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Diamond cutting disc for porcelain

Updated: 21 October 2026

You are cutting rectified bathroom tile, or a 20 mm outdoor porcelain slab, on a 115 mm angle grinder, and the edge people will see is the part that chips. A diamond cutting disc for porcelain is a thin turbo or mesh rim, used slowly, with the guard on. It is not a segmented masonry blade, and it is not a promise of a chip-free cut. The [diamond cutting disc comparison](/hub/sanders/diamond-cutting-disc) holds the twelve amazon.co.uk listings from 19 October 2026, at £6.98 to £19.90. We did not run a tile test. A qualifying purchase can earn a commission at no extra cost to you.

You are cutting rectified bathroom tile, or a 20 mm outdoor porcelain slab, on a 115 mm angle grinder, and the edge people will see is the part that chips.

Our top picks

RDXMAX RDXMAX 115 mm turbo mesh, 2-pack

Best overall

RDXMAX RDXMAX 115 mm turbo mesh, 2-pack
8.6/10about £15.99
View offer
EZARC EZARC 115 mm mesh turbo, 2-pack

Rank 2

EZARC EZARC 115 mm mesh turbo, 2-pack
8.4/10about £17.97
View offer
Anesty Anesty 115 mm mesh turbo, 3-pack

Rank 3

Anesty Anesty 115 mm mesh turbo, 3-pack
7.7/10about £18.90
View offer
On this page
  1. 1.Why porcelain chips on a grinder
  2. 2.Rim types that belong on porcelain
  3. 3.Feed, support and the line you mark
  4. 4.Dust, water, and when a wet saw takes over
  5. 5.Listings UK reviewers used on porcelain

Why porcelain chips on a grinder

Porcelain is denser than ordinary glazed ceramic, and a rectified edge has almost no spare to hide a nick. If you push a 115 mm disc, the glaze breaks ahead of the kerf and the chip sits on the face you cannot grout over. A 20 mm slab takes longer in the cut, so a heavy feed heats the rim and the tile together. ATS Diamond Tools maps a continuous or turbo rim to glazed tile. A segmented rim clears heat in masonry, and the gaps in that rim are where a glazed edge gets battered.

Rim types that belong on porcelain

A thin turbo or mesh-turbo is the porcelain compromise: a near-continuous edge, with a path for dust. EZARC, RDXMAX and Anesty are in that group, all 115 mm, at about 1.2 mm. RDXMAX is listed at 1.4 mm in the title and 1.2 mm in an item field. The review that describes the disc spinning in the flanges is the clamp limit, not a reason to pack the bore. Bosch (B004O4KUKS) at £6.98 is the ceramic disc, and the listing does not state a mesh rim, so do not promote it to a 20 mm porcelain blade. Tech Traders and worksky belong on brick and paving. WojBear’s 1 mm kerf has no UK review line. That is a width claim, not a porcelain strategy. Who each listing is for sits on the best diamond cutting disc page.
RDXMAX RDXMAX 115 mm turbo mesh, 2-pack

Testsieger

RDXMAX RDXMAX 115 mm turbo mesh, 2-pack
8.6/10about £15.99
View offer

Feed, support and the line you mark

Mark the cut on the face you can afford to lose a millimetre from, and support both sides so the offcut cannot drop and pinch the disc. Take a shallow first pass on 20 mm porcelain, then further passes. If the grinder note drops and you are leaning, you are feeding too fast. The guard stays on. A 115 mm guard does not take the 180 mm DT-DIATOOL disc. EZARC states 13,300 rpm. Do not borrow LEKOMESH’s printed maximum of 19,000 rpm as a target.

Dust, water, and when a wet saw takes over

Dry grinding of porcelain still makes silica dust. The UK workplace exposure limit for respirable crystalline silica is 0.1 mg/m³ over eight hours. HSE’s CIS36 sheet, written for concrete and paving, asks for water or extraction and respiratory protection at an assigned protection factor of 20 where the task needs it. Do not soak a mains grinder that is not rated for water. A wet tile saw is the better tool for a long visible mitre. The grinder remains useful for a notch or a short cut against a wall.

Listings UK reviewers used on porcelain

Pick EZARC at £17.97 or RDXMAX at £15.99 for a 20 mm slab, and Anesty at £18.90 when you want three spare mesh discs. Use Bosch when the tile is ordinary ceramic. Skip RTDHO at £14.99, 2.4 from eight reviews. Skip a segmented pack on this edge, WojBear with no review line, and Vearter’s 76 mm mandrel. LEKOMESH’s 4.4 from 133 has no UK review text. A wet saw remains the finish for a show mitre.

Common questions

Should I buy a turbo mesh or the Bosch ceramic disc for bathroom porcelain?
For porcelain, start with a mesh turbo such as EZARC, RDXMAX or Anesty. Bosch at £6.98 is the strong ceramic buy, with 4.6 from 5,979 reviews, and the listing does not state a mesh rim. Ordinary ceramic can sit on Bosch. A rectified porcelain floor should not, unless you can accept a chip.
Will a segmented disc chip the glaze?
It is likely to, compared with a continuous or mesh rim on the same tile. Segmented discs in this set, Tech Traders and worksky, are the masonry packs, and UK review notes include chips when that rim is used on glaze. Keep the segmented pack for paving and cills.
How slow should I go on 20 mm outdoor porcelain?
Use more than one pass. A shallow first cut, then deeper passes, keeps you from forcing the full 20 mm in one shove. Support the slab so the offcut cannot pinch the disc. Stay at or under the marked speed. EZARC states 13,300 rpm. A long visible edge is a wet-saw job if you have not cut that thickness before.
Can I get chip-free cuts on large-format tiles?
Not as a guarantee from these listings. Large-format porcelain shows every nick, and even well-reviewed mesh turbos have chip reports. A thin turbo, a slow feed and proper support improve the odds. A show edge for the whole run is a wet-saw job. This comparison did not lab-test a chip-free claim.
When should I use a wet tile saw instead of the grinder?
Use the saw for a long mitre, for a run of show edges, and when you have not cut large-format or 20 mm porcelain before. Use the grinder for a notch or a short cut against a wall. Do not soak an unrated mains grinder to imitate the saw.
Does a dry porcelain cut still need a mask?
Yes, if dust is in the air you are breathing. Porcelain cutting produces crystalline silica, and the UK eight-hour limit is 0.1 mg/m³. CIS36 asks for water or extraction and RPE at APF 20 where the task needs it. A comfort mask with no APF mark is not that control.

Related pages

How to use a diamond cutting disc

Diamond cutting disc

Best diamond cutting disc: ceramic, porcelain, paving

Diamond cutting disc buying guide: rim, bore, speed

Turbo or segmented diamond blade: which rim to use

Sources

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

  1. HSE — PUWER overview (retrieved 19.10.2026)
  2. HSE — HSG17 abrasive wheels (retrieved 19.10.2026)
  3. HSE — silicosis and RCS (retrieved 19.10.2026)
  4. HSE CIS36 — cutting concrete and paving (retrieved 19.10.2026)
  5. HSE ST3 — hand-held rotary cutting of stone (retrieved 19.10.2026)
  6. BSI — BS EN 13236:2019 (retrieved 19.10.2026)
  7. Toolstation — EN 13236 speed sheet (retrieved 19.10.2026)
  8. ATS Diamond Tools — rim types (retrieved 19.10.2026)