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230 mm angle grinder buying guide for UK buyers

Updated: 22 October 2026

You are about to pay for a corded tool that can cut deeper than a small grinder, but the same amazon.co.uk search also shows twin packs, disc cutters and model names that look like nine inches when the disc is not. This 230 mm angle grinder buying guide walks through disc class, power, speed, the guard, the plug and what should be in the box. The kept listings are in the [9 inch angle grinder comparison](/hub/tools/9-inch-angle-grinder). When you already know the job and want a model matched to it, use the [best 9 inch angle grinder](/hub/tools/9-inch-angle-grinder/sub/9-inch-angle-grinder-best) page. Peter F. checked those listings on 19 October 2026. There was no laboratory test. A qualifying purchase can earn a commission at no extra cost to you.

You are about to pay for a corded tool that can cut deeper than a small grinder, but the same amazon.co.uk search also shows twin packs, disc cutters and model names that look like nine inches when the disc is not.

Our top picks

Evolution Evolution R230DCT

Best overall

Evolution Evolution R230DCT
9.4/10about £119.95
View offer
Bosch Bosch GWS 22-230 P

Alternative

Bosch Bosch GWS 22-230 P
8.6/10about £156.07
View offer
Einhell Einhell TE-AG 230/2000

Best value

Einhell Einhell TE-AG 230/2000
8.0/10about £68.99
View offer
On this page
  1. 1.What a 9 inch grinder actually is
  2. 2.Power, speed and depth
  3. 3.Guard, handle, soft start and the box
  4. 4.230 V at home, 110 V on site

What a 9 inch grinder actually is

In the UK, 9 inch and 230 mm describe the same abrasive wheel class on a handheld angle grinder. The wheel diameter sets how deep a straight cut can reach, how fast the spindle turns and how much weight you hold at arm's length. It is not the same as every Bosch model code that contains a nine. The Professional GWS 9-115 is a 115 mm grinder where the nine is a power class, not inches. If the listing title says 9 inch but the specification line prints 115 mm or 4.5 inch, you are looking at a small grinder, not the machine this guide covers. The comparison also keeps shapes that are easy to misread. The JCB twin pack ships a 115 mm grinder and a 230 mm grinder in one carton, which is two tools, not a single 9 inch buy. The Evolution R230DCT is a wheeled disc cutter for masonry, not a side-handle grinder for freehand metal work. Check the disc class line before watts, badges or star ratings. When you are choosing size first, read 230 mm vs 115 mm angle grinder.

Power, speed and depth

Corded 230 mm machines in the kept set sit in a 2,000–2,350 W band. Printed no-load speeds are 6,000 rpm or 6,500 rpm where the listing states them. Retailer guides such as Screwfix quote guide depths around 70 mm for 230 mm and about 30 mm for 115 mm. Top7tools.uk cites published Makita depths near 68 mm on a 230 mm example. Treat those figures as guides for named products or counter tables, not as a depth you measured on your slab. The disc must be rated for at least the grinder's speed. Wheels over 80 mm fall under marking rules described in HSE HSG17 and BS EN 12413: the maximum rpm on the disc must meet or exceed the tool speed. A Norton table following EN 12413 gives roughly 6,650 rpm for a 230 mm wheel at 80 m/s, which is why a 230 mm disc is not interchangeable with a 115 mm disc even if you could physically mount it. Buy 230 mm when the cut you repeat is deeper than a small disc can finish in one pass. Stay with 115 mm or 125 mm for bolts, tiles and most dressing work unless you accept hire or a second machine.
Evolution Evolution R230DCT

Testsieger

Evolution Evolution R230DCT
9.4/10about £119.95
View offer

Guard, handle, soft start and the box

A legal setup for bonded wheels expects a guard, a side handle used with both hands, and a wheel chosen for cutting or grinding, not the wrong task. FEPA's bonded-abrasives leaflet is blunt: do not remove the guard, do not grind with a cutting disc, and do not twist a cut. On the listings we track, look for lines you can verify: tool-free or spanner-adjusted guard, three-position side handle, spindle lock for disc changes, and soft start if snatch on switch-on worries you. Soft start appears on the DEKOPRO, both Einhell rows and not on the Bosch GWS 22-230 P listing. A UK reviewer reports kick when that Bosch starts. With disc in a title is not proof. The Einhell TE-AG 230/2000 highlight says without a cutting disc. The 2,350 W Einhell lists a disc in marketing bullets while several UK reviewers say none arrived. The DEKOPRO includes a 230 mm grinding wheel. The Evolution cutter includes a diamond masonry blade. Weights matter for fatigue: Hilka is listed at 4.94 kg, the Evolution cutter at 7.1 kg, and the JCB 8.04 kg figure is the whole twin pack.

230 V at home, 110 V on site

Home sockets in Great Britain are 230 V with a BS 1363 plug. Trade counters also sell 110 V tools fed from a centre-tapped transformer on site. The Bosch GWS 22-230 P listing prints 120 V on the specification while a UK reviewer reports a 230 V tool with a UK three-pin plug and calls the voltage line wrong. Do not rewrite the listing to 230 V in your notes. Photograph the rating plate on delivery and reject a mismatch. The DEKOPRO lists 220 V, which is common on import lines but still needs a UK-safe plug arrangement when you unpack. Skip a 9 inch purchase entirely if a 115 mm grinder already clears your material, if you only need one shallow cut and hire is cheaper, or if you expected a cordless 230 mm kit at these amazon.co.uk prices. Every kept row here is corded. Entry shelf prices on 19 October 2026 run about £45.89 for the DEKOPRO and £54.95 for the Hilka, with the Evolution cutter at about £119.95 and the Bosch handheld at about £156.07. When you move from checklist to technique, read how to use a 9 inch angle grinder before the first cut.

Common questions

Is 2,000 W enough for a 230 mm grinder?
Yes for the domestic and light trade jobs these listings target. Higher wattage, as on the 2,350 W Einhell, may help on long masonry runs, but it does not replace the correct disc, guard position or dust plan.
Do I need 110 V or 230 V at home?
For a house or garage on UK mains, insist on a tool that matches 230 V and a UK plug. Choose 110 V only when your workplace already runs a transformer and mandates it.
What rpm should the disc allow?
At least the printed no-load speed of the grinder, and for 230 mm class wheels typically around 6,000–6,650 rpm depending on diameter and marking. If the disc rpm is lower than the tool, do not fit it.
Should soft start be on the checklist?
It is worth prioritising if you are new to large grinders or share the tool with occasional users. It is not a substitute for the guard, a two-hand grip or unplugging while you change discs.
Does with disc mean a disc is in the carton?
Not reliably. Read the included-components bullet and recent UK reviews. Budget separately for a diamond blade on paving jobs.
How heavy is a 9 inch grinder in this set?
Single handheld bodies run from about 4.94 kg on the Hilka to 6.4 kg on the 2,350 W Einhell. The Evolution cutter is 7.1 kg with its wheeled frame.
When is a twin pack the wrong buy?
When you only need one 230 mm grinder, or when you already own a 115 mm tool and would pay twice for redundancy. The pack makes sense when you will use both sizes regularly.

Related pages

Angle grinder for paving slabs

9 inch angle grinder

Best 9 inch angle grinder picks for UK jobs in 2026

How to use a 9 inch angle grinder: the guard and disc

230mm vs 115mm angle grinder: which size fits the job

Sources

Public UK sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the seven amazon.co.uk listings captured on 19 October 2026. PUWER, HSG17 and the silica limit apply at work. They are not a certificate for a domestic grinder. A dust port is not extraction on its own.

  1. HSE, PUWER overview (retrieved 19 October 2026)
  2. HSE, HSG17 Safety in the use of abrasive wheels (retrieved 19 October 2026)
  3. HSE, Chasing concrete and raking mortar (retrieved 19 October 2026)
  4. HSE, INDG463 Control of exposure to silica dust (retrieved 19 October 2026)
  5. HSE, Angle grinder bulletin (retrieved 19 October 2026)
  6. FEPA, Safety leaflet for bonded abrasives (retrieved 19 October 2026)
  7. Screwfix, Angle grinder buying guide (retrieved 19 October 2026)
  8. Electrical Safety First, Angle grinders (retrieved 19 October 2026)