The best grinding discs, compared.
Top pick: Merryland 125 mm grinding wheels (10) Best value: Hilka Turbo Flex grinding discs (5) – £10.02 for five 115 x 6 mm discs, 4.6 from 844 reviews. Grit 180, and no rpm or bore on the listing, stay in the score. Updated October 2026.
A grinding disc on a UK angle grinder is usually a thick resin-bonded wheel, shape 27, used on its face at a shallow angle to dress welds and remove metal. They are not 1 mm cutting discs, flap discs or diamond consumables. You tell them apart from a bad amazon.co.uk hit by thickness near 6 mm, a 22.23 mm bore where the listing prints one, a grit or grade code, a printed maximum rpm where the maker gives one, and whether the reviews describe face grinding rather than edge cutting. This set spans 115 mm and 125 mm because the listings mixed sizes. Match the disc to your guard, not only the bore. A 4.6 star row is not a grinding result when the texts describe cutting. Diameter, bore, grit and speed are set out in the [grinding discs buying guide](/hub/sanders/grinding-discs/sub/grinding-discs-buying-guide).
A grinding disc on a UK angle grinder is usually a thick resin-bonded wheel, shape 27, used on its face at a shallow angle to dress welds and remove metal.
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Personal buying guide
Question 1 of 2
Which guard are you fitting?
The Merryland E31086043 pack is ten 125 x 6.0 x 22.23 mm wheels at £17.90, rated 4.6 from 1,074 amazon.co.uk reviews, with bullets that claim 12,250 rpm, EN 12413 and a safety manual. The material line says A30R-BF while the grit field says 60, and the thickness table says 0.25 inches against a 6.0 mm bullet. Reviews often describe cutting rod, bodywork or a thin disc, and one UK buyer who found the parcel over a gate inspected every disc for cracks and called them cutting discs. A review from Spain says the discs sit about 2 mm oversize and will not fit a 125 mm guard unless the guard comes off or the disc is trimmed, which is not a fit you should force. Another report says discs break at the slightest use. The 175 g item weight is not a credible figure for ten 6 mm wheels. It is the only 125 mm pack in this set, so it is the listing you open when the guard is 125 mm, but the review file does not confirm face grinding and the higher box price does not buy a cleaner specification than the 115 mm Merryland.
Pros
Cons
Best for: You already own a 125 mm grinder and will check thickness and the guard fit on arrival before you trust the star row.
Less suitable: You want review texts that describe weld dressing, or you only have a 115 mm guard.
Specifications
Common questions
Can I use this disc on a 115 mm grinder?
No. The listing is for 125 mm grinders. A matching 22.23 mm bore does not make an oversize disc safe if the guard is too small. Do not remove the guard to make it fit.
What speed is printed?
The bullets say a maximum of 12,250 rpm and cite EN 12413. That figure has to be at least the grinder's rated speed. It is the listing claim, not a tachometer reading.
How does this relate to the 125 mm grinding discs comparison?
It is the same Merryland ASIN also kept on the size-specific 125 mm comparison, with four other 125 mm packs. This page is the mixed 115 mm and 125 mm set. Open the size page when you already know the guard is 125 mm.
The Merryland E31076043 ten-pack is a 115 x 6.0 x 22.23 mm depressed-centre wheel, shape T27, listed at £15.90 on amazon.co.uk and rated 4.6 from 1,006 reviews. The bullets claim 13,300 rpm, EN 12413, three fibreglass layers and a safety manual in the box, while the material line prints A30R-BF and the grit field says 46. UK reviewers describe cheap discs that work through unwanted metal and keep an edge on a small grinding job, which is the use a 6.0 mm face is meant for. The same star row also contains cutting-disc wording, one note that a first disc broke into pieces, and a review that describes 115 x 3 mm discs rather than the 6.0 mm line. The item-weight field of 140 g cannot be a ten-pack of 6 mm wheels, and the Best Sellers Rank sits under Cut-Off Wheels. In this three-pack set it is the top pick for a 115 mm grinder because bore, thickness and rpm are all printed, though you still read the ring for the use-by date and you do not treat the 4.6 as proof that every buyer received a grinding wheel.
Pros
Cons
Best for: You run a 115 mm angle grinder and want a ten-pack that prints bore, 6.0 mm and 13,300 rpm before you mount it.
Less suitable: You need a 125 mm guard, a single grit figure with no clash, or reviews that only describe face grinding.
Specifications
Common questions
Which grinder size is this Merryland pack for?
The listing says 115 mm (4.5 inch) angle grinders with a 22.23 mm bore and up to 13,300 rpm. A 125 mm guard needs the 125 mm pack, not this one.
Does the page say stainless steel?
Yes. The title and bullets name stainless steel and INOX among other materials. That is a listing claim. Do not treat the title as an iron-free stainless specification.
Why is the amazon rank under cut-off wheels?
The Best Sellers Rank category on the listing is Cut-Off Wheels even though the bullets describe a 6.0 mm grinding wheel. Read the thickness and the reviews. The rank is not proof this box is a cutting disc.
The Hilka TFGR11505 is a five-pack of 115 x 6 mm depressed-centre Turbo Flex discs at £10.02, rated 4.6 from 844 amazon.co.uk reviews. The listing states grit 180 aluminium oxide, calls that grit medium, and shows an EN 12413 identifier, while bore and maximum rpm are not printed on the listing. UK reviews praise the price and say the discs grind well or last a long time, including one account of cutting through steel drums, so the star row mixes face grinding with edge cutting. Grit 180 is finer than the 24–36 band usually used for heavy weld dressing, so a weld bead will take longer than it would on a coarse A30 wheel. The item-dimensions line also prints 0.1 cm, which does not match the 6 mm description, and the rank sits under Cut-Off Wheels. It is the best value in this set when you want the smaller £10.02 box on a 115 mm grinder and you will read the disc ring for rpm and bore before the first spin, though it is a weak choice if the job is coarse stock removal.
Pros
Cons
Best for: You want a smaller spend on a 115 mm grinder for light metal finishing and you will check the ring for speed and bore.
Less suitable: You need a printed rpm, a 22.23 mm bore on the page, or a coarse wheel for weld dressing.
Specifications
Common questions
Is Hilka grit 180 coarse or fine?
Grit 180 is a finer grade than the 24–36 band often used for heavy stock removal on steel. The listing calls it medium. A weld bead will take longer than it would on a coarse A30 wheel.
Does the listing show maximum rpm?
No. The amazon.co.uk listing shows an EN 12413 identifier but not an rpm figure, and it does not print the bore. Read the disc ring before the first spin. Do not guess a speed from another brand.
How many discs are in the box?
Five TFGR11505 115 mm Turbo Flex grinding discs, at £10.02 for the box, about £2.00 a disc. That is the smaller purchase in this set, not the lowest price per disc.
Three amazon.co.uk grinding-disc packs were scored for this page. Weights sum to 100. A printed rpm is the listing claim, not a tachometer reading. A star row is the amazon.co.uk figure, not a grinding trial. There was no lab test. Shelf prices are £10.02, £15.90 and £17.90.
Amazon evidence
25%Star rating and review count on amazon.co.uk, then a hard deduction when the written reviews describe cutting discs or thin wheels rather than a 6 mm grinding wheel.
Listing agreement
35%A depressed-centre size near 6 mm, a 22.23 mm bore, a grit field that matches the grade line, a maximum rpm and a named standard score higher. Clashing grit, thickness or weight fields, and a missing rpm or bore, lose points.
Review outcome
25%UK texts that describe face grinding or stock removal score higher than a file that talks about cut-off wheels, snapped discs, or a wheel that will not sit inside the guard.
Value
15%Shelf price in GBP. The lowest box price does not win this block on its own when grit or missing speed data means you cannot match the disc to the job from the page.
The checks run in this order: diameter and guard, bore, thickness, metal and grain, then speed and the use-by date. The table is three amazon.co.uk depressed-centre packs, two at 115 mm and one at 125 mm. Flap discs, cutting discs, diamond cup wheels and 50 mm roll-lock discs are other comparisons. No disc was timed. A 4.6 star row does not, on its own, tell you the wheel is 6 mm.
A grinding disc on a UK angle grinder is a thick resin-bonded wheel, usually shape 27, used on its face at a shallow angle to dress welds and remove metal. The three listings kept on this page are the Merryland 115 x 6.0 x 22.23 mm ten-pack at £15.90, the Hilka Turbo Flex 115 x 6 mm five-pack at £10.02, and the Merryland 125 x 6.0 x 22.23 mm ten-pack at £17.90.
Thickness near 6 mm and face use mark a grinding wheel. A 1–3 mm disc is for the edge. A flap disc is a different comparison.
All three packs are 4.6. The texts also describe cutting discs, thin wheels, snapped discs, and one guard that will not close. Read those notes with the thickness.
Merryland prints A30R-BF and also grit 46 or 60. Hilka does not print rpm or bore. Do not mount either until the ring matches the grinder.
Match the disc to the guard. 115 mm stays on a 115 mm grinder and 125 mm on a 125 mm grinder. If the wheel stands proud, do not take the guard off and do not trim the disc to force a fit. Hand-held wheels use a 22.23 mm bore. Both Merryland packs print it. Hilka does not, so the ring has to show it before you spin the disc. About 6 mm on the face is stock removal and weld dressing. Cutting discs are about 1–3 mm and work on the edge.
Coarse aluminium oxide around grit 24–36 is the usual steel stock-removal band. Merryland prints A30R-BF on both sizes, while the 115 mm grit field says 46 and the 125 mm field says 60. Hilka lists grit 180 and calls it medium, which is light finishing, not a coarse weld bead. The rpm on the disc must be at least the grinder's rated speed. Merryland prints 13,300 rpm at 115 mm and 12,250 rpm at 125 mm. Hilka names EN 12413 and does not print rpm. EN 12413 is the bonded-abrasive safety standard.
Three typical situations, each with a recommendation from this comparison.
You run a 115 mm angle grinder and want bore, 6.0 mm and rpm on the page before you mount a disc. The Merryland ten-pack is the top pick at £15.90, 4.6 from 1,006 reviews, with 13,300 rpm and EN 12413 claimed. The grit field says 46 against A30R-BF, and many reviews describe cutting.
You want a lower box price on a 115 mm grinder for light finishing, and you will read the ring for speed and bore. The Hilka five-pack is the best value at £10.02, 4.6 from 844 reviews. Grit 180 is finer than a coarse weld-dressing wheel, and the listing does not print rpm or bore.
You already own a 125 mm grinder. The only 125 mm pack here is the Merryland ten-pack at £17.90, with 12,250 rpm claimed and 4.6 from 1,074 reviews. Check thickness and the guard fit on arrival. Reviews often describe cutting, and one report says the disc is about 2 mm too large for the guard.
The top pick is the Merryland 115 mm ten-pack at £15.90, with 4.6 from 1,006 reviews. It prints 115 x 6.0 x 22.23 mm, 13,300 rpm and EN 12413. The best value is the Hilka five-pack at £10.02, about £2.00 a disc, on a 115 mm grinder. The 125 mm Merryland file is set aside for that award because its reviews describe cutting and one report says the disc will not fit a 125 mm guard. The Merryland 115 mm ten-pack is about £1.59 a disc, so the value award is the smaller single purchase, not the lowest price per disc. Missing rpm, missing bore and grit 180 stay in the Hilka score. A 4.6 from more than a thousand reviews is not scored as a grinding result when the texts describe cutting.
Hilka Turbo Flex grinding discs (5)
£10.02 for five 115 x 6 mm discs, 4.6 from 844 reviews. Grit 180, and no rpm or bore on the listing, stay in the score.
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.
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.
