Angle grinder injury statistics

01What are the key findings?

• About 40,000 injuries involving workshop grinders, buffers and polishers (a category that includes bench grinders, not only angle grinders) were treated in US emergency departments in 2024, with a 95% confidence interval of 31,899 to 48,047 injuries (CPSC NEISS).
• That is the highest point estimate of any power tool group in the 2024 NEISS data (about 195,900 injuries across all power tools), though its interval overlaps chain saws and table saws.
• Eyes come first: in the 2024 NEISS grinder, buffer and polisher data, 48% were eye injuries (injuries to the eyeball), and foreign bodies were the second most common diagnosis after cuts.
• Amputations were rare in the US emergency department data for this category, at 0.3% of 2024 injuries against 4.2% for all power tools, and that grinder figure rests on very few sampled cases.
• In a 2022 study of 928 angle grinder hand-injury patients at an Argentine hospital (2016 to 2020), 84.5% were cutting wood or firewood when hurt and 15.5% lost part of a finger.
• In a 2023 Korean multicentre emergency department study (2011 to 2018), 23.0% of grinder injuries were to the head, more than double the share for other high-speed cutting tools.
• The UK Health and Safety Executive tells employers to assume about 7 m/s² of hand-arm vibration for a 100 to 180 mm angle grinder, enough to pass the UK daily exposure action value after roughly 1 hour of trigger time.
• The 2024 US estimate is up on 2023, but the two years' confidence intervals overlap and NEISS changed its hospital sample around 2024, so the data do not show a confirmed rise.

02How many angle grinder injuries happen each year in the US?

US hospital emergency departments treated an estimated 40,000 injuries involving workshop grinders, buffers and polishers in 2024, according to the National Electronic Injury Surveillance System (NEISS), a weighted sample of US hospitals run by the Consumer Product Safety Commission (CPSC). Yearly estimates from 2015 are in the table below.

NEISS has no separate code for angle grinders. Codes 897, 898 and 899 together cover workshop grinders, buffers and polishers, which takes in bench grinders and polishing tools as well as hand-held angle grinders. Quote the figure as "injuries involving workshop grinders, buffers and polishers"; in a headline, "grinder injuries" is safer than "angle grinder injuries".

03Are grinder injuries increasing?

The data do not show a clear rise: the 2024 estimate is the highest in the ten-year series, but its confidence interval overlaps 2023's and those of most earlier years. CPSC also announced in 2021 that NEISS was moving to a redesigned hospital sample, with 2024 possibly the first year estimated from it, and earlier years are not recalculated, so part of any 2023 to 2024 change may reflect the sample itself. A fair summary is that grinder-related emergency visits have run at a broadly similar level for a decade, with 2024 at the top of that range. "Grinder injuries surged in 2024" is not supported by these figures.

04What share of grinder injuries are eye injuries?

Almost half: in the 2024 NEISS data for workshop grinders, buffers and polishers, 48% were eye injuries (coded as the eyeball), far ahead of fingers and hands. Cuts were the most common diagnosis and foreign bodies, mostly grit, metal or wheel fragments in the eye, came second.

05Why do grinders hurt eyes and heads so often?

Grinders throw material: sparks, grit, scale, wire from brushes and, when a wheel fails, pieces of the wheel. The pattern shows up outside the US too. In a 2023 Journal of Trauma and Injury study of 8,697 Korean emergency department visits for high-speed cutting tool injuries (2011 to 2018), 23.0% of grinder injuries were to the head, against 10.2% for other cutting tools.

On the accessory side, the guard on a portable grinder may leave no more than 180 degrees of the wheel exposed, and it must suit the disc: an open Type 27 guard for depressed-centre grinding wheels, a closed two-sided guard for cut-off and diamond wheels, and the guard kept on for wire brushes. The guide to choosing cut-off wheels shows which wheel takes which guard. Eye protection covers what the guard cannot, on bench grinders as much as angle grinders.

06How common are amputations from angle grinders?

In US emergency department data, amputations are a small part of grinder injuries: 0.3% of the 2024 estimate for workshop grinders, buffers and polishers, against 4.2% across all power tools. That grinder share rests on a handful of sampled cases, below CPSC's reliability thresholds, so read it as "rare in this category" rather than a precise rate; bench grinders and buffers, which rarely sever fingers, also dilute it.

Hospital studies of angle grinders alone look at patients sent to hand surgeons, and find much more severe injuries:

• Argentina, 928 angle grinder hand-injury patients at one hospital, 2016 to 2020 (published 2022): traumatic finger amputations made up 15.5% of cases.
• Turkey, 79 hand and forearm injuries from angle grinders treated in 2020 to 2022 (Istanbul Medical Journal, 2024): for working patients, 7.13 weeks average off work.

These describe specialist-centre patients, not all grinder users.

07What are people doing when an angle grinder injures them?

In the Argentine study of 928 angle grinder hand-injury patients (2016 to 2020), 84.5% were cutting wood or firewood when hurt, and only 12.1% were cutting metal, the job the tool is made for. Only 22.4% wore protective equipment, which the study defined as gloves. NEISS does not code the task in a countable way, so there is no matching US figure.

Cutting wood on a grinder usually means fitting a toothed saw blade or a chain-type carving disc. Grinder makers forbid both because they snatch and kick back, pulling the tool toward the hand steadying the work. For timber, use a saw; the guide to angle grinder disc sizes lists what a grinder is designed to take.

08Who gets hurt by grinders?

Grinder injuries in the 2024 US data are spread across adult age groups, with people aged 35 to 54 the largest group (35.3%). Men made up 98.5% of the injured. Home was the most common recorded location (30.4%), but most records do not state one, so the home and workplace split cannot be estimated with confidence.

09How much does an angle grinder vibrate?

The UK Health and Safety Executive (HSE) advises employers to assume about 7 m/s² for a 100 to 180 mm angle grinder in real use when they have no better data, and about 4 m/s² for a 100 or 125 mm grinder fitted with a flap disc. At the general grinder value, HSE says a user passes the UK daily exposure action value after roughly 1 hour of trigger time. Vibration exposure is a long-term health risk (hand-arm vibration syndrome) rather than an emergency department injury, so it does not appear in the NEISS figures above.

10Do declared vibration figures match real use?

Not reliably. In HSE research report RR717 (Health and Safety Laboratory, 2009), manufacturers' declared values underestimated the in-use vibration risk for 5 of 5 grinders tested. Sources also disagree on which handle is worse: the NIOSH Power Tool Database (PDF dated 2006, catalogued by CDC in 2011; no longer updated) found the side handle higher on every grinder, peaking at 23.4 m/s² (highest left-hand reading), while a 2026 Brazilian field study of six welders in 2025 found readings up to 10.5 m/s² (highest rear-handle reading). Methods differ, so treat both handles as able to exceed limits.

The accessory matters too. A disc whose hole or thread does not match the spindle runs out of balance, and any accessory that runs untrue or vibrates should not be used; see grinder disc vibration troubleshooting. The lower HSE value for flap discs is one reason to finish with flap discs for metal where the job allows. To turn a vibration value and trigger time into a daily dose, use the hand-arm vibration exposure calculator.

11How loud is an angle grinder?

Loud enough to need hearing protection: the NIOSH Power Tool Database (2006 data, catalogued in 2011) lists 95–107 dB(A) sound power, loaded, for 18 corded angle grinders. Sound power describes what the tool emits, not the level at your ear, so it is not directly comparable with hearing-protection limits. The 2026 Brazilian field study measured welders' actual exposure in 2025 at 84.4–101.0 dB(A) daily noise exposure, with the lowest reading from the one task done with a flap disc. The power tool noise data compare grinders with other tools.

12Which disc, guard and speed checks prevent which grinder injury?

Five checks before the trigger is pulled cover most accessory-related grinder failures. The rules come from OSHA, ANSI-based maker guidance and grinder manuals.

13When do these figures not apply?

A common misreading is that "40,000 injuries a year are caused by angle grinders". The NEISS figure counts emergency department visits involving any workshop grinder, buffer or polisher, bench grinders included, and leaves out injuries treated at urgent care, workplace clinics or a doctor's office. It is neither an angle grinder count nor a count of all grinder injuries.

• A NEISS product code records that a product was involved, not that it caused the injury or that an accessory failed.
• NEISS covers the United States only. The Argentine, Korean and Turkish figures describe particular hospital patient groups.
• Small breakdowns, such as amputations, often fall below CPSC reliability thresholds and are flagged in the CSV.
• Vibration and noise figures come from different methods (declared, laboratory and field) and should be quoted with their source.

For saws, drills and nail guns, see the power tool injury statistics.

14How was this data produced?

US injury estimates. AccessoryFit downloaded CPSC's public NEISS case files for 2015 to 2024 and selected cases with product codes 897, 898 or 899 (workshop grinders, buffers and polishers). Summing each sampled case's weight gives the national estimate, the method CPSC uses. The 95% confidence intervals use a with-replacement variance estimate across NEISS strata and hospital sampling units. Following CPSC's publication thresholds, figures based on fewer than 20 sampled cases, an estimate under 1,200, or a coefficient of variation over 33% are marked unreliable; they stay in the CSV with a flag but are left out of the charts and tables here. Body part, diagnosis, age and location are NEISS's own coded fields.

Comparability. CPSC's 2021 Federal Register notice described a redesigned hospital sample, with 2024 possibly the first year based on it. Earlier years are not recalculated, so compare 2024 with them cautiously.

Other studies. Argentine, Korean, Turkish and Brazilian figures are taken from the published results; where a paper's abstract and results disagreed (severity splits, an odds ratio, a glove-use share), the figure was left out. Vibration values come from HSE guidance L140 (2019) and report RR717 (2009); noise and laboratory vibration values from the NIOSH Power Tool Database (PDF dated 2006, catalogued by CDC in 2011). AccessoryFit did not test or measure any tool.

15How should you cite this data?

Suggested citation: AccessoryFit, "Angle grinder injury statistics", updated 22 October 2026, https://accessoryfit.com/research/angle-grinder-injury-statistics/

The data, tables and charts on this page are free to reuse under the Creative Commons Attribution 4.0 licence (CC BY 4.0) with a link to this page. When quoting the US figure, keep the wording "workshop grinders, buffers and polishers" or note that it includes bench grinders. The underlying NEISS data belong to the US Consumer Product Safety Commission. More datasets are in the power tool research and data section.

16Download the data

The CSV files hold every year, tool group and breakdown used here, including rows flagged as unreliable, sample case counts and confidence intervals. Grinder rows are labelled "Workshop grinders, buffers and polishers".

• US power tool injury estimates, 2015 to 2024 (CSV) CSV, 11 KBYearly NEISS estimates by tool group with codes, sample cases, amputation estimates, confidence intervals and reliability flags.
• 2024 injury breakdowns by tool group (CSV) CSV, 19 KBBody part, diagnosis, disposition, location, sex and age band for each tool group, with reliability flags.
• Chart: grinder injury trend, 2015 to 2024 (PNG) PNG, 68 KBLine chart with 95% confidence band, 1200 by 675 px.
• Chart: grinder injuries by body part, 2024 (PNG) PNG, 39 KBBar chart of reliable body-part categories, 1200 by 675 px.

17Questions readers ask