The best diamond cup wheels, compared.
Top pick: Yikuneng 115 mm double row Best value: BRSCHNITT 115 mm double row – £15.99, 4.6 from 129. One maximum of 13,200 rpm and a 22.23 mm bore, at a lower shelf price than the top pick. Smaller review file than the turbo, and one reviewer removed the guard. Updated October 2026.
A diamond cup wheel is a steel cup with a diamond face that you run on an angle grinder to grind concrete, masonry or stone flat. Almost every cup is a coarse grit around 40 to 50. HSE expects or extraction and a mask at 20, and the guard stays on. They do not claim a tested winner, and none of these wheels was checked for a BS EN 13236 mark. How to match diameter, bore and pattern is on the [diamond cup wheel buying guide](/hub/sanders/diamond-cup-wheel/sub/diamond-cup-wheel-buying-guide).
A diamond cup wheel is a steel cup with a diamond face that you run on an angle grinder to grind concrete, masonry or stone flat. Almost every cup is a coarse grit around 40 to 50.
38 products checked · 64 hrs invested · +22,600 readers
Swipe for more
1-2 of 11
Personal buying guide
Question 1 of 2
Which grinder are you fitting?
The Yikuneng YIK00009 is a 115 mm double-row cup at £13.99, with grit 40, a stated 22.23 mm bore, 5 mm working thickness and eight cooling holes. Amazon.co.uk shows 5.0 from two reviews, and the one written review says it levels an uneven surface, grinds hard material, and throws chips and dust so the guard has to stay on. The specification field says 13,200 rpm, while the bullets say a recommended 9,000 rpm and a maximum of 15,000 rpm. The grit-type field says Super Fine beside grit 40. The bullets say dry or wet, which still depends on whether the grinder is built for water. At 350 g the cup is light on paper. Two ratings are not a test, and the speed lines do not give you one figure to set against the grinder. Skip it until a larger review file exists and the wheel in your hand shows one maximum.
Pros
Cons
Best for: A later look, once the wheel in the box shows one maximum speed and more than two ratings exist.
Less suitable: A buyer treating 5.0 from two reviews as a test result.
Specifications
Common questions
Is it suitable for wet grinding?
The bullets say dry or wet. Follow the grinder manual before using water.
Which maximum speed is listed?
The specification field says 13,200 rpm. The bullets say recommended 9,000 and maximum 15,000. They do not agree.
How many reviews support the 5.0 score?
Two. The one written review mentions dust, chips and keeping a guard on.
The worksky WKS-ML-EU-125 is a 125 mm cup at £18.99 with a stated maximum of 13,200 rpm. Bore, grit and segment pattern are not stated, and the part-number field prints WKS-ML-EU-115. Amazon.co.uk shows 4.7 from nine reviews, and all nine are in the stored review notes. Several reviewers call it faster on uneven concrete than a normal abrasive disc, and the jobs named include a floor before underfloor heating and a shed base. One reviewer wore the wheel out before half the job. That review recalls an order price of £50, while the raw shelf price used here is £18.99. The catalogue rank sits under Diamond Blades rather than cup wheels. At 400 g, and with no bore on the listing, it is a 125 mm cup you check in the box before it goes on a spindle.
Pros
Cons
Best for: A 125 mm grinder, after you have confirmed the bore on the cup you received.
Less suitable: A 115 mm spindle, or a buyer who needs grit and bore on the listing before ordering.
Specifications
Common questions
What speed does the listing give?
Maximum rotational speed 13,200 rpm. No separate recommended speed is given.
Does it state a bore?
No. Diameter is 125 mm. The part-number field says WKS-ML-EU-115.
Do the nine reviews agree on life?
Several praise fast concrete removal. One says the wheel was finished before half the job.
The QWORK WD6396-N is a 125 mm cup at £7.98, the lowest shelf price in the set, with grit 40 and a 5 mm segment height in the bullets. Amazon.co.uk shows 4.6 from 446 reviews. Buyers describe a lump in an old concrete floor that hand methods had not shifted, plaster and small concrete areas, old mortar on a foundation, and tile adhesive on porcelain tiles. One small area showed little wear, while other reviewers say it does not last as long as dearer discs and were dubious about how much diamond was visible. The bullets say a 22.23 mm bore, and one review needed a washer because the cup centre was small for the collar. Maximum rpm is not stated. The thickness field prints 22.2 mm, which matches the bore rather than a disc thickness. It is the cup to look at when the grinder is 125 mm and the job is a lump or a patch of adhesive, not when you need a printed speed.
Pros
Cons
Best for: A 125 mm grinder and a concrete lump, a plaster patch or tile adhesive.
Less suitable: A 115 mm guard, or a job where you need a maximum speed printed before you buy.
Specifications
Common questions
Will it grind plaster?
The listing names plaster, and a review describes smoothing plaster and small concrete areas.
What is the bore?
The bullets say 22.23 mm. The title also prints 22.2 mm. One review needed a washer because the cup centre was small.
Is a maximum speed listed?
No.
The BRSCHNITT BGS01115103R is a 115 mm double-row cup at £15.99, with 5 mm segments, grit 40/50, a 22.23 mm bore and a single maximum of 13,200 rpm. Amazon.co.uk shows 4.6 from 129 reviews. Reviewers describe painted brick steps under light pressure, a chimney breast, mortar stripped from old bricks, and work on a concrete floor and a brick wall. One calls the finish smooth and the cup well balanced at 420 g. A reviewer removed the guard to get the face flat, which the listing does not instruct, and another found the cup difficult to fit. The grit-type field says Fine beside grit 40, and 40 is a coarse number. Whole-floor use came up once, and that reviewer would not recommend it. It is the best value here when you want a stated bore and one speed line on a 115 mm grinder, at a lower shelf price than the SHDIATOOL, with a smaller review file than the turbo from the same brand.
Pros
Cons
Best for: Brick steps, mortar and a modest concrete area on a 115 mm grinder.
Less suitable: A whole-slab level, or a buyer who wants the 446-review turbo file before they choose.
Specifications
Common questions
Is this the turbo or the double row?
The listing calls it a double-row cup, 115 mm, bore 22.23 mm, segment height 5 mm.
What maximum speed is listed?
13,200 rpm.
What fit issue appears in reviews?
One reviewer removed the guard to grind flat, and one found it difficult to fit. The listing itself does not say to remove the guard.
The WORKPRO W124887AE is a 115 mm double-row cup at £14.99, with 18 segments at 5 mm, grit 40/50, a 22.23 mm bore, eight cooling holes and a maximum of 13,300 rpm. The bullets say wet or dry, and amazon.co.uk shows 4.6 from 30 reviews, with three texts in the stored review notes. They mention raised garden concrete, a floor that still looked sharp after about 15 minutes, and a fit the reviewer was happy with. One reviewer says the cup needs patience and will wear out too soon if you rush the pass. At 350 g it is lighter than the SHDIATOOL and the BRSCHNITT turbo. The specification lines agree with each other, which several cups in this set do not. Thirty ratings and two substantive comments are still a thin basis for how long the diamonds last. It suits a 115 mm grinder and a garden concrete patch if you can accept that small sample.
Pros
Cons
Best for: A 115 mm grinder and a garden concrete patch, when you want the spec lines to agree.
Less suitable: A buyer who wants hundreds of reviews before trusting a wear claim.
Specifications
Common questions
How many segments does the listing claim?
18 double-row diamond segments, 5 mm high, grit 40/50.
What speed is listed?
Up to 13,300 rpm.
How much review text is in the file?
Three texts against a count of 30. They mention garden concrete, patience and wear.
The BRSCHNITT BGS02115103R is a 115 mm turbo-row cup at £16.99. The listing states a 22.23 mm bore, grit 40/50 and a maximum of 13,200 rpm, and the bullets put the segment height at 5 mm. Across 446 reviews at 4.5, the largest count in this set, buyers report fast removal of concrete high spots, tile adhesive, a doorway ridge inside a dust shroud, and path levelling. A garage-floor review says the cup wears down fast, and one buyer used five discs on a 25 m² floor with a large level difference. At 450 g it is described as a little heavy, and it can take off too much concrete if you linger on one spot. At least one reviewer removed the shield because it caught. The thickness field prints 4.5 inches, which is not a segment height, and the grit field also shows 45. Use it for a lip on a 115 mm grinder when you want that review volume, and expect several cups if the floor is badly out of level.
Pros
Cons
Best for: A concrete high spot, adhesive or a doorway ridge on a 115 mm grinder, when review volume matters.
Less suitable: Levelling a whole uneven slab with one cup, or anyone who needs the listing fields to agree.
Specifications
Common questions
How does the listing describe the rim?
Turbo row, with a claim of fast removal and less chatter. That claim is not a lab result.
Can it be used on marble?
The listing names marble, granite, concrete and masonry.
What wear comment is in the reviews?
One garage-floor review says it wears down fast, and one buyer used five discs on a large uneven floor.
The Bujingyun 2-pack, model LIU88, is two 100 mm 12-segment cups at £8.88, listed at grit 60, with the same 4.5 from 264 rating line as the 3-pack. Reviewers use them for concrete, mortar and stone, and one disc from a multi-pack was enough for a small kerb with little wear. A graffiti-removal review on brick reports smooth running, and the same file says the face of the brick can scratch. The bore complaint matches the 3-pack: about 20 mm against a 22 mm claim, and a nut that will not clamp. No maximum speed is stated, and the pack is listed at 390 g. Dry or wet use is claimed on the listing. The shared review pool means you are not buying a separately tested wheel. Take it for a 100 mm grinder and a small masonry job only after the hole in the box matches the spindle.
Pros
Cons
Best for: A 100 mm grinder and one small kerb or mortar job, once you have checked the bore.
Less suitable: A 22.23 mm spindle, or a buyer counting 264 reviews as proof of this pack alone.
Specifications
Common questions
How is this different from the 3-pack?
The listing is two cups at £8.88, model LIU88, against three cups at £12.88. Diameter, grit and the rating line match.
What bore problem do reviews mention?
A hole nearer 20 mm than 22 mm, and a retaining nut that does not seat.
Is a maximum speed stated?
No.
The Bujingyun 3-pack, model LIU89, is three 100 mm 12-segment cups at £12.88, listed at grit 60, with a stated bore of 22 mm and no maximum rpm in the raw file. The 4.5 from 264 reviews is the same line as the 2-pack, so it is not a second sample. Reviewers grind concrete steps, pointing and sandstone sills, and one light pin-kerb job showed little wear on a single disc. The repeated fault is the hole: nearer 20 mm than 22 mm, with a retainer nut that does not clamp and an adaptor needed. The included-components field says drill bits, which is not what the title sells. Dust is heavy, and the face of a brick can scratch if you grind the face rather than the joint. The pack weight is 520 g. It is a 100 mm multi-pack for a grinder of that diameter, and a poor fit if your spindle is 22.23 mm.
Pros
Cons
Best for: A 100 mm grinder and a small step or pointing job, if the hole in the box matches the spindle.
Less suitable: A 115 mm grinder with a 22.23 mm spindle, or anyone treating the star line as a separate test of this pack.
Specifications
Common questions
Will this fit a 115 mm grinder?
The listing diameter is 100 mm (4 inch), not 115 mm. The listed bore is 22 mm, and reviews report about 20 mm.
Is the 264-review score unique to this pack?
The same 4.5 from 264 line appears on the 2-pack ASIN. Treat it as one shared pool.
Does the listing name a maximum speed?
No. Maximum rpm is not in the raw file.
The HIGHDRIL HG100045103 is a 115 mm turbo cup at £16.99, with grit 40/50, a stated 22.23 mm bore and 5 mm segments. The bullets say dry or wet grinding. Amazon.co.uk shows 4.5 from 91 reviews, and the stored review notes hold six written texts. Those texts call it easy to use and good value over a few weeks, and one says the diamond segments are very small and only all right for a small job. The specification field says 8,000 rpm while the bullets also print 13,200 rpm, so the speed line does not agree until you read the wheel in the box. One review title mentions 125 mm, and the listing diameter is 115 mm. Wet use is a claim on the page, and the grinder manual still decides whether water is allowed. Leave it until you can read one maximum on the steel, because the listing does not give you a single figure to trust.
Pros
Cons
Best for: A small 115 mm job, after you have read the speed mark on the wheel itself.
Less suitable: Anyone who needs the listing to state one maximum rpm before the cup arrives.
Specifications
Common questions
Does the listing allow water?
The bullets say dry or wet grinding. The grinder manual still decides whether water is allowed.
What speed should you trust?
The specification field says 8,000 rpm and the bullets also print 13,200 rpm. Read the wheel in the box before use.
How many written reviews are in the file?
Six texts against a 91-rating count. One says the segments are small and suited to a small job.
The SHDIATOOL A521014522 is a 115 mm turbo-row cup at £18.99, with a stated 22.23 mm bore, grit 40/50 and a maximum of 13,200 rpm. Across 426 amazon.co.uk reviews at 4.4, buyers use it on concrete thresholds, bricks, mortar and floor high spots, and one disc skimmed a large sand-and-cement screed and still showed diamond. The same file includes a granite worktop and tile adhesive lifted from reclaimed tiles. At 470 g it changes the balance of a small grinder, and reviewers suggest fitting the side handle. The flat face is awkward on angled high spots, and a cup about 22 mm high did not meet one third-party dust shroud until that shroud was modified. The bullets also print a recommended 8,000 rpm beside the 13,200 maximum, and one reviewer got no bite on render and sent it back. In this set it is the top pick for a 115 mm grinder and a local concrete lip, because the review file is large and the bore and maximum speed are stated.
Pros
Cons
Best for: A 115 mm angle grinder and a concrete threshold, mortar line or local high spot, when you want the large written review file.
Less suitable: A whole slab, a render-only wall, or a dust shroud that needs a taller cup.
Specifications
Common questions
What size is this cup?
The listing states 115 mm diameter, a 22.23 mm bore and grit 40/50, with a maximum speed of 13,200 rpm.
Which materials does the listing name?
Concrete, granite, marble and masonry. Wet or dry use is not stated.
What do the reviews repeat?
Concrete high spots and masonry come up often. Weight, dust and one no-bite return are the repeated complaints.
The KURSTOL K3101045103 is a 115 mm turbo-row cup at £16.99, with a 22.23 mm bore, grit 40/50, a 3.5 mm steel core and a maximum of 13,200 rpm. Amazon.co.uk shows 4.4 from 65 reviews, and the stored review notes hold three texts. The longer one ground about 2.5 mm off concrete edging blocks for a driveway drain. Segment depth is stated as 5 mm on the turbo and also as 6 mm workable, so that line is not a single figure. The recommended-uses field says sharpening, which does not match the concrete, stone and brick bullets. An on-page question about epoxy is unanswered in those bullets, and wet or dry use is not stated. The cup weighs 470 g. The bore and the maximum speed are clear, and the written evidence for how it cuts is two comments against a count of 65.
Pros
Cons
Best for: Concrete edging on a 115 mm grinder, if a short review file is enough.
Less suitable: Epoxy removal, or a buyer who needs wet-or-dry stated on the listing.
Specifications
Common questions
Does the listing say it removes epoxy?
The question is on the page. The bullets do not answer it. Materials named are concrete, stone and brick.
Does it need water?
The listing asks the question and does not answer it. Wet or dry use is not stated.
What did the longer review use it for?
Grinding about 2.5 mm off concrete edging blocks. Only two written reviews are in the file.
Eleven amazon.co.uk diamond cup wheels were scored for this page. Weights sum to 100. No wheel was run in a lab, and no square-metre life is claimed. A BS EN 13236 mark was not verified on any cup. Review themes come from the stored review notes. Shelf prices run from £7.98 to £18.99.
Amazon evidence
30%Star rating on amazon.co.uk, then the review count. A count under 10, under 50, or under 100 is deducted. The two Bujingyun ASINs share one 4.5 from 264 line, so that pool is deducted on both.
Listing fit
35%Diameter, a stated 22.23 mm bore, one maximum rpm, and a grit number. A missing rpm, a missing bore, or two speeds that contradict each other are deducted. A Fine or Super Fine label beside grit 40 is deducted.
Review outcome
20%Themes that name a concrete, masonry or adhesive job, and the complaints that repeat: wear, fit, guard and dust. A file of two or three texts cannot score like a file of twenty.
Value
15%Shelf price in GBP after the diameter and the bore are usable. A low price does not score when the bore is disputed or the maximum speed is missing.
The checks run in this order: diameter, bore, maximum rpm, segment pattern, then grit number. The table is eleven amazon.co.uk cups. A dust shroud is a different product. No cup was timed, and no square-metre life is claimed. A star rating does not, on its own, prove the bore or the speed.
A diamond cup wheel is a steel cup with a diamond face that you run on an angle grinder to grind concrete, masonry or stone flat. UK shoppers on amazon.co.uk in this set pay about £8 to £19 for a 100 mm, 115 mm or 125 mm cup, and almost all of them are a coarse grit around 40 to 50.
A cup grinds on its face. A cutting disc is a different wheel. None of the kept ASINs is a cutting disc. The worksky catalogue rank sits under Diamond Blades even though the title is a cup.
A Fine or Super Fine label beside grit 40 does not make the cup fine. Number 40 or 40/50 is coarse stock removal. Trust the number.
Reviews that describe taking the guard off so the cup sits flat are describing a mistake. Keep the guard on. A household vacuum is not M-class or H-class extraction for concrete dust.
Diameter must match the grinder. This set is 100 mm on the Bujingyun packs, 115 mm on most named cups, and 125 mm on the QWORK and the worksky. A 4 inch cup will not sit correctly behind a 115 mm guard. The bore is the next check. Hand-held grinders in the EN 13236 marking note use 22.23 mm. Bujingyun lists 22 mm, and reviews report a hole nearer 20 mm or a nut that will not clamp. QWORK states 22.23 mm in the bullets, and one reviewer needed a washer.
A turbo row is sold as a smoother rim. The SHDIATOOL, the BRSCHNITT turbo, the HIGHDRIL and the KURSTOL are in that group. A double row is sold as aggressive preparation. The BRSCHNITT double-row cup, the WORKPRO with 18 segments and the Yikuneng are in that group. The Bujingyun cups are 12-segment 100 mm turbos. None of these ASINs is a cutting disc. Grit 40 or 40/50 is the coarse number for stock removal. A Fine or Super Fine label beside 40 does not make the cup fine.
Three typical situations, each with a recommendation from this comparison.
You have a 115 mm grinder and a threshold, mortar line or floor high spot, and you want the long review file. The SHDIATOOL turbo is the top pick at £18.99, with 4.4 from 426 reviews, a stated 22.23 mm bore and a 13,200 rpm maximum. At 470 g it shifts the balance of a small grinder.
You want a stated bore and one speed line on a 115 mm grinder, at a lower shelf price. The BRSCHNITT double row is the best value at £15.99, with 4.6 from 129 reviews, 5 mm segments and a 13,200 rpm maximum. The review file is smaller, and one reviewer removed the guard.
Your grinder is 125 mm and the job is a concrete lump, plaster or tile adhesive. The QWORK cup is £7.98, with 4.6 from 446 reviews and grit 40. Maximum rpm is not stated, and one collar needed a washer. It is the wrong cup for a 115 mm guard.
The top pick is the SHDIATOOL 115 mm turbo row, at £18.99, with 4.4 from 426 reviews, a stated 22.23 mm bore and a maximum of 13,200 rpm. Reviewers use it on concrete thresholds and a screed skim. Deductions are the 470 g balance, a shroud clash, and a recommended 8,000 rpm beside the maximum. The best value is the BRSCHNITT 115 mm double row at £15.99, with 4.6 from 129 reviews, one maximum of 13,200 rpm and a 22.23 mm bore. The review file is smaller than the turbo from the same brand, and one reviewer removed the guard. A 5.0 from two ratings does not outrank a 4.4 from 426.
BRSCHNITT 115 mm double row
£15.99, 4.6 from 129. One maximum of 13,200 rpm and a 22.23 mm bore, at a lower shelf price than the top pick. Smaller review file than the turbo, and one reviewer removed the guard.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Sources taken from the research digest. Prices, stars and review counts are the stored amazon.co.uk listing figures for 19 October 2026.
This article contains affiliate links. If you buy through these links we may earn a small commission, at no extra cost to you. Prices, stars and review counts come from stored amazon.co.uk listings. We did not run a lab test.
