What Is a Power Tool? | Defining Powered Equipment

That’s the definition the Occupational Safety and Health Administration (OSHA) uses to classify equipment on American job sites. When you pick up anything from a drill to a radial arm saw, the question of What Is a Power Tool comes down to one thing: where the energy comes from. If squeezing a trigger does the work for you, it’s a power tool. That distinction matters because safety rules, training requirements, and operational limits shift with the power source.

The Standard OSHA Definition of Power Tools

OSHA’s hand and power tool safety materials define power tools as those powered by electricity, pneumatic force, fuel, hydraulic power, or powder-actuated mechanisms. This is the baseline used across US workplace safety enforcement. The agency makes a firm separation: hand tools run on manual effort, while power tools rely on that external source. The same OSHA documents note power tools become hazardous when used improperly, which is why the classification drives real safety obligations. Workers who understand the definition also understand why a tool’s energy source dictates what personal protective equipment and guards are needed. Choosing the right kit starts with knowing which class each tool falls into.

For a practical guide to which tools belong together in a starter setup, see our tested lineup of the best combo power tool kits.

How Are Power Tools Classified?

Classification follows the power source, not the shape or brand of the tool. OSHA separates powered equipment into five groups, and each carries its own set of handling rules. Electric tools are the most common in home workshops, running on either corded AC power or rechargeable batteries. Pneumatic tools use compressed air, which makes them favorites in auto shops for their torque-to-weight ratio. Fuel-powered tools — chainsaws, plate compactors, and generators — burn gasoline or diesel. Hydraulic tools convert fluid pressure into force, used for heavy lifting and crimping jobs. Powder-actuated tools fire a fastener using a gunpowder charge, and they are held to the strictest operating standards to earn their use on job sites.

Why the Definition Matters for Safety

OSHA’s guidance doesn’t just label tools — it assigns responsibility. Because power tools are hazardous when used improperly, the agency requires guards on all exposed moving parts and safety switches that prevent accidental startups. A tool classified as pneumatic needs different pressure checks than an electric tool needs insulation checks. Knowing the definition tells you which inspection routine applies. One of the most common mistakes is treating all powered equipment as identical, when rules actually differ by energy source. Powder-actuated tools, for instance, demand operator training that a cordless drill never requires.

Another common mistake is assuming “portable” is part of the definition. OSHA’s documents cover hand and portable powered tools, but the core definition has nothing to do with size — a stationary table saw and a handheld jigsaw both qualify as power tools based purely on their energy source. Workplace safety guidance from OSHA applies to US job sites and is supported by state-plan resources for states running their own programs.

FAQs

Is a cordless drill considered a power tool?

Yes. A cordless drill runs on battery-stored electricity, which OSHA classifies as electric power. The absence of a cord does not change the classification; the tool still converts stored electrical energy into mechanical force rather than relying on manual effort from the operator.

What is the difference between a hand tool and a power tool?

Hand tools are powered entirely by manual effort — a hammer, screwdriver, or wrench uses only the force the operator applies. Power tools use an external source such as electricity or compressed air to do the work. OSHA defines these two categories separately because each has distinct safety requirements and use protocols.

Do power tool safety rules vary by type?

Yes, and significantly. OSHA requires guards and safety switches on all power tools, but the specific protections differ. Pneumatic tools need proper air pressure regulation, electric tools require insulation checks, and powder-actuated tools mandate operator training. The energy source governs which safety standard applies to the equipment.