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General Industry (29 CFR 1910)

Guarding of Portable Powered Tools

Verified vs OSHA sources · 2026-10-05

29 CFR 1910.243

29 CFR 1910.243 sets guarding requirements for portable powered tools in general industry. It requires guards on the hazardous parts of handheld tools, for example, portable circular saws with a blade over 2 inches must have guards above and below the base plate, abrasive grinders need wheel guards, and belt sanders must be guarded, so the moving blade, wheel, or belt cannot contact the operator.

29 CFR 1910.243 at a glance

What it covers
Guarding of portable powered hand tools in general industry
Circular saws
Blades over 2 inches need guards above and below the base plate
Lower guard
Must retract on cut and automatically return when withdrawn
Grinders
Portable abrasive wheels need wheel guards
Other tools
Belt sanders and similar tools must be guarded
Max penalty (2026)
$16,550 per serious violation; $165,514 per willful

What 29 CFR 1910.243 requires (plain English)

29 CFR 1910.243 sets the guarding requirements for portable powered tools and equipment in general industry: the handheld saws, grinders, sanders, and similar power tools used across manufacturing and maintenance. It complements the machine-guarding requirements for fixed machinery by addressing the tools workers hold.

Specific requirements include: portable, power-driven circular saws with a blade diameter greater than 2 inches must be equipped with guards above and below the base plate or shoe, with the lower guard covering the blade to the depth of the teeth and automatically returning to cover the blade when the saw is withdrawn from the work; portable abrasive grinders, cutoff wheels, and similar tools must have wheel guards; belt-sanding machines must have guards at the nip points and unused runs of the belt; and pneumatic and other powered tools have their own safe-use provisions.

The recurring theme is that the guard must be functional, not defeated. Circular-saw lower guards in particular are frequently tied back or wedged open because they can stick, but a spinning, unguarded blade on a saw set down or carried is a direct laceration and amputation hazard. 1910.243 requires these guards to be present and working, and defeating them is a common citation.

The regulatory text

“All portable, power-driven circular saws having a blade diameter greater than 2 in. shall be equipped with guards above and below the base plate or shoe.”
29 CFR 1910.243(a)(1)(i)

Key facts about 29 CFR 1910.243

  • Portable circular saws over 2-inch blade need guards above and below the base plate (1910.243(a)(1)(i)).
  • The lower guard must retract on cut and automatically return when withdrawn.
  • Portable abrasive grinders and cutoff tools need wheel guards.
  • Belt sanders must be guarded at nip points and unused belt runs.
  • Guards must be functional, not tied back or wedged open.
  • It complements the fixed-machine guarding standard (1910.212).
  • Defeated lower saw guards are a common citation.

Scope: who 29 CFR 1910.243 applies to

Regulatory framework
General Industry (29 CFR 1910)
Citation reference
29 CFR 1910.243
Enforcement status
In force and enforced
Jurisdiction
Federal OSHA (29 State-Plan jurisdictions may be stricter)

State-Plan states (e.g. California, Washington, Michigan) operate OSHA-approved programs that must be at least as effective as federal OSHA and frequently impose higher penalties or additional requirements. Confirm the rule as adopted in your state.

Key requirements of 29 CFR 1910.243

#Employer obligation
1Guard portable circular saws with upper and lower guards
2Guard grinders per abrasive wheel standards
3Equip powder-actuated tools with safety devices
4Require training for powder-actuated tool operators

Summarized from the text of 29 CFR 1910.243. Always read the full regulation for the binding language.

Common Portable Tool Guarding violations

Deficiencies OSHA cites under 29 CFR 1910.243 include the ones below, in no particular order. Distinct deficiencies can be cited as separate items, and each serious item carries up to $16,550 (2026). Broader per-instance stacking exists but is a discretionary, case-by-case OSHA enforcement policy, not an automatic multiplier.

  • Tied-back, wedged, or removed lower guard on a portable circular saw (1910.243(a)(1)).
  • Portable abrasive grinder without a wheel guard (1910.243(c)).
  • Belt sander with unguarded nip points or belt runs (1910.243(a)(3)).
  • Missing upper guard on a portable circular saw (1910.243(a)(1)(i)).
  • Using a damaged tool with a non-functional guard (1910.243).

Tying back a circular-saw lower guard is a violation, and a direct amputation risk

The single most common portable-tool violation is defeating the self-retracting LOWER guard on a circular saw. Workers tie it back, wedge it, or remove it because it can stick or slow down plunge cuts. But that lower guard is what covers the blade the instant the saw leaves the material, without it, a saw set down or carried while the blade coasts is an exposed, spinning blade against the operator's leg or hand. 1910.243 requires the lower guard to automatically return to cover the blade when the saw is withdrawn from the work. A "temporarily" tied-back guard is neither temporary in practice nor compliant, and it is exactly the configuration behind many serious circular-saw lacerations and amputations.

What OSHA inspectors look for

A compliance officer checks that portable circular saws have functioning upper and lower blade guards (the lower guard retracting and returning), that portable grinders have wheel guards, and that other handheld powered tools are guarded and safe. Tied-back or missing lower saw guards are the classic finding.

Example: how a violation is cited

A worker wedges the retractable lower guard of a portable circular saw open "so it doesn't stick," and the exposed blade contacts his leg when he sets the saw down still spinning. OSHA cites 1910.243 for the disabled lower guard, with penalties from $16,550.

Illustrative example, not a specific OSHA case.

Portable Tool Guarding compliance checklist

Use this to evaluate your compliance with 29 CFR 1910.243. Each item is a key requirement OSHA may verify during an inspection.

  • Ensure portable circular saws have working upper and lower guards.
  • Verify the lower guard retracts on the cut and returns automatically when withdrawn.
  • Never tie back, wedge, or remove a saw guard.
  • Guard portable abrasive grinders and cutoff wheels with wheel guards.
  • Guard belt sanders at nip points and unused belt runs.
  • Inspect handheld powered tools and remove damaged or unguarded ones from service.

2026 penalties for 29 CFR 1910.243

Maximums set by 29 CFR 1903.15(d). 2026 amounts unchanged from 2025 (no CPI adjustment; OMB M-26-11). Not an increase. The 2025 OSHA penalty levels remain in effect for 2026; OSHA made no inflation adjustment for 2026. 29 CFR 1903.15 identifies January 15, 2025 as the effective reference for these amounts, while OSHA's public penalties page currently references penalties assessed after Jan. 15, 2026.

Violation typeMinimumMaximumWhen it applies
Serious$1,085$16,550Substantial probability of death or serious physical harm.
Other-Than-Serious$0$16,550Relates to safety/health but unlikely to cause death or serious harm.
Willful$11,823$165,514Intentional, knowing, or voluntary disregard of the requirement.
Repeated$4,256$165,514A substantially similar violation cited within the last 5 years.
Failure to AbateNone$16,550/dayup to $16,550 per day; total capped at 30x the daily amount (FOM Ch.6)

Portable-tool guarding violations are common in general-industry inspections. Serious violations reach $16,550 and willful or repeat violations $165,514.

Maximums and the willful minimum are set by 29 CFR 1903.15(d); the serious and repeated minimums are OSHA policy floors from its annual penalty adjustment memo. OSHA applies gravity-based and size, good-faith and history reductions (FOM CPL 02-00-164 Ch.6). Estimates only, not legal advice.

The business case for Portable Tool Guarding compliance

Handheld power tools put a fast-moving blade, wheel, or belt inches from the operator's hands and body, and the guards that come on them are the main protection against lacerations, amputations, and abrasive-wheel injuries. 1910.243 requires those guards to be present and functional, including the self-retracting lower guard on circular saws that workers are tempted to tie back, so a moment's slip does not become a serious injury.

Free compliance tools for 29 CFR 1910.243

Job Hazard Analysis BuilderPPE SelectorWeekly Site Safety Inspection

Portable Tool Guarding penalties by state

Penalties and enforcement vary by state. State-Plan states may impose higher penalties and additional requirements beyond federal 29 CFR 1910.243.

AlabamaArkansasColoradoConnecticutDelawareDistrict of Columbia
View all 50 states + DC →

Frequently asked questions about 29 CFR 1910.243

Do portable circular saws need guards?

Yes. Under 1910.243(a)(1)(i), all portable, power-driven circular saws with a blade diameter greater than 2 inches must have guards above and below the base plate or shoe. The lower guard must cover the blade to the depth of the teeth during the cut and automatically return to cover the blade when the saw is withdrawn from the work.

Can I tie back the lower guard on a circular saw?

No. Tying back, wedging, or removing the self-retracting lower guard on a portable circular saw violates 1910.243 and is extremely dangerous. The lower guard is what covers the spinning blade when the saw leaves the material; without it, a saw set down or carried while the blade coasts can cause serious lacerations or amputations. The guard must be functional and allowed to return automatically.

What portable tools does 1910.243 cover?

1910.243 covers guarding of portable powered tools in general industry, including portable circular saws, abrasive grinders and cutoff tools, belt sanders, and other handheld power tools. It requires guards on the hazardous moving parts (blades, wheels, belts) and safe-use provisions, complementing the fixed-machinery guarding standard 1910.212.

Does 1910.243 apply to grinders?

Yes. Portable abrasive grinders and cutoff wheels are covered by 1910.243, which requires wheel guards to protect the operator from the wheel and from fragments if the wheel breaks. (Fixed bench and pedestal grinders are covered by the abrasive-wheel machinery standard 1910.215; portable grinders fall under 1910.243.)

Regulatory history of 29 CFR 1910.243

The portable powered-tool guarding requirements in 1910.243 were adopted from established national consensus standards (the ANSI power-tool safety codes) when OSHA began in 1971. They remain the guarding baseline for handheld saws, grinders, and sanders, complementing the fixed-machinery guarding standard 1910.212.

Related glossary terms

Key terms that appear in 29 CFR 1910.243, each with a full plain-English explainer.

Caught-In/BetweenStruck-ByHierarchy of ControlsPersonal Protective Equipment (PPE)

Related guides & articles

OSHA Machine Guarding Requirements Complete GuideOSHA Safety Training Requirements 2026

Related OSHA standards

29 CFR 1910.212

Machine Guarding

#10 most cited

29 CFR 1910.213

Woodworking Machinery

29 CFR 1910.215

Abrasive Wheels

29 CFR 1910.217

Power Presses

Primary sources

OSHA figures on this page are imported from HazComFast's verified regulatory module (verified 2026-10-05 against eCFR, OSHA.gov, and the Federal Register).

This page is an educational summary, not legal advice. OSHA standards and penalty amounts change; confirm requirements against the current regulation and your applicable State-Plan before acting.

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Serious Violation

$16,550

per violation (max)

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