Independent comparisons. We may earn from shop links. More info

Diamond cutting disc buying guide

Updated: 21 October 2026

You have a 115 mm angle grinder, a stack of tiles or a couple of paving slabs, and an amazon.co.uk grid that mixes mesh turbo discs, segmented masonry blades, an M14 screw-on wheel and a 76 mm mandrel set. A diamond cutting disc buying guide has to settle four checks before the brand: the material, the guard diameter, the bore or mount, and one maximum speed you will actually trust. The [diamond cutting disc comparison](/hub/sanders/diamond-cutting-disc) holds the twelve listings, priced from £6.98 to £19.90 on 19 October 2026. We did not run a lab test. A qualifying amazon.co.uk purchase can earn a commission at no extra cost to you.

You have a 115 mm angle grinder, a stack of tiles or a couple of paving slabs, and an amazon.co.uk grid that mixes mesh turbo discs, segmented masonry blades, an M14 screw-on wheel and a 76 mm mandrel set.

Our top picks

Bosch Bosch 115 mm ceramic cut, 1 disc

Best overall

Bosch Bosch 115 mm ceramic cut, 1 disc
9.3/10about £6.98
View offer
Tech Traders Tech Traders 115 mm segmented, 3-pack

Best value

Tech Traders Tech Traders 115 mm segmented, 3-pack
9.1/10about £9.79
View offer
EZARC EZARC 115 mm mesh turbo, 2-pack

Rank 3

EZARC EZARC 115 mm mesh turbo, 2-pack
8.4/10about £17.97
View offer
On this page
  1. 1.Match the job to the rim
  2. 2.Diameter and the guard
  3. 3.Bore, reducer and an M14 mount
  4. 4.Maximum speed and kerf
  5. 5.What £7 to £20 buys in this set

Match the job to the rim

Porcelain and glazed ceramic want a thin turbo or mesh rim. EZARC, RDXMAX and Anesty sit in that group, and the Bosch ceramic disc is the single-disc option when the tile is ceramic rather than a thick porcelain slab. Brick, block, paving and concrete want a segmented rim, the Tech Traders and worksky packs. A disc that clears heat on concrete will nick a glazed edge. SANLEETEK is electroplated on both sides at grit 40/50 and screws onto an M14 thread. RTDHO’s eight UK reviews, at 2.4, say the diamond layer vanished quickly. Rim against rim is on the turbo or segmented diamond blade page.

Diameter and the guard

A 115 mm guard takes a 115 mm disc. DT-DIATOOL is 180 mm at £19.90 and will not fit a 115 mm guard. Vearter is 76 mm on an M14 mandrel, five discs at £14.99, with an item thickness of 9.5 mm and no review line. If the plate says 115 mm, stop at those two rows before you compare stars. Taking the guard off to fit a larger disc is not a workaround. HSE’s HSG17 sits with PUWER 1998 at work: the wheel, the speed and the guard have to suit the machine.
Bosch Bosch 115 mm ceramic cut, 1 disc

Testsieger

Bosch Bosch 115 mm ceramic cut, 1 disc
9.3/10about £6.98
View offer

Bore, reducer and an M14 mount

The usual bore is 22.23 mm. Tech Traders prints 22.2 mm. DT-DIATOOL supplies a 22.23–16 mm washer, and you take it out if the arbor is already 22.23 mm. Do not leave a reducer in on a 22.23 mm arbor, and do not pack the bore. SANLEETEK does not use that bore. It is an M14 thread at £16.99, recommended 8,000 rpm and 13,200 rpm maximum, and a flange grinder will not mount it. LEKOMESH mentions an M14 machine and also states 22.23 mm and 15.875 mm. Read the mount line on the disc you unpack.

Maximum speed and kerf

Use the lower of the mark on the disc and the speed on the grinder plate. EZARC states 13,300 rpm, Tech Traders 13,000 rpm and SANLEETEK 13,200 rpm. A Toolstation sheet labelled against EN 13236 lists about 13,200 rpm for a 115 mm wheel at 80 m/s. None of the twelve listings print a full BS EN 13236 mark. LEKOMESH states 19,000 rpm maximum and a recommended 11,000 rpm. Do not aim at 19,000 on a 115 mm grinder. Kerf runs from 1 mm on WojBear to 2.5 mm on SANLEETEK. If an RDXMAX disc spins in the flanges, stop.

What £7 to £20 buys in this set

About £7–£12 covers Bosch at £6.98, Tech Traders at £9.79, worksky at £9.99, WojBear at £11.99 with no reviews, and LEKOMESH at £12.99 with no UK review text. About £13–£20 covers RTDHO at £14.99, 2.4 from eight reviews, Vearter at £14.99, RDXMAX at £15.99, SANLEETEK at £16.99, EZARC at £17.97, Anesty at £18.90 and DT-DIATOOL at £19.90. RTDHO’s UK reviews say the coating went after a short length, about six inches in one report. Bosch, at 4.6 from 5,979 reviews, is the top pick for ceramic. Tech Traders is the best value for masonry. Visible porcelain edges are on the diamond cutting disc for porcelain page.

Common questions

What diameter matches my 115 mm guard?
A 115 mm guard matches a 115 mm disc. In this set that is the Bosch, EZARC, Tech Traders, worksky, RDXMAX, Anesty, SANLEETEK, LEKOMESH, WojBear and RTDHO listings. DT-DIATOOL is 180 mm and will not fit that guard. Vearter is a 76 mm mandrel wheel. Do not remove the guard to force a larger disc on.
Is 22.23 mm the usual bore on a UK angle grinder?
Yes for a bored disc in this comparison. Most of the 115 mm listings state 22.23 mm, and Tech Traders prints 22.2 mm. A 16 mm reducer is only for a smaller arbor. SANLEETEK and the Vearter mandrel use an M14 thread and do not clamp in those flanges.
Should my first disc be turbo or segmented?
Match the edge you need to keep. A turbo or mesh rim is the starting point for porcelain and glazed ceramic. A segmented rim is the starting point for brick, block, paving and concrete. If you only buy one and the first job is a visible tile edge, do not start with the masonry pack.
Can I leave a 16 mm reducer in the bore?
Only if the arbor is actually 16 mm. On a 22.23 mm spindle it holds the disc off-centre. DT-DIATOOL’s 22.23–16 mm washer comes out for that arbor. Do not pack the hole. If it still spins, the disc is the wrong fit.
Which maximum rpm should I trust on the listing?
Trust the lower of the disc mark and the grinder plate. EZARC states 13,300 rpm, Tech Traders 13,000 rpm and SANLEETEK 13,200 rpm, close to the 115 mm class figure on a sheet labelled against EN 13236. On LEKOMESH use the recommended 11,000 rpm, not 19,000.
Do these listings prove a BS EN 13236 mark?
No. BS EN 13236:2019 is the British Standard for superabrasive products, including non-precision diamond cutting-off wheels. None of these twelve listings print a full EN 13236 mark, so the comparison cannot award one. A speed sheet that mentions the standard is not the same as a mark on the disc you unpack.

Related pages

How to use a diamond cutting disc

Diamond cutting disc

Best diamond cutting disc: ceramic, porcelain, paving

Diamond cutting disc for porcelain: chips on the edge

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)