, the dust is silica, and single reviews already describe several discs on one uneven floor. Keep the guard on, and use extraction built for the job.
Will one cup level a room?
No square-metre life is established here. One SHDIATOOL review describes about 60 m² of screed skim on one disc. One BRSCHNITT turbo review used five discs on about 25 m². One worksky review ended before half the job. Those are single accounts. Plan on one cup for a lip, and on a hire if the straight edge has to be true across the room.
High spot or whole slab: where is the line?
A high spot you can see, where a straight edge rocks in one place, can be an angle-grinder job. A slab you are trying to level as a surface is the hire. You have crossed the line when a second cup is fitted and the floor still rocks, or when you are cutting a dish beside the original hump. Unknown depth is a reason to stop before the first pass.
Will it remove tile adhesive?
Reviews on SHDIATOOL, the BRSCHNITT turbo and QWORK mention adhesive coming off. That is a local patch, the same scale as a lip. Thick adhesive across a whole floor brings the same dust and the same extra discs as a whole slab. Grit 40 or 40/50 is the coarse face those listings sell for that removal.
Do I need a dust shroud indoors?
If you are grinding concrete in a room you still use, yes. HSE wants the hood close to the work, an M-class or H-class extractor, and a mask at APF 20. One SHDIATOOL review found a low cup would not meet a third-party shroud until the shroud was altered. If they do not meet, change the shroud. Leave the guard on.
What about a 125 mm grinder on a floor?
QWORK at £7.98 and worksky at £18.99 are the 125 mm cups here. QWORK has the large review file and no stated maximum rpm. worksky does not state a bore, and one review wore it out early. A 125 mm face covers slightly more per pass. It is still an angle grinder, and a whole slab remains a hire.

Related pages

Diamond cup wheel buying guide

Diamond cup wheel

Best diamond cup wheel for concrete on a 115 mm grinder

How to use a diamond cup wheel: guard, speed and dust

Turbo row vs double row diamond cup: which rim fits

Sources

Sources taken from the research digest. Prices, stars and review counts are the stored amazon.co.uk listing figures for 19 October 2026.

  1. HSE — scabbling or grinding (retrieved 19.10.2026)
  2. HSE INDG463 — silica dust (retrieved 19.10.2026)
  3. HSE CIS69 — on-tool extraction (retrieved 19.10.2026)
  4. HSE ST3 — stonework controls (retrieved 19.10.2026)
  5. HSE HSG17 — abrasive wheels (retrieved 19.10.2026)
  6. BSI BS EN 13236:2019 (retrieved 19.10.2026)
  7. oSa — EN 13236 marking note (retrieved 19.10.2026)
  8. FEPA — diamond dish cups (retrieved 19.10.2026)
  9. amazon.co.uk — concrete grinding disc (retrieved 19.10.2026)