The best Bosch angle grinders 125, compared.
Top pick: Bosch Professional GWS 12-125 (110 V) Best value: Bosch Professional GWS 18V-8 – Body-only at about £89.44 for owners of blue 18 V packs, 4.7 from 531 reviews, with the disc size still to confirm on the guard. Updated October 2026.
A 125 mm angle grinder is a small handheld power tool that drives a five-inch disc for cutting metal, grinding welds, and light masonry. In the UK you look at that size when a 115 mm wheel feels short on reach and a 230 mm machine is too heavy for a bench or a van. You recognise a suitable example by the guard diameter, the supply it is built for, and whether the listing is corded or a battery body. The guard should be marked for 125 mm. Do not fit a larger wheel because the spindle thread matches. A corded tool for a ring main is around 230 V with a BS 1363 plug. A 110 V tool belongs on a site transformer, not a domestic socket. A cordless listing includes a battery and charger only when they are named, and a disc is separate. Voltage, disc size, the plug, and corded versus cordless are set out in the [125 mm angle grinder buying guide](/hub/tools/bosch-angle-grinder-125/sub/bosch-angle-grinder-125-buying-guide).
A 125 mm angle grinder is a small handheld power tool that drives a five-inch disc for cutting metal, grinding welds, and light masonry.
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Personal buying guide
Question 1 of 2
What supply will you use?
The 110 V GWS 12-125 (06013A6160) is listed at about £101.71 with 1,200 W on the specification and the same keyless guard idea as the 240 V sibling. It is meant for transformer-fed site practice, not for plugging into a domestic 230 V socket without the correct reduced-voltage supply. The amazon.co.uk line shows 5.0 from four reviews — a perfect average that still tells you almost nothing about failure rates because the sample is tiny. Stored UK review notes mention preferring corded site power over batteries for long cuts, but that is anecdote, not a statistic. Box contents mirror the other GWS 12-125 family listing: guards, handle, flange, nut, spanner, no disc. At 2.4 kg it is the heavier corded path here, with the voltage constraint as the deciding factor rather than wattage alone.
Pros
Cons
Best for: Trades already running 110 V centre-tap transformers on site who want a 125 mm Bosch with a keyless guard in that voltage class.
Less suitable: Home DIY on 230 V, buyers comparing purely on star averages, or anyone without a compliant site transformer setup.
Specifications
Common questions
Can I plug this into a UK home socket?
No. The specification is 110 V for transformer-fed site practice, not a normal 230 V ring main.
How does it differ from the other GWS 12-125 listing?
Same 125 mm family and keyless guard idea, but this listing is 110 V and model 06013A6160, not the 240 V listing.
Is a disc included?
Included components do not list a cutting or grinding disc.
The GWS 7-125 on amazon.co.uk is listed at about £71.98 with 720 W, a fixed 11,000 rpm, and a 125 mm guard line in the specification. At 4.7 from 22,017 reviews it is the statistical anchor in this comparison, and UK texts often praise the slim 176 mm grip and a head that stays flat enough for awkward cuts. The carton includes guard, handle, flange, nut, and spanner, not a cutting or grinding disc, so your first job still needs a rated wheel. Restart protection is stated; there is no variable speed on the table. Two verified UK reviews report a two-pin plug and adapter rather than a moulded BS 1363 plug, which matters before you rely on it on a ring main. At 2 kg on the listing it sits lighter than the GWS 12-125 pair here, which helps on longer sessions even though the motor is the smaller 720 W class.
Pros
Cons
Best for: Home DIY on 230 V who wants the most-reviewed 125 mm Bosch corded tool and will check the plug in the box before first use.
Less suitable: Site work on a 110 V transformer supply, buyers who need keyless guard adjustment, or anyone who will not verify plug type on delivery.
Specifications
Common questions
Is a cutting disc included?
No. Included components list the guard, handle, flange, nut, and spanner, not a disc.
Does it have variable speed?
No. The specification lists a fixed 11,000 rpm and no speed-control row.
Will the plug fit a UK socket?
The table says 230 V, but two UK verified reviews report a two-pin plug with an adapter. Check what arrives before use.
The GWS 18V-8 body is listed at about £89.44 without battery or charger, at 800 W on the amazon.co.uk line and 1.22 kg in the specification — the lightest bare tool here. Stars are 4.7 from 531 reviews, a solid cordless sample though still far smaller than the GWS 7-125 corded count. Listing copy and one UK review disagree on whether the guard is for 115 mm or 125 mm discs, and the specification table does not settle it, so you must read the guard label on the unit you receive before mounting wheels. Included items are guard, handle, flange, locking nut, and two-hole spanner; a UK review notes there is no quick-release disc nut. This is the best-value mark in the set for blue Professional 18 V owners who already have packs, not for someone treating about £89 as a complete grinder kit.
Pros
Cons
Best for: Existing Bosch Professional 18 V users who need a portable grinder in this class and will confirm guard size on delivery before buying discs.
Less suitable: First-time buyers without batteries, green POWER FOR ALL packs only, or jobs that need uninterrupted hours of heavy grinding on one charge.
Specifications
Common questions
Does the GWS 18V-8 include a battery?
No. The style line says without battery or charger.
Is the disc 115 mm or 125 mm?
The listing conflicts. Listing copy says 115 mm. One UK review says 125 mm. The specification table states neither.
Does it have a quick-release disc nut?
A UK review says it does not. The box list is a locking nut and a two-hole spanner.
This GWS 12-125 listing is the 220–240 V corded variant at about £106.74, with 1,250 W on the amazon.co.uk table and model 06013A6170. It brings a keyless protection guard and a plastic clip-on cutting guard in the box list, which is the main daily-use upgrade over the screw-adjust guard story on the GWS 7-125. Weight is 2.4 kg on the specification, so you trade the slimmer 720 W ergonomics for more motor and quicker guard tweaks. The star line is 3.4 from only eight UK reviews, which is far too thin to read as a long quality track record next to the GWS 7-125’s 22,017-review line. No disc is listed in included components. No-load speed is not printed on this listing’s table, so compare rpm only from manufacturer documentation, not from this shelf page alone.
Pros
Cons
Best for: 230 V users who want keyless guard convenience and more motor headroom for longer metal or masonry sessions, and who accept judging quality from specifications rather than eight amazon stars.
Less suitable: Buyers who mainly trust review volume, tight-budget DIY, or anyone who needs a 110 V site supply — that is the sibling listing, not this one.
Specifications
Common questions
Is this a 110 V site tool?
No. This listing is the 220–240 V item. The 110 V variant is a different listing in this comparison.
Does it include a cutting disc?
No disc is listed in included components. A plastic clip-on cutting guard is included.
Can I trust the star rating?
The listing shows 3.4 from 8 reviews. That is too small a UK sample to treat as a long track record.
Four amazon.co.uk listings were scored from the stored pages dated 19 October 2026. There is no laboratory test. Stars are the listing line. The score is 0–100 from four parts: stars out of 40, review sample out of 25, fit as a 125 mm tool for a real UK supply out of 25, and value in this set out of 10. The highest total is the top pick, once. The highest value-part score that is not the top pick is best value, once. A 5.0 average on four reviews does not take the top pick, because the sample part is 2 and the total stays below 91. The weights below sum to 100.
Stars
40%Amazon star line divided by 5, then multiplied by 40, and rounded. The figure is the listing average, not a workshop trial.
Review sample
25%1,000 or more reviews score 25. 200 or more score 20. 50 or more score 12. 10 or more score 6. Fewer than 10 score 2. A tiny sample cannot outrank a deep UK file.
Fit for 125 mm use
25%Points need a stated 125 mm disc, a voltage that matches a real UK use, and a described guard. Plug complaints or an unresolved disc size deduct. A 110 V-only tool scores lower on fit in a mixed home-and-site set.
Value in this set
10%A corded tool under £80 with a deep UK review file scores 10. A body-only tool under £100, if you already own blue packs, scores 7. A site corded tool near £102 with a tiny sample scores 4. A dearer 240 V corded tool with eight reviews scores 3.
Buy the guard and the voltage before you buy a star line. A 125 mm wheel on the wrong guard, or a 110 V tool on a 230 V socket, is a safety error. A cordless shelf price is not a kit price. A review count under ten is not a long UK record.
A 125 mm Bosch angle grinder in this comparison is a blue Professional small grinder for a disc on an M14 spindle. It is either corded at the wall or an 18 V body without a battery. UK buyers here chose five-inch before the model details: more reach than 115 mm, without stepping up to a 230 mm machine.
The 110 V GWS 12-125 is for a site transformer. The ring-main GWS 12-125 is the 220–240 V listing. Swapping them is a safety and performance error.
The GWS 18V-8 price is the body. Battery, charger, and disc are extra. It suits you if you already own blue Professional 18 V packs, not green POWER FOR ALL packs.
The GWS 7-125 specification says 230 V. Two UK reviews report a two-pin plug and an adapter, not a moulded BS 1363 plug. Check the box before you rely on it.
All three corded listings state 125 mm. Do not mount a 125 mm wheel on a 115 mm guard from another tool because the spindle thread fits. The GWS 18V-8 is not settled: listing copy says 115 mm, one UK review says 125 mm, and the specification table states neither. Read the guard on the unit you receive. Voltage is the next hard split. The GWS 7-125 states 230 V. The GWS 12-125 at model 06013A6170 is 220–240 V for a normal UK ring main.
The GWS 7-125 is 720 W, 11,000 rpm, and 2 kg, with restart protection and a locking nut. The GWS 12-125 listings are about 1,200–1,250 W and 2.4 kg, with a keyless guard. The 240 V box list adds a plastic clip-on cutting guard. No-load speed is not printed on either GWS 12-125 shelf table. The GWS 18V-8 is 800 W on the listing and 1.22 kg, with a locking nut and a two-hole spanner. A UK review says there is no quick-release nut.
Three typical situations, each with a recommendation from this comparison.
You work from a normal UK ring main and you want the deepest review file. The GWS 7-125 is the top pick at about £71.98, with 720 W, 11,000 rpm, and 4.7 from 22,017 reviews. Two UK reviews report a two-pin plug, so check the box. The 240 V GWS 12-125 adds a keyless guard and 1,250 W at about £106.74, with only eight reviews.
You already run a 110 V centre-tap transformer. The 110 V GWS 12-125 is the only match here, at about £101.71, with 1,200 W and a keyless guard. Stars are 5.0 from four reviews, which is too small to treat as a track record. It does not belong on a domestic 230 V socket.
You already own Bosch Professional 18 V packs, not green POWER FOR ALL. The GWS 18V-8 body is best value at about £89.44, 1.22 kg, with 4.7 from 531 reviews. No battery, charger, or disc is in the box. Listing copy and one UK review disagree on 115 mm versus 125 mm, so read the guard before you buy wheels.
The top pick is the Bosch Professional GWS 7-125 at about £71.98: 720 W, 11,000 rpm, a stated 125 mm disc, and 4.7 from 22,017 amazon.co.uk reviews. Check the plug, because two UK reviews report a two-pin plug and an adapter. Best value is the GWS 18V-8 body at about £89.44 if you already own blue 18 V packs. It is 4.7 from 531 reviews, and the guard size is not settled on the listing. The 110 V GWS 12-125 is about £101.71 for a site transformer. The 240 V GWS 12-125 is about £106.74 with a keyless guard and only eight reviews. None of these scores is a laboratory test, and none of the boxes includes a disc.
Bosch Professional GWS 18V-8
Body-only at about £89.44 for owners of blue 18 V packs, 4.7 from 531 reviews, with the disc size still to confirm on 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.
Public UK sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the four amazon.co.uk listings captured on 19 October 2026. HSE HSG17 and PUWER apply at work. They are not a certificate for a domestic garage.
This page contains affiliate links to amazon.co.uk (tag pcuk26-21). If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are from the listings. This is not a laboratory test.
