The best double grinders, compared.
Top pick: Einhell TC-BG 150 B – Highest score for rust and a coarse K36 stone: 4.6 from 412 ratings, one stone and a wire brush. The Amazon block omits voltage, and the box has no K60 wheel. Best value: Einhell TC-BG 150 – Both stones at about £37.30, with the largest review file in the set, 4.4 from 1,056, if you check the guards and rests on arrival. Updated October 2026.
A double grinder in a UK shed is a bench grinder: one mains motor, usually two accessories, bolted to a stout bench. You deburr metal, rough a bevel, or clean rust, then hone a real edge on a stone. What matters is the wheel pair, a wattage that still makes sense once you read the duty type, a rest you can set close, and guards that arrived straight. When the edge must stay cool, use a [wet stone grinder](/hub/sanders/wet-stone-grinder) rather than grinding until the steel turns blue. Is finer, and it is still not a hone. A wire brush removes rust, paint, and scale. A mop is a swap you buy later, not what these boxes ship. Two of these listings are a bonded pair.
A double grinder in a UK shed is a bench grinder: one mains motor, usually two accessories, bolted to a stout bench. You deburr metal, rough a bevel, or clean rust, then hone a real edge on a stone.
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Personal buying guide
Question 1 of 2
Which pair do you need in the box?
The Einhell model 4412634 is a 7.9 kg, 150 mm bench grinder at £64.95 that ships one K36 stone and one wire brush, not a K60 wheel. It has 4.6 from 412 amazon.co.uk ratings, the highest star line in this set, and rank 19 in Bench Grinders in the extract. The raw file's six United Kingdom reviews are short and positive: home use, a compact machine, and one owner who sharpened whittling knives. Amazon states 350 W as power S6 at 2,980 rpm and leaves the voltage line empty; the service sheet states 220–240 V, 185 W continuous, and S6 350 W at 15 percent. Reviews from other marketplaces on the same ASIN, which those six UK texts do not repeat, say the brush sheds wires, the tool rests are poor, and the motor needs a rest after about 15 to 20 minutes. The spark shields adjust without tools and are not eye protection to BS EN 166. It is the top pick in this set on the published star line when rust and a coarse stone are the job, and you will not treat a six-review UK slice as a full durability test.
Pros
Cons
Best for: Rust, paint, and a coarse stone, if you add a face shield over glasses and you do not need a K60 wheel today.
Less suitable: You need a fine stone on the first day, or you will treat the spark window as eye protection.
Specifications
Common questions
Does this model include a fine stone?
No. The included components are one bench grinder, one grinding wheel and one brush disc. The highlight describes a coarse K36 wheel and a wire brush, not a K60 stone.
What is the brush disc for?
The bullets say the 150 mm brush is for removing rust, removing paint and cleaning tools. Reviews on the same ASIN warn that the brush sheds wires, and they tell you to use the guards and eye protection.
What mains voltage does the listing give?
The specification block does not state a voltage. It states 350 W, described as power S6, and a maximum idle speed of 2,980 rpm.
The Einhell TC-BG 150, model 4412632, is a 5.89 kg bench grinder that turns a 150 mm K36 wheel and a 150 mm K60 wheel at a stated 2,980 rpm, listed at £37.30. Across 1,056 amazon.co.uk reviews it sits at 4.4, and the extract ranks it 1 in Bench Grinders, which is a sales rank rather than a measured test. Amazon prints 150 W at 230 V and does not print a duty suffix; Einhell's service sheet lists 110 W continuous and S6 150 W at 15 percent, so a few hard minutes can be the whole rating. UK reviews praise it as a quiet starter for garden tools and hedge-trimmer blades, and they also describe a motor that gets hot quickly and a bolted bench that shakes. The same UK notes include wheel nuts that spin together, so a disc change needs a workaround, plus cartons missing rests or spark guards and guards that arrive bent. There is no work light on the listing. It is the best value in this set when you want both stones for light deburring, and you will return a machine whose rests or guards are missing rather than grind without them.
Pros
Cons
Best for: Light K36 and K60 work on a small bench, if you check the guards and rests on the day it arrives.
Less suitable: A long continuous grind, or a weekly rust job that needs a wire brush in the box.
Specifications
Common questions
What can this 150 mm grinder be used on?
The amazon.co.uk bullets say sharpening scissors, knives and blades, plus derusting, deburring and grinding wood, plastic and metal. They also mention minor repairs and shape corrections. The page does not list a wire wheel in the box.
Does the TC-BG 150 have adjustable speed?
The listing does not describe a variable-speed control. It states one maximum rotational speed, 2,980 rpm, at 150 W and 230 V.
Are the wheels easy to change?
The listing says the spark guard windows adjust without tools. It does not say the wheels come off without tools. UK reviews include a report that both nuts spin together, which makes the discs hard to undo.
The Einhell TC-BG 200 L, model 4412633, is the heavy stone-pair machine in this set: 200 mm by 16 mm K36 and K60 wheels, a swivelling LED, and 12.1 kg on the Amazon extract, at £85.00. It has 4.3 from 363 reviews and sits at rank 12 in Bench Grinders in that extract. Amazon states 400 W at 2,980 rpm and 230 V AC; Einhell and Halfords split the same model into 185 W continuous and 400 W S2 for 30 minutes, so the title watt is a short-time figure. UK buyers praise a wheel that does not bog down easily on chisels, and they also report stones that are not concentric until dressed, plus a retaining washer with a hole too large for the shaft. The LED has no separate switch and stays on while the motor runs, and one buyer found the weight too much to lift and said they should have bought the 150 mm model. The Amazon page also carries a staple-gun bullet and the name TH-BG 200L beside article 4412633, and the bore is not one figure across Amazon, Toolstation, and Einhell Service. It suits a permanent bench if you can fix about 12 kg and you measure the shaft before you order a spare wheel.
Pros
Cons
Best for: A fixed bench where you want both stones and a light, and you can bolt down about 12 kg.
Less suitable: A shed where you must lift the machine onto the bench, or you need a separate switch for the light.
Specifications
Common questions
Does this 400 W grinder include a light?
Yes. The bullets describe a swivelling LED light for the work area. A UK review says the light has no separate switch and comes on with the motor.
Which wheels are in the box?
The item highlight states 200 mm by 16 mm coarse and fine wheels, grit K36 and K60. The listing does not state the bore. One bullet on the same page describes a staple gun and is not a grinder specification.
Can you change the speed?
The listing gives a single maximum of 2,980 rpm at 400 W and 230 V AC. It does not mention a variable-speed dial.
Scores start from the amazon.co.uk star rating times 20, rounded to a whole number, then one deduction of 4 points. That deduction is repeated UK arrival faults, a listing that describes a different product, or a specification block that omits mains voltage. A short UK slice inside a large star count is noted and is not a second deduction. There is no laboratory grind and no measured duty cycle. Three listings are on this page.
Amazon star line
70%The base is the amazon.co.uk star rating times 20, rounded to a whole number. In this set that base is 92, 88, and 86 before the single deduction.
Arrival condition
10%Repeated UK reports of parts missing, guards bent, or wheel nuts that spin together take 4 points off once. Only one deduction applies to each listing.
Listing match
10%A bullet that describes a different product, or a highlight name that is not the model number's name, takes 4 points off once.
Voltage on the listing
10%If the Amazon specification block does not state a mains voltage, the score drops by 4 once. The service sheet can still state 220–240 V. That gap is the deduction, not a second one.
Start with the accessory pair, not the star line. K36 cuts fast. K60 is finer and still not a hone. A wire brush removes rust, paint, and scale. Then read the duty suffix beside the watt, because the headline figures on these three listings are not the same kind of power. Bolt the machine to a stout bench, set the rest only when it is isolated, and treat the spark window as a shield rather than as eye protection.
A double grinder in UK shops is a bench grinder. One mains motor drives two ends. You bolt it to a bench, then deburr metal, rough a bevel, or clean rust. A real cutting edge is finished on a stone afterwards. K36 cuts fast. K60 is finer, and it is still not a hone. A wire brush removes rust, paint, and scale. A mop is a swap you buy later, not what these boxes ship. Two of these listings are a bonded pair. The TC-BG 150 and the TC-BG 200 L both include K36 and K60.
Amazon prints 150 W, 400 W, and 350 W S6. Einhell marks the 200 L as S2 400 W for 30 minutes. Service sheets show 110 W or 185 W continuous beside those short-time figures. A few hard minutes can be the whole rating. Compare the suffix.
The TC-BG 150 B ships one K36 stone and one wire brush. K60 is on the TC-BG 150 and the TC-BG 200 L. A wire brush cleans rust, paint, and scale. It does not replace a hone, and these grey wheels are not for carbide tips.
For the 200 L, Amazon prints 200 mm by 16 mm, Toolstation prints bore 32 mm, and Einhell Service prints mount 16 mm with wheels 200 by 32 by 25 mm. The TC-BG 150 service sheet says mount 12.7 mm. Measure the shaft on the machine you have before you order a wheel.
The first split is what is on the two ends. K36 cuts fast. K60 is finer and still not a hone. A wire brush removes rust, paint, and scale. The TC-BG 150 and the TC-BG 200 L are a bonded pair, K36 and K60, so you can rough and then take a slightly finer pass before the real edge goes to a stone. The TC-BG 150 B is one K36 stone and one wire brush. That is the top pick when rust and a coarse stone are the job, and it is the listing to skip when you need a fine stone on the first day.
All three state 2,980 rpm and no speed dial, so the wattage is the difference, and only if you read the duty type. Amazon prints 150 W on the TC-BG 150, 400 W on the TC-BG 200 L, and 350 W S6 on the TC-BG 150 B. Einhell marks the 200 L as S2 400 W for 30 minutes. Service sheets show lower continuous figures: 110 W with S6 150 W at 15 percent, 185 W with S6 350 W at 15 percent, and 185 W with S2 400 W for 30 minutes. Those are not three versions of the same watt.
Three typical situations, each with a recommendation from this comparison.
You deburr and rough a chisel, then hone the real edge on a stone. The TC-BG 150 gives you K36 and K60 at about £37.30 and 5.89 kg. It is the best value for that light work if you check the guards and rests on the day it arrives. K60 is finer than K36, and it is still not a hone.
You want rust, paint, or scale off secateurs and other tools, plus a coarse stone in the same box. The TC-BG 150 B ships a K36 wheel and a wire brush at about £64.95 and 7.9 kg. It does not include a K60 stone. The spark window is not eye protection to BS EN 166.
You can bolt down about 12 kg and you want both stones plus a light. The TC-BG 200 L is 12.1 kg on Amazon, with 200 mm K36 and K60 wheels and a swivelling LED, at about £85.00. Measure the shaft before you order a spare. The bore is not one figure across Amazon, Toolstation, and Einhell Service.
The top pick is the Einhell TC-BG 150 B at about £64.95 when the job is rust and a coarse K36 stone. It has the highest score in this set, 4.6 from 412 ratings, and the box has no K60 wheel. Only six UK review texts were in the raw file. The best value is the TC-BG 150 at about £37.30, with K36 and K60 and 4.4 from 1,056 reviews, if you check the guards and rests on arrival. The TC-BG 200 L suits a bench that can take about 12 kg when you want both stones and a light. None of these scores is a laboratory grind.
Einhell TC-BG 150 B
Highest score for rust and a coarse K36 stone: 4.6 from 412 ratings, one stone and a wire brush. The Amazon block omits voltage, and the box has no K60 wheel.
Einhell TC-BG 150
Both stones at about £37.30, with the largest review file in the set, 4.4 from 1,056, if you check the guards and rests on arrival.
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.
amazon.co.uk listings, Einhell UK, Einhell Service, Toolstation, and HSE HSG17. Prices and stars are the amazon.co.uk figures in those listings. Prices move.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Scores compare published listings and review counts. They are not a laboratory grind.
